- Abbot
- Abingdon
- Acorn Acres
- Adair
- Adams
- Adams Corner
- Adams County
- Adams (historical)
- Addieville
- Addison
- Adeline
- Aden
- Adenmoor
- Adkins Election Precinct
- Adrian
- Advance
- Afolkey
- Afton Center
- Agnew
- Ahern
- Aiken
- Akin
- Akin Junction
- Akron
- Aladdin
- Alandale
- Albany
- Albany Park
- Albers
- Albion
- Albion 1 Election Precinct
- Albion 2 Election Precinct
- Albion 3 Election Precinct
- Alda
- Alden
- Aldine Square
- Aldridge
- Aledo
- Alexander
- Alexander County
- Alexander Election Precinct
- Alexis
- Alexis Junction
- Algonquin
- Alhambra
- Aliceville
- Allen
- Allendale
- Allens Corners
- Allens Spring
- Allentown
- Allenville
- Allerton
- Allright
- Alma
- Almora
- Almora Heights
- Alonzo
- Alorton
- Alpha
- Alpine
- Alsey
- Alsey Election Precinct
- Alsip
- Alta
- Altamont
- Altgeld Gardens
- Altmar
- Alton
- Altona
- Alto Pass
- Alto Pass Election Precinct
- Altorf
- Alvin
- Alworth
- Amboy
- Amenia
- Ament Corners
- America
- America Election Precinct
- Ames
- Amherst
- Amity
- Anchor
- Ancient Oaks
- Ancient Tree
- Ancona
- Andalusia
- Anderson
- Andover
- Andres
- Andrew
- Andrews and Hurds Subdivision
- Anetsberger's Subdivision
- Anna
- Anna District Number 1 Election Precinct
- Anna District Number 2 Election Precinct
- Anna District Number 3 Election Precinct
- Anna District Number 4 Election Precinct
- Anna District Number 5 Election Precinct
- Anna District Number 6 Election Precinct
- Annapolis
- Annawan
- Antioch
- Appalokia (historical)
- Appaloosa West
- Applegate
- Apple River
- Appleton
- Aptakisic
- Arboretum Estates
- Arbury Hills
- Arcade Row
- Arcadia
- Arcadia Election Precinct
- Archer
- Archer Heights
- Archer Limits
- Archie
- Arcola
- Arenzville
- Argenta
- Argo Fay
- Argyle
- Arlington
- Arlington Heights
- Armington
- Armour Patch
- Armour Square
- Armsby (historical)
- Armstrong
- Arnold
- Aroma Park
- Arpee
- Arrowhead
- Arrow Ridge Mobile Home Park
- Arrowsmith
- Arthur
- Arthur L Johnson Subdivision
- Ashburn
- Ashdale Junction
- Ashkum
- Ashland
- Ashley
- Ashmore
- Ashton
- Askvig Addition
- Assumption
- Astoria
- Athens
- Athens North Number 2 Election Precinct
- Athens South Number 1 Election Precinct
- Athensville
- Atkinson
- Atlanta
- Atlas
- Atterberry
- Atterberry Number 10 Election Precinct
- Attila
- Atwater
- Atwood
- Atwood Estates
- Atwood Park Estates
- Auburn
- Auburn Park
- Augerville
- Augsburg
- Augusta
- Aurora
- Austin
- Aux Sable
- Ava
- Avalon Highlands
- Avalon Park
- Avanti Ridge
- Avena
- Avery Hill
- Averyville
- Aviston
- Avoca (historical)
- Avon
- Avondale
- Ayers
- Babcock
- Babylon
- Bachs Addition
- Back of the Yards
- Bader
- Bailey Falls (historical)
- Baileyville
- Bainbridge
- Baker
- Bakers Acres
- Bakers Crossroads
- Bakerville
- Balcom
- Balcom Election Precinct
- Bald Bluff
- Bald Mound
- Baldwin
- Baldwin Beach
- Baldwin Election Precinct
- Baldwin Heights
- Ballou
- Bancroft Corners
- Bando
- Banklick
- Banner
- Bannister
- Bannockburn
- Barbers Corners
- Barclay
- Bardolph
- Barlow Park
- Barnard Mill (historical)
- Barnes
- Barnett
- Barnhill
- Barr
- Barreville
- Barrington
- Barrington Center
- Barrington Hills
- Barrington Woods
- Barrow
- Barry
- Barstow
- Bartelso
- Bartlett
- Bartonville
- Basco
- Batavia
- Batavia Junction
- Batchtown
- Bates
- Batestown
- Bath
- Baum
- Bay City
- Bayle City
- Baylestown
- Baylis
- Bay View Garden
- Beach Park
- Beach Station
- Beacon Hill
- Beamington
- Beardstown
- Bearsdale
- Beason
- Beaty
- Beaucoup
- Beaucoup Election Precinct
- Beaver Creek
- Beaverton Crossroads
- Beaverville
- Beckemeyer
- Becks Park
- Bedford
- Bedford Park
- Beecher
- Beecher City
- Beechville
- Bee Creek
- Beeler Terrace
- Beiler Subdivision
- Belden
- Belgium
- Belgium Row
- Belgravia Terrace
- Belknap
- Belknap Election Precinct
- Bell
- Bellair
- Belle Prairie City
- Belle Rive
- Belleview
- Belleview Election Precinct
- Belleville
- Bellevue
- Bellflower
- Bellmont
- Bellmont Election Precinct
- Bell Ridge
- Belltown
- Bellwood
- Belmont
- Belmont Cragin
- Belmont Park
- Belmont Village
- Beltrees
- Belvidere
- Bement
- Bender (historical)
- Benld
- Bennett
- Bennett Landing
- Bennington
- Bensenville
- Benson
- Bentley
- Benton
- Benton Election Precinct
- Benton Park
- Bentown
- Benville
- Berdan
- Berger
- Berkeley
- Berkeley Cottages
- Berlin
- Bernadotte (historical)
- Bernice
- Berry
- Berryville
- Berwick
- Berwyn
- Bessie
- Bethalto
- Bethany
- Bethel
- Bethel (historical)
- Beulah Heights
- Beverly
- Beverly Hills
- Beverly Manor
- Bible Grove
- Biddleborn
- Big Bay
- Big Foot Prairie
- Biggs
- Biggsville
- Big Rock
- Big Run Acres
- Billett
- Bingham
- Binghampton
- Bingman Station
- Binney
- Binnie Hills
- Binnie Lakes
- Birch Island
- Birch Pond
- Birchwood
- Birds
- Birkbeck
- Birkner
- Birmingham
- Bishop
- Bishop Hill
- Bishops Ridge
- Bismarck
- Bissell
- Bixby
- Black
- Blackberry Acres
- Blackberry Woods
- Blackcrest
- Blackhawk
- Blackhawk Island Subdivision
- Blackhawk Island Subdivision Number 2
- Blackland
- Blacks
- Blackstone
- Blaine
- Blair
- Blair Election Precinct
- Blairsville
- Blakes
- Blanding
- Blandinsville
- Block
- Blodgett
- Bloomfield
- Bloomfield Election Precinct
- Bloomingdale
- Bloomington
- Bloomington Heights
- Blue Grass (historical)
- Blue Island
- Blue Mound
- Blue Point
- Blue Ridge
- Blueville
- Bluff City
- Bluff Junction
- Bluffs
- Bluffside
- Bluff Springs
- Bluford
- Blyton
- Boaz
- Bobtown
- Boden
- Bodmann
- Bogota
- Bohemian California
- Bohleysville
- Bolingbrook
- Bolivia
- Bolton
- Bond County
- Bondville
- Bone Gap
- Bone Gap Election Precinct
- Bonfield
- Bongard
- Bonnie
- Bonnie Valley
- Boody
- Boone County
- Boos
- Boothby
- Borton
- Boschome
- Boskydell
- Boulder
- Boulder Hill
- Bourbon
- Bourbonais (historical)
- Bourbonnais
- Bowen
- Bowes
- Bowes Bend
- Bowlesville (historical)
- Bowling Green (historical)
- Bowman (historical)
- Bowmanville
- Boyd
- Boyle
- Boyleston
- Boynton
- Braceville
- Bradbury
- Braden
- Bradford
- Bradfordton
- Bradless Subdivision
- Bradley
- Bradley (historical)
- Bradley Subdivision
- Braeside
- Braeside Subdivision
- Braidwood
- Brainerd
- Breckenridge
- Breeds
- Breese
- Bremen
- Bremen Election Precinct
- Brentwood
- Brereton
- Brewerville Election Precinct
- Brewster Heights
- Briar Bluff
- Briar Gate
- Briar Hill
- Briarwood
- Briarwood Glen
- Bricktown
- Bridgeport
- Bridgeport (historical)
- Bridgeview
- Bridgeway Addition
- Bridlewood Lane
- Bridlewoods
- Briergate
- Briergate Station
- Brierwoods
- Briggs Landing
- Brighton
- Brighton Park
- Brimfield
- Brinksburg (historical)
- Brisbane
- Bristol
- Bristol (historical)
- Broadlands
- Broadmoor
- Broadview
- Broadwell
- Brockdale Manor
- Brocton
- Brokaw
- Bronson
- Bronzeville
- Brookdale
- Brookfield
- Brook Lawn
- Brookline
- Brooklyn
- Brookport
- Brooks
- Brookside
- Brookside Estates
- Brookville
- Brothers
- Broughton
- Brown County
- Brownfield
- Browning
- Browns
- Browns Crossing
- Browns Election Precinct
- Browns Mill
- Brownsport (historical)
- Brownstown
- Brownsville
- Brownton (historical)
- Brownwood
- Brubaker
- Bruce
- Brussels
- Bryant
- Bryce
- Buckeye
- Buckhart
- Buckhorn
- Buckhorn Corners
- Buckingham
- Buckley
- Buckner
- Bucks
- Bucktown
- Buda
- Budd
- Buena Park
- Buena Vista
- Buffalo
- Buffalo Grove
- Buffalo Hart
- Buffalo Prairie
- Bulldog Crossing
- Bull Valley
- Bulpitt
- Buncombe
- Bungay
- Bunje
- Bunker Hill
- Bunkum
- Burbank
- Bureau
- Bureau County
- Burgess
- Burke
- Burksville
- Burksville Station
- Burlingame
- Burlington
- Burnett
- Burnham
- Burnham Place
- Burning Tree
- Burns
- Burnside
- Burnside Election Precinct
- Burnside (historical)
- Burnt Prairie
- Burr Oak Acres
- Burrowsville
- Burr Ridge
- Burt
- Burton
- Burtons Bridge
- Burton View
- Busenville
- Bush
- Bushnell
- Bushs Corners
- Bushton
- Butler
- Buttonwood
- Buzzville
- Bybee
- Byron
- Byron Hills Estates
- Cabery
- Cable
- Cabrini Addition
- Cache
- Cache Election Precinct
- Cache Lake
- Cadiz
- Cadwell
- Cahokia
- Cairo
- Cairo Election Precinct
- Cairo Junction
- Caldwell
- Caledonia
- Caledonia (historical)
- Calftown (historical)
- Calhoun
- Calhoun County
- California Park
- Calumet
- Calumet City
- Calumet Heights
- Calumet Park
- Calvin
- Camargo
- Cambon
- Cambria
- Cambridge
- Camden
- Cameron
- Camp Algonquin
- Campbell
- Campbell Hill
- Campbellsburg (historical)
- Camp Ground
- Camp Grove
- Camp Logan
- Camp Point
- Campton
- Campton Pines
- Camp Travis
- Campus
- Canalport
- Canal Trustees
- Canaryville
- Canton
- Cantrall
- Canyon Ridge
- Capitol Oaks
- Capri Village
- Capron
- Carbon
- Carbon Cliff
- Carbondale
- Carbon Hill
- Cardiff
- Cardinal Court
- Carle Springs
- Carlin Election Precinct
- Carlinville
- Carlock
- Carl Sandburg Village
- Carlsburg
- Carlye Subdivision
- Carlyle
- Carman
- Carmi
- Carol Stream
- Carpenter
- Carpenters Addition
- Carpentersville
- Carriage Lane Estates
- Carrier Mills
- Carroll County
- Carrollton
- Carterville
- Carthage
- Carthage Lake
- Cartter
- Carville
- Cary
- Cascade
- Casey
- Caseyville
- Casner
- Caspars
- Cass County
- Cass (historical)
- Castle Fin
- Castle Junction
- Castleton
- Catfish (historical)
- Catharine
- Catlin
- Caton Farm
- Cave-in-Rock
- Cave-In-Rock Election Precinct
- Cayuga
- Cazenovia
- Cedar Bluff Estates
- Cedar Brook
- Cedarbrook Court
- Cedar Creek
- Cedar Hills
- Cedar Lawn
- Cedar Park
- Cedar Point
- Cedarville
- Center Hill
- Centerville
- Centerville (historical)
- Centerville Station
- Central
- Central City
- Central Election Precinct
- Centralia
- Central Park
- Central Station
- Centreville
- Cereal
- Cerro Gordo
- Chadwick
- Chalfin Bridge
- Challacombe
- Chambersburg
- Chamness (historical)
- Champaign
- Champaign County
- Champlin
- Chana
- Chandlerville
- Channahon
- Channel Lake
- Chapel Hill
- Chapel Hill Estates
- Chapin
- Chapin Election Precinct
- Chapman
- Charlemagne
- Charlemagne East
- Charleston
- Charlotte
- Charlottsville (historical)
- Charring Cross
- Charter Grove
- Chatham
- Chatham Fields
- Chatsworth
- Chatton
- Chauncey
- Chautauqua
- Chautauqua Park
- Chebanse
- Checkrow
- Cheltenham
- Chemung
- Cheneyville
- Chenoa
- Cherry
- Cherry Hill
- Cherry Hill Estates
- Cherry Lane Estates
- Cherry Point
- Cherry Valley
- Cheshire Hills
- Chester
- Chester Election Precinct
- Chesterfield
- Chester Highlands
- Chestervale
- Chesterville
- Chestline
- Chestnut
- Cheyenne Heights
- Chicago
- Chicago Heights
- Chicago Lawn
- Chicago Ridge
- Chicken Bristle
- Childers Acres
- Chili
- Chillicothe
- Chinatown
- Chippewa
- Chipps
- Chittenden
- Chittyville
- Choat
- Choctaw
- Chrisman
- Christian County
- Christopher
- C H Taylor's Sanwaldrun Estates
- Churchill
- Churchville
- Cicero
- Cimic
- Cincinnati
- Cisco
- Cisne
- Cissna Park
- Citation Lake
- Cityfront Center
- Cityfront Place
- City of Chicago
- Civer (historical)
- Clank
- Clare
- Claremont
- Claremont Cottages
- Clarence
- Clarendon Hills
- Clarion
- Clark
- Clark Center
- Clark County
- Clarkdale
- Clarke City
- Clarke's Subdivision
- Clarksburg
- Clarksburg IL
- Clarksdale
- Clarksville
- Clarmin
- Claus
- Clay City
- Clay County
- Claypool
- Claypool Woods
- Clays Prairie
- Claysville
- Clayton
- Claytonville
- Clearing
- Clear Lake
- Cleaverville
- Cleburne
- Clements
- Cleone
- Cleveland
- Cleveland Subdivision
- Cliffdale
- Clifford
- Clifton
- Clifton Terrace
- Clifty Heights
- Clinton
- Clinton County
- Clintonville
- Cloverdale
- Clyde
- Coal City
- Coaler
- Coal Hollow
- Coalton
- Coal Valley
- Coalville
- Coatsburg
- Cobblewood
- Cobden
- Cobden District Number 1 Election Precinct
- Cobden District Number 2 Election Precinct
- Cody
- Coello
- Coffee Election Precinct
- Coffeen
- Colby Point
- Colchester
- Coldbrook
- Coleman
- Coles
- Coles County
- Coleta
- Colfax
- Collins
- Collins (historical)
- Collinsville
- Collison
- Colmar
- Colona
- Colonial Gardens
- Colonial Meadows
- Colonial Village
- Colp
- Columbia
- Columbiana (historical)
- Columbus
- Columbus (historical)
- Colusa
- Colvin Park
- Combs
- Comer
- Commanche Village
- Como
- Compro
- Compton
- Compton Election Precinct
- Conant
- Concord
- Concord Election Precinct
- Confidence
- Congerville
- Conleys Patch
- Conlogue
- Conover
- Conrad
- Conwayville (historical)
- Cook County
- Cookes Subdivision
- Cooks Mills
- Cooksville
- Cooper
- Cooperstown
- Copperfield
- Cora
- Coral
- Coral Manor
- Cordes
- Cordova
- Coreys Bluff
- Corinth
- Cornell
- Cornerville
- Cornland
- Cortland
- Corwith
- Cotswald Subdivision
- Cottage Grove
- Cottage Hills
- Cotton Hill
- Cottonwood
- Coughlin
- Coulterville
- Coulterville Election Precinct
- Council Hill
- Country Acres Mobile Home Park
- Country Club Estates
- Country Club Hills
- Country Meadows
- Countryside
- Countryside East
- Countryside West
- Covell
- Covenant Village
- Coventry Creek
- Coventry Hills
- Coventry Hills East
- Covington
- Cowden
- Cowling
- Coyne
- Coyne Center
- Coynes
- Cozy Corner
- Crab Orchard
- Crab Orchard Estates
- Cragin
- Crain
- Crainville
- Cramer
- Crandall
- Crane Road Estates
- Crane Woods Estates
- Crater Election Precinct
- Cravat
- Crawford
- Crawford Corners
- Crawford Countryside
- Crawford County
- Crawfordsville (historical)
- Creal Springs
- Creamery Corners
- Creekside
- Creekside of Long Grove
- Creekwood
- Crenshaw Crossing
- Crescent
- Crescent City
- Crest Hill
- Creston
- Crestwood
- Crestwood Acres
- Crete
- Creve Coeur
- Crisp
- Croft
- Cropsey
- Crossroads
- Cross Roads (historical)
- Crossville
- Cruger
- Cruse
- Crystal Gardens
- Crystal Lake
- Crystal Lawns
- Crystal Manor
- Crystal Vista
- Cuba
- Cullom
- Culton (historical)
- Culver
- Cumberland
- Cumberland County
- Curran
- Curtis
- Cushman
- Custer
- Custer Park
- Cutler
- Cutler Election Precinct
- Cutmer
- Cuyler
- Cypress
- Daggett (historical)
- Dahinda
- Dahlgren
- Dailey
- Dakota
- Dale
- Dallas City
- Dalton City
- Dalzell
- Damascus
- Damiansville
- Damon
- Dana
- Dana Court Subdivision
- Danforth
- Danley
- Danvers
- Danville
- Danway
- Dareville
- Darien
- Darmstadt
- Darmstadt (historical)
- Darrow
- Darwin
- Dauphin Park
- Davis
- Davis (historical)
- Davis Junction
- Dawleys
- Dawson
- Daysville
- Dayton
- Dean-Horsch Subdivision
- Dearborn Homes
- Decatur
- Decorra
- Deer Chase
- Deer Creek
- Deercrest Estates
- Deerfield
- Deer Grove
- Deering City
- Deer Lake
- Deer Lake Meadows
- Deer Park
- Deerpath
- Deerpath Estates
- Deer Plain
- Deer Ridge
- Deer Run
- Deers
- Dees
- Degognia
- Dehne's Subdivision
- DeKalb
- DeKalb County
- Delafield
- De Land
- Delavan
- Delbert Egan Housing Project
- Delhi
- Del Mar Woods
- DeLong
- Delrey
- Delta
- Delwood
- Democrat Spring
- Denmark
- Denmark (historical)
- Dennison
- Denny
- Denny (historical)
- Denrock
- Denver
- Depler Springs
- Depue
- Derby
- Deselm
- De Soto
- Des Plaines
- Detroit
- Devereux Heights
- Dewey
- De Witt
- De Witt County
- Dewmaine
- Dexter
- Diamond
- Diamond City
- Diamond Cross
- Diamond Lake
- Diana
- Dickerson
- Dickeys
- Dieterich
- Dillon
- Dillonfield
- Dillsburg
- Dimmick
- Diona
- Disco
- Diswood
- Divernon
- Divide
- Divine
- Dix
- Dixmoor
- Dixon
- Dixon Election Precinct
- Dixon Springs
- Doddsville
- Dog Walk
- Dogwood
- Dolands Addition
- Dollville
- Dolton
- Doney
- Dongola
- Dongola District Number 1 Election Precinct
- Dongola District Number 2 Election Precinct
- Donkville
- Donnellson
- Donny Hill Meadows
- Donovan
- Donovan Glen Subdivision
- Dorans
- Dorchester
- DorothyStirling Estates
- Dorothy Stirling Subdivision
- Dorris Heights
- Dorrisville
- Dorsey
- Douglas
- Douglas County
- Douglas Park
- Dover
- Dover Pond
- Dow
- Dowell
- Downers Grove
- Downing Street Subdivision
- Downs
- Doyles
- Dozaville
- Dressor
- Drexel Estate
- Driftwood
- Drivers
- Druce Lake
- Drummond
- Dry Hill
- Du Bois
- DuBois Center
- Ducktown
- Dudley
- Dudleyville
- Duncan
- Duncan Mills
- Duncans Addition
- Duncanville
- Dundas
- Dundee Road Acres
- Dunes Park
- Dunfermline
- Dunham Castle
- Dunkel
- Dunlap
- Dunn
- Dunn Corners
- Dunning
- Dunsten Green
- DuPage County
- Dupo
- Du Quoin
- Du Quoin Number 10 Election Precinct
- Du Quoin Number 11 Election Precinct
- Du Quoin Number 12 Election Precinct
- Du Quoin Number 1 Election Precinct
- Du Quoin Number 2 Election Precinct
- Du Quoin Number 3 Election Precinct
- Du Quoin Number 4 Election Precinct
- Du Quoin Number 5 Election Precinct
- Du Quoin Number 6 Election Precinct
- Du Quoin Number 7 Election Precinct
- Du Quoin Number 8 Election Precinct
- Du Quoin Number 9 Election Precinct
- Durand
- Durham
- Durley
- Dutch Hollow
- Dutch Mills
- Dutton (historical)
- Duvall
- Dwight
- Dykersburg
- Eagerville
- Eagle
- Eagle Lake
- Eagle Park
- Eagle Point
- Eagle Point Bay
- Eagle Ridge
- Earlville
- East Alton
- East Brooklyn
- East Brooklyn Election Precinct
- Eastburn
- East Cape Election Precinct
- East Cape Girardeau
- East Carondelet
- East Clinton
- East Dubuque
- East Dundee
- East Galesburg
- East Garfield Park
- East Gillespie
- East Grossdale
- East Hannibal
- East Hardin
- East Hazel Crest
- East Joliet
- East Lawndale
- East Lynn
- East Meadows
- East Moline
- East Newbern
- Easton
- East Paw Paw
- East Peoria
- East Rosiclare Election Precinct
- East Saint Louis
- East Side
- East Springfield
- East Stockton (historical)
- East Village
- Eastwood Manor
- Eberle
- Ebner
- Echo Lake
- Eckard
- Eddy
- Eddyville
- Eddyville Number 6 Election Precinct
- Edelstein
- Eden
- Eden Park
- Edgar
- Edgar County
- Edgebrook
- Edgebrook Mobile Home Park
- Edgemont
- Edgetown
- Edgewater
- Edgewood
- Edgewood Grove
- Edgington
- Edinburg
- Edison
- Edmund F Burton Row Houses
- Edwards
- Edwards County
- Edwardsville
- Effingham
- Effingham County
- Effner
- Egan
- Egandale
- Egyptian Acres
- Egyptian Hills
- Egypt Shores
- Eichorn
- Eileen
- Elba
- Elba Center
- Elbow
- Elbridge
- Elburn
- Elco
- Elco Election Precinct
- El Dara
- Eldena
- Elderville
- Eldorado
- Eldred
- Eldridge
- Eleanor
- Eleroy
- Elgin
- Eliza
- Elizabeth
- Elizabethtown
- Elk Grove
- Elk Grove Village
- Elkhart
- Elkhorn Grove
- Elkton
- Elkville
- Ellery
- Ellery Election Precinct
- Elliott
- Elliottstown
- Ellis
- Ellis Grove
- Ellis Grove Election Precinct
- Ellison (historical)
- Ellisville
- Ellsworth
- Elm Grove (historical)
- Elmhurst
- Elmira
- Elmore
- Elmoville
- Elm Point (historical)
- Elmwood
- Elmwood Park
- Elmwood Place
- El Paso
- Elsah
- Elsdon
- Eltham (historical)
- Elva
- Elvaston
- Elvira
- Elvira Election Precinct
- El Vista
- Elwin
- Elwood
- Embarrass
- Emden
- Emerald Acres
- Emerald Park
- Emerson
- Emerson City
- Emery
- Emington
- Emma
- Empire
- Empire Hills
- Energy
- Enfield
- Englewood
- Enion
- Enos
- Enright
- Enterprise
- Eola
- Epplyanna
- Epworth
- Equality
- Equestrian Estates
- Equestrian Woods
- Erie
- Ernst
- Erwin
- Esmond
- Essex
- Estates of Charlemagne
- Estates of Indian Creek
- Estates of Stone Creek
- Etherton
- Etna
- Eugene
- Eureka
- Evans
- Evans Heights Housing Project
- Evanston
- Evansville
- Evansville Election Precinct
- Evanswood
- Evarts
- Everett
- Evergreen Park
- Evergreen Subdivision
- Evergreen Terrace
- Evergreen Village Mobile Home Park
- Evers
- Ewbanks
- Ewing
- Ewington
- Exermont
- Exeter
- Exeter-Bluffs Election Precinct
- Exline
- Exposition View
- Eylar
- Factory Addition
- Fair Acres
- Fairbanks
- Fairbury
- Fairdale
- Fairfax Village
- Fairfield
- Fairgrange
- Fair Haven
- Fairland
- Fairman
- Fair Meadows
- Fairmont
- Fairmont City
- Fairmont Place
- Fairmount
- Fair Oaks
- Fairview
- Fairview Heights
- Faithorn
- Fall Creek
- Falling Spring
- Falmouth
- Fancher
- Fancy Prairie
- Fancy Prairie Number 3 Election Precinct
- Fandon
- Fargo
- Faries Park (historical)
- Farina
- Farmdale
- Farmer City
- Farmersville
- Farmingdale
- Farmington
- Farm Ridge
- Farmsville (historical)
- Farrington
- Far View
- Fayette
- Fayette County
- Fayetteville
- Fayville
- Fenton
- Ferber
- Fergestown
- Ferndale
- Ferndale Woods
- Fernway
- Fernway Park
- Ferrel
- Ferrin
- Ferris
- Ferson Creek Woods
- Fiatt
- Ficklin
- Fidelity
- Fieldon
- Fields of Saratoga
- Fifty Acres
- Fillmore
- Fillmore (historical)
- Film Row
- Filson
- Findlay
- Finneyville
- Fisher
- Fishhook
- Fitchmoor
- Fithian
- Fitzgerrell (historical)
- Five Island Park
- Five Points
- Flagg
- Flagg Center
- Flanagan
- Flat Rock
- Flatville
- Flatwoods
- Flemingsburg (historical)
- Fletcher
- Flickerville
- Flint
- Flora
- Floral Terrace Estates
- Floraville
- Florence
- Florian
- Florid
- Flossmoor
- Flossmoor Highlands
- Flowerfield
- Fogarty
- Fond du Lac
- Fondulac Plaza Shopping Center
- Foosland
- Fopal
- Ford County
- Ford Heights
- Forest City
- Forest Green Lake Estates
- Forest Hill
- Forest Hills
- Forest Homes
- Forest Lake
- Forest Park
- Forest River
- Forest View
- Forest View Estates
- Forestville
- Forman
- Formosa Junction
- Forrest
- Forreston
- Forsyth
- Fort Dearborn Addition
- Fort Gage
- Fort Hill
- Forty Acres
- Fossland
- Fosterburg
- Foster Pond (historical)
- Fountain
- Fountain Creek
- Fountain Gap
- Fountain Green
- Four Corners
- Fournins Subdivision
- Fowler
- Fox
- Foxborough Estates
- Fox Chase Estates
- Foxcroft
- Foxfield
- Fox Hedge
- Fox Hills
- Fox Lake
- Fox Lake Hills
- Fox Point North
- Fox River Estates
- Fox River Grove
- Fox River Heights
- Fox River Shores
- Fox Run
- Foxville
- Frahms Country Acres
- Frances Cabrini Homes
- Francis
- Frankfort
- Frankfort Square
- Franklin
- Franklin Corners
- Franklin County
- Franklin Election Precinct
- Franklin Gardens
- Franklin Grove
- Franklin Park
- Franklinville
- Franks
- Fransonia (historical)
- Fravert
- Frederick
- Fredonia
- Fredonia (historical)
- Freeburg
- Freedom Centre (historical)
- Freedville
- Freeman
- Freeman Spur
- Freenanton (historical)
- Freeport
- Fremont Center
- Fremont (historical)
- French Creek Election Precinct
- French Village
- Frielings
- Friendsville
- Friendsville Election Precinct
- Frisco
- Fritchens Subdivision
- Frogtown
- Frontenac
- Fruit
- Fruitland
- Fuller
- Fuller Park
- Fullersburg
- Fullerton
- Fulls
- Fulton
- Fulton Center (historical)
- Fulton County
- Fults
- Funkhouser
- Funks Grove
- Furman
- Future City
- Gage Park
- Gages Lake
- Galatia
- Gale
- Galena
- Galena Junction
- Galesburg
- Galesville
- Galewood
- Gallagher
- Gallatin County
- Galt
- Galton
- Galva
- Ganntown
- Gano
- Garber
- Gard
- Gardena
- Garden Court
- Garden Heights
- Garden Homes
- Garden of Eden
- Garden Plain
- Garden Prairie
- Gardner
- Gards Point
- Garfield
- Garfield Manor
- Garfields
- Garibaldi Square
- Garland
- Garnerville
- Garrett
- Garrison
- Gartside
- Gary
- Gaskins City
- Gaslight Village
- Gays
- Gears Ferry
- Geff
- Geneseo
- Genet
- Geneva
- Geneva Road
- Genoa
- Georges Creek Election Precinct
- Georgetown
- Gerald
- Gerlaw
- German Corner
- Germantown
- Germantown Hills
- German Valley
- Giblin
- Gibson City
- Gibsonia
- Gifford
- Gila
- Gilberts
- Gilbirds
- Gilchrist
- Gilead
- Gilead Election Precinct
- Gillespie
- Gilletts
- Gillum
- Gilman
- Gilmer
- Gilmore
- Gilson
- Ginger Hill
- Gingle Corners
- Girard
- Gladstone
- Glasford
- Glasgow
- Glasgow Election Precinct
- Glenarm
- Glen Avon
- Glenbrook Acres West
- Glenbrook Countryside
- Glenburn
- Glen Carbon
- Glen Carbon Crossing
- Glencoe
- Glendale
- Glendale Heights
- Glendale (historical)
- Glen Ellyn
- Glenn
- Glen Oak
- Glenview
- Glenwood
- Glenwood (historical)
- Globe
- Glover
- Godfrey
- Godley
- Goeselville
- Golconda
- Golconda Number 1 Election Precinct
- Golconda Number 2 Election Precinct
- Golconda Number 3 Election Precinct
- Gold Coast
- Golden
- Golden Acres
- Golden Eagle
- Golden Gardens
- Golden Gate
- Golden Lily
- Golf
- Golf Lakes
- Goodenow
- Goode Subdivision
- Goodfield
- Good Hope
- Goodings Grove
- Goodrich
- Goodwine
- Goofy Ridge
- Gordon
- Goreville
- Goreville Number 1 Election Precinct
- Goreville Number 2 Election Precinct
- Gorham
- Gorman
- Gossett
- Gottfred Subdivision
- Gougars
- Gowansville (historical)
- Gowins
- Grace Abbott Homes
- Grace Manor
- Grafton
- Grand Boulevard
- Grand Chain
- Grand Chain Election Precinct
- Grand Crossing
- Grand Detour
- Grand Pass
- Grand Ridge
- Grand Tower
- Grandview
- Grandview Acres
- Grandwood Park
- Graney
- Grange Hall
- Granite City
- Grant Election Precinct
- Grantfork
- Grant Park
- Grantsburg
- Grantsburg Number 1 Election Precinct
- Grantsburg Number 2 Election Precinct
- Grant View Heights
- Grant Village
- Granville
- Granville Gardens
- Grape Creek
- Grass Lake
- Grayland
- Graymont
- Graymoor
- Grays Corner
- Grayslake
- Grayville
- Great Lakes
- Green Acres
- Green Bay
- Greenbriar
- Greenbriar Highlands
- Green Brier
- Greenbush
- Green Castle
- Green Creek
- Greendale
- Greene County
- Greenfield
- Greenland (historical)
- Greenoak
- Green Oaks
- Greenpond
- Greenridge
- Greenridge Estates
- Green River
- Green Rock
- Greenup
- Green Valley
- Greenview
- Green View Heights
- Greenview Number 6 Election Precinct
- Greenville
- Greenville (historical)
- Greenwich
- Greenwood
- Greer
- Gretna
- Gridley
- Griffin
- Griffin (historical)
- Grigg
- Griggsville
- Grimes Addition
- Grimsby
- Grinnell
- Grisold (historical)
- Griswold
- Groat
- Gross
- Gross Point
- Grove
- Grove City
- Groveland
- Grubbs
- Grumle Corner
- Grundy County
- Guilford
- Gulfport
- Gurnee
- Gurney (historical)
- Guthrie
- Hadley
- Haegers Bend
- Hagaman
- Hagarstown
- Hagener
- Hahnaman
- Hainesville
- Haldane
- Hale Ridge (historical)
- Half Day
- Hallidayboro
- Hallock
- Hallsville
- Halltown (historical)
- Halsey
- Hamburg
- Hamburg Election Precinct
- Hamburg Landing
- Hamel
- Hamilton
- Hamilton Corners
- Hamilton County
- Hamilton Estates
- Hamlet
- Hamletsburg
- Hamlin Park
- Hammond
- Hampshire
- Hampton
- Hancock County
- Hanks Station
- Hanna City
- Hanover
- Hanover Park
- Hansen Subdivision
- Hanson
- Hanson Park
- Happy Hills
- Harbor Light Bay
- Harbor Square
- Harco
- Hardin
- Hardin County
- Hardin Election Precinct
- Harding
- Hardinville
- Harlem
- Harmon
- Harmony
- Harness
- Harper
- Harper (historical)
- Harpster
- Harris
- Harrisburg
- Harris Corners
- Harris Grove (historical)
- Harrison
- Harrison Avenue Gardens
- Harrisonville
- Harristown
- Harrisville
- Hartford
- Hartland
- Hartsburg
- Hartshorn
- Hartsville
- Harvard
- Harvard Hills
- Harvel
- Harvey
- Harwood Heights
- Hastings
- Havana
- Hawkins Glen
- Hawley (historical)
- Hawthorne Hills
- Hawthorne Place
- Hawthorn Knolls
- Hawthorn Woods
- Hayes
- Haynes
- Haypress
- Hazel Crest
- Hazel Dell
- Hazel Green
- Hazelhurst
- Heapsville
- Heart O' Northbrook
- Heartville
- Heathercrest
- Heatherfield
- Heather Highlands
- Heatherlea
- Heathsville
- Heaton
- Heaton Park
- Hebron
- Hecker
- Hedgerow
- Hedgewood
- Hegeler
- Hegewisch
- Helena
- Helm
- Helmar
- Heman
- Henderson
- Henderson County
- Henderson Grove
- Hendrix
- Henkel
- Hennepin
- Henning
- Henry
- Henry County
- Henton
- Herald
- Herbert
- Herborn
- Heritage West
- Hermon
- Hermosa
- Herod
- Herons Crossing
- Herrick
- Herrin
- Herrin Junction
- Herscher
- Hersman
- Hervey City
- Hettick
- Hewittville
- Heyworth
- Hickman
- Hickory Corners
- Hickory Creek
- Hickory Grove
- Hickory Hill
- Hickory Hills
- Hickory Point
- Hickory Ridge
- Hickory View Estates
- Hicks
- Hicks Corners
- Hidalgo
- Hidden Hill
- Hidden Lake
- Hidden Lakes
- Hidden Valley
- Higginsville
- Highcrest
- Highland
- Highland Estates
- Highland Haven
- Highland Hills
- Highland Park
- Highlands
- Highland Town (historical)
- Highland Woods
- Highmoor
- High Point
- Highview
- Highway Village
- Highwood
- Hildreth
- Hill
- Hillcrest
- Hillerman
- Hillerman Election Precinct
- Hillery
- Hillsboro
- Hillsboro Heights
- Hillsdale
- Hills Grove (historical)
- Hillside
- Hillside Manor
- Hilltop
- Hill Top
- Hilltop Trailer Park
- Hillview
- Himrod
- Hinckley
- Hindsboro
- Hines
- Hinsdale
- Hitt
- Hodges Park
- Hodgeville
- Hodgkins
- Hoffman
- Hoffman Estates
- Hogue Town
- Holbrook
- Holcomb
- Holcombville Corners
- Holden
- Holder
- Holiday Hills
- Holiday Shores
- Holland
- Holliday
- Hollis
- Hollowayville
- Hollywood Heights
- Holmes
- Holmes Corner
- Homberg
- Homefinders
- Homer
- Homer Glen
- Hometown
- Homeward Hill
- Homewood
- Honey Bend
- Honey Creek
- Honeymoon Row
- Hoodville
- Hookdale
- Hooper
- Hoopeston
- Hooppole
- Hoosier
- Hope
- Hopedale
- Hopewell
- Hopkins Park
- Hopper
- Horace
- Horatio Gardens
- Hord
- Hornsby
- Horseshoe
- Horton
- Houston
- Howard
- Howard District
- Howards Point (historical)
- Howardton
- Howe Terrace
- Hoyleton
- Hubbard
- Hubbard Woods
- Hubly
- Hudgens
- Hudson
- Huegely
- Huey
- Huffaker
- Huffmanville
- Hughes
- Hugo
- Hull
- Humboldt
- Humboldt Park
- Hume
- Humm Wye
- Humrick
- Hunt City
- Hunt Corners
- Hunter
- Huntington
- Huntley
- Huntsville
- Hurricane (historical)
- Hurst
- Hustle
- Hutchins Park
- Hutsonville
- Hutton
- Hyde Park
- Ida B Wells Housing Project
- Ideal
- Idlewild
- Idlewood
- Idylside
- Iles
- Illiana
- Illiana Heights
- Illiana (historical)
- Illinois
- Illinois City
- Illinois Park
- Illiopolis
- Imbs
- Ina
- Independence
- Indian Creek
- Indian Creek Country Estates
- Indian Creek Number 7 Election Precinct
- Indian Head Park
- Indian Hill
- Indian Oaks
- Indianola
- Indian Ridge
- Indian Spring
- Indian Village
- Industry
- Ingalls Park
- Ingalton
- Ingleside
- Ingleside Shore
- Ingraham
- Inlet
- Inman
- Innisfail
- Inverness
- Iola
- Iowa Junction
- Ipava
- Irene
- Irish Grove Number 4 Election Precinct
- Iron
- Irondale
- Irondale (historical)
- Ironworkers Addition to South Chicago
- Iroquois
- Iroquois County
- Irving
- Irving Park
- Irvington
- Irwin
- Irwins Park
- Isabel
- Island Grove
- Island Lake
- Island View
- Italian Bowery
- Itasca
- Iuka
- Ivanhoe
- Ivesdale
- Ivy
- Ivy Club of Northbrook
- Ivy Heights
- Jackson
- Jackson County
- Jackson Election Precinct
- Jackson Park Highlands
- Jackson Park Terrace
- Jacksonville
- Jacob
- Jalapa
- Jamaica
- Jamesburg
- Jamestown
- Jamestown (historical)
- Jane Addams Homes
- Janesville
- Jaques
- Jasper County
- Jefferson City
- Jefferson City (historical)
- Jefferson Corners
- Jefferson County
- Jefferson Election Precinct
- Jefferson Number 4 Election Precinct
- Jefferson Park
- Jefferson Township (historical)
- Jeffery Manor
- Jeisyville
- Jenkins
- Jerome
- Jersey County
- Jerseyville
- Jess
- Jessical Lane Subdivision
- Jewell Road
- Jewett
- Jimtown
- Jo Daviess County
- Joetta
- Johannisburg
- Johnsburg
- Johnson County
- Johnsonville
- Johnston City
- Johnstown
- Joliet
- Jones
- Jonesboro
- Jonesboro District Number 1 Election Precinct
- Jonesboro District Number 2 Election Precinct
- Jones Ridge
- Jonesville
- Joppa
- Joppa Junction
- Jordanville (historical)
- Joslin
- Joy
- Joy Prairie
- Judson (historical)
- Jules
- Julien Hill
- Junction
- Junction City
- Justice
- Kahm
- Kampenville
- Kampsville
- Kane
- Kane County
- Kaneland Estates
- Kaneville
- Kangley
- Kankakee
- Kankakee County
- Kansas
- Kaolin
- Kappa
- Karbers Ridge
- Karnak
- Karnak Election Precinct
- Kasbeer
- Kaser
- Kaskaskia
- Kaskaskia Election Precinct
- Katy Did
- Kaufman
- Kedron
- Kedron (historical)
- Keeler (historical)
- Keenes
- Keenesville
- Keeneyville
- Keensburg
- Kegley
- Keithsburg
- Kell
- Keller
- Kellerville
- Kelley Corners
- Kelleys
- Kellogg
- Kellyville
- Kelsey
- Kelvyn Grove
- Kemp
- Kemper
- Kempside
- Kempton
- Kendall County
- Kendall Hill
- Kenilworth
- Kennedy
- Kenner
- Kenney
- Kennicott Place
- Kensington
- Kent
- Kentland
- Kentucky
- Kenwood
- Keptown
- Kernan
- Kerrick
- Kewanee
- Keyesport
- Keyesport Landing
- Keys
- Kibbie
- Kickapoo
- Kidd
- Kidley
- Kilbourne
- Kildeer
- Killgubbin
- Kimberleigh
- Kincaid
- Kinchester Lane Subdivision
- Kinderhook
- King
- Kingdom
- Kingman
- Kings
- Kings Island
- Kings Mill
- Kingsport Court
- Kingston
- Kingston Mines
- Kinmundy
- Kinseys Little Farms
- Kinsman
- Kinswept Subdivision
- Kinzies Addition
- Kirkland
- Kirksville
- Kirkwood
- Kisch
- Kise Crossing
- Kishwaukee
- Kishwaukee Glen
- Kishwaukee Subdivision
- Kittredge
- Klines Corner
- Klondike
- Knapp
- Knob Hill
- Knoll Creek West
- Knollwood
- Knox
- Knox County
- Knoxville
- Koster
- Kritesville
- Kuhn Station
- Kumler
- Kyte Side Estates
- Lace
- La Clede
- Lacon
- La Crosse
- Ladd
- Lafayette
- La Fox
- La Grange
- La Grange Park
- La Harpe
- La Hogue
- Lake
- Lake Barrington
- Lake Bluff
- Lake Catherine
- Lake Charlotte
- Lake City
- Lake Corner
- Lake County
- Lake Creek
- Lake Crest
- Lake Estates
- Lake Forest
- Lake Fork
- Lake in the Hills
- Lake Ka-ho
- Lake Meadows
- Lakemoor
- Lake Number 1 Election Precinct
- Lake Number 2 Election Precinct
- Lake of the Woods
- Lake Park Estates
- Lake Piasa
- Lakeshire
- Lake Siding
- Lake Summerset
- Lakeview
- Lake View
- Lakeview Acres
- Lake View Highlands
- Lake Villa
- Lakewood
- Lakewood Estates
- Lakewood Shores
- Lake Zurich
- Lake Zurich Estates
- Lake Zurich Heights
- Lake Zurich Highlands
- Lake Zurich Manor
- Lamb
- La Moille
- Lamone Village
- Lanark
- Lancaster
- Lancaster Election Precinct
- Landes
- Landwehr Estates
- Lane
- Lane Acres
- Lane Park
- Lanesville
- Langham
- Langley
- Langleyville
- Lansing
- Lanton
- LaPlace
- La Prairie
- Larchland
- Larkdale
- La Rose
- La Rue
- La Salceda Subdivision
- La Salle
- La Salle County
- Latham
- Latham Park
- Latona
- Laura
- Laurette
- Lavergne
- La Vingnes Acres
- Lawler
- Lawndale
- Lawn Ridge
- Lawrence
- Lawrence County
- Lawrenceville
- Layfield
- Leaf River
- Leamington
- Leanderville
- Lebanon
- Leclaire
- LeClaire Courts
- Ledford
- Lee
- Lee Acres
- Lee Center
- Lee County
- Leeds
- Leesburg
- Leesville
- Lee Woods
- Lehigh
- Leisure City
- Leithton
- Leland
- Leland Grove
- Lemens
- Lementon
- Lemmon (historical)
- Lemont
- Lena
- Lenzburg
- Leonard
- Leon Corners
- Leonore
- L'Erable
- Lerna
- Le Roy
- Lester
- Level Acres
- Levelview Acres
- Leverett
- Levings
- Lewisburg
- Lewis Corner
- Lewistown
- Lexington
- Lexington (historical)
- Liberty
- Liberty Hill
- Libertyville
- Lick Creek
- Lick Creek Election Precinct
- Lick Prairie Election Precinct
- Lidice
- Lightsville
- Lilly
- Lillyville
- Lily Cache
- Lilydale
- Lily Lake
- Lilymoor
- Lima
- Limerick
- Lincoln
- Lincoln Election Precinct
- Lincoln Estates
- Lincoln Heights
- Lincoln Hills
- Lincoln Park
- Lincolnshire
- Lincoln Square (historical)
- Lincolnwood
- Lincolnwood Hills
- Lindberg Park
- Lindenhurst
- Linden Ridge
- Lindenwood
- Lindskolds Subdivision
- Lintner
- Linview
- Lipsey
- Lis
- Lisbon
- Lisbon Center
- Lisbon North
- Lisle
- Litchfield
- Literberry
- Literberry Election Precinct
- Lithia
- Little America
- Little Hell
- Little Indian
- Little Ireland (historical)
- Little Oklahoma
- Little Orchard Subdivision
- Little Rock
- Little Rock (historical)
- Little Sicily
- Littleton
- Littleville (historical)
- Little York
- Lively Grove
- Liverpool
- Livingston
- Livingston County
- Lloyd Whale Subdivision
- Loami
- Lochanora
- Lockhaven
- Lockport
- Locks
- Locust Grove (historical)
- Loda
- Lodemia
- Lodge
- Logan
- Logan County
- Logan Election Precinct
- Logansburgh (historical)
- Logansport (historical)
- Logan Square
- Log Cabin Camp
- Lomax
- Lombard
- Lombard Tree
- Lombardville
- London Mills
- Lonesome Acres
- Lone Tree
- Lone Tree Corners
- Lone Tree Subdivision
- Long Branch
- Long Creek
- Long Grove
- Long Grove Valley
- Long Lake
- Long Point
- Long Shore Park
- Longview
- Longview Estates
- Longview Place
- Loogootee
- Loon Lake
- Loose Pulley Junction
- Loraine
- Loran
- Lorenzo
- Loretto
- Lori-Sue Subdivision
- Lostant
- Lost Nation
- Lotus
- Lotus Woods
- Louisville
- Love
- Loveland's Subdivision
- Loves Corner
- Loves Park
- Lovilla
- Lovington
- Lowder
- Lowell
- Lower West Side
- Low Point
- Loxa
- Loyd
- Lucas
- Ludlow
- Lumaghi Heights
- Lusk
- Luther
- Lynchburg (historical)
- Lyndon
- Lynn Center
- Lynnville
- Lynnville Election Precinct
- Lynwood
- Lyons
- Mabel
- Macedonia
- Machesney Park
- Mackinaw
- Mackinaw Dells
- Mackville
- Macomb
- Macon
- Macon County
- Macoupin
- Macoupin County
- Madison
- Madison County
- Madison Station
- Madonnaville
- Maeystown
- Magnet
- Magnolia
- Magnolia Corner
- Mahomet
- Maizetown
- Makanda
- Malden
- Mallard Creek
- Mallard Lake North
- Mallard Lake South
- Malta
- Malvern
- Mammoth Springs
- Manchester
- Manchester Election Precinct
- Mandell
- Manhattan
- Manito
- Manley
- Manlius
- Mannon
- Mansfield
- Manteno
- Manus North Shore Estates
- Manville
- Maple
- Maple Grove
- Maple Leaf Estates
- Maple Park
- Maple Point
- Maple Ridge
- Maples Mill
- Mapleton
- Maplewood
- Maplewood Courts
- Maplewood Park
- Maquon
- Marblehead
- Marbletown
- Marcelline
- Marcoe
- Marcus
- Marden Estates
- Marengo
- Marietta
- Marigold
- Marine
- Marion
- Marion County
- Marissa
- Mark
- Markham
- Markham City
- Markham Election Precinct
- Markus Subdivision
- Marlen Subdivision
- Marley
- Marlow
- Maroa
- Marquette
- Marquette Heights
- Marquette Manor
- Marseilles
- Marshall
- Marshall County
- Marshall Field Garden Apartments
- Marshall Landing
- Marston
- Martin (historical)
- Martin Luther
- Martinsburg
- Martinsville
- Martinton
- Marydale
- Maryland
- Maryland Place
- Maryland Subdivision
- Mary Meadows
- Maryville
- Marywood
- Mascoutah
- Mason
- Mason City
- Mason County
- Massac City
- Massac County
- Massbach
- Matanzas
- Matanzas Beach
- Matherville
- Matteson
- Matthews
- Matthews Junction
- Mattoon
- Maud
- Maunie
- Maxwell
- Maxwell (historical)
- Mayberry
- Mayfair
- Mays
- Maysville
- Maytown
- Mayview
- Maywood
- Maywood Manor
- Mazon
- Mazonia
- McCall
- McClay Orchard
- McClure
- McClure Election Precinct
- McClusky
- McConnell
- McCook
- McCormick
- McCormick Place
- McCormickville
- McCown
- McCulley Subdivision
- McCullom Lake
- McDonough County
- McDowell
- McFarlan Election Precinct
- McGirr
- McHenry
- McHenry County
- McHenry Shores
- McIntosh Settlement (historical)
- McKeen
- McKinley
- McKinley Park
- McLean
- McLean County
- McLeansboro
- McNabb
- McNulta
- McQueen
- McVey
- Meadowbrook
- Meadow Green
- Meadow Heights
- Meadowridge
- Meadows
- Meadowview
- Mechanicsburg
- Media
- Medinah
- Medora
- Meeks
- Melody
- Melrose
- Melrose Park
- Melugin Grove (historical)
- Melville
- Melvin
- Melwood
- Menard
- Menard County
- Mendon
- Mendota
- Menominee
- Meppen
- Mercer County
- Meredith
- Meredosia
- Meriden
- Mermet
- Merna
- Merriam
- Merrimac
- Merrionette Manor
- Merrionette Park
- Merritt
- Merritt Election Precinct
- Metamora
- Metcalf
- Metropolis
- Metropolis Number 1 Election Precinct
- Metropolis Number 2 Election Precinct
- Metropolis Number 3 Election Precinct
- Metropolis Number 4 Election Precinct
- Mettawa
- Mexico
- Meyer
- Meyer's Subdivision
- Michael
- Michealsen Subdivision
- Michigan Beach
- Mid City (historical)
- Middlebury
- Middlecreek
- Middle Creek
- Middlegrove
- Middlepoint
- Middlesworth
- Middleton
- Middletown
- Midland City
- Midlothian
- Mid-North District
- Midway
- Midway (historical)
- Milan
- Mildred
- Miles Station
- Milford
- Milla
- Millbrig (historical)
- Millbrook
- Millburn
- Mill Creek
- Mill Creek Election Precinct
- Milledgeville
- Miller
- Miller City
- Miller Election Precinct
- Millersburg
- Millersville
- Millhurst
- Millington
- Millsdale
- Mill Shoals
- Mills Prairie (historical)
- Millstadt
- Millstadt Junction
- Millville
- Milmine
- Milne
- Milo
- Milroy
- Milton
- Mindale
- Mineral
- Mineral City (historical)
- Mineral Springs (historical)
- Minier
- Minonk
- Minooka
- Mira
- Missal
- Missionfield
- Mission Hills Estates
- Mitchell
- Mitchells Subdivision
- Mitchellsville
- Mitchie
- Mobil-Land Trailer Park
- Moccasin
- Mode
- Modena
- Modesto
- Modoc
- Moellenbrocks
- Mokena
- Moline
- Momence
- Monaville
- Monee
- Monica
- Monmouth
- Monroe Center
- Monroe City
- Monroe County
- Monroe Election Precinct
- Montclare
- Monterey
- Montezuma
- Montgomery
- Montgomery County
- Monticello
- Montrose
- Mont Station
- Moonshine
- Moorefield Estates
- Moores Corner
- Moores (historical)
- Mooseheart
- Moran Corners
- Morea
- Morehaven
- Moreland
- Morgan City (historical)
- Morgan County
- Morgan Park
- Morganville
- Moriah
- Moro
- Moronts
- Morrelville
- Morris
- Morris Kennedy Subdivision
- Morrison
- Morrisonville
- Morristown
- Morristown (historical)
- Morse
- Morseville
- Mortimer
- Morton
- Morton Grove
- Moscow
- Moscow (historical)
- Mossville
- Motor Heights
- Moultrie County
- Mound City
- Mound City Election Precinct
- Mounds
- Mounds Election Precinct
- Mountain Glen
- Mount Auburn
- Mount Carbon
- Mount Carmel
- Mount Carmel Election Precinct
- Mount Carroll
- Mount Clare
- Mount Erie
- Mount Fulcher
- Mount Greenwood
- Mountjoy
- Mount Morris
- Mount Olive
- Mount Palatine
- Mount Pleasant
- Mount Prospect
- Mount Pulaski
- Mount Sterling
- Mount Vernon
- Mount Zion
- Moweaqua
- Mozier
- Mozier Landing
- Muddy
- Mulberry Grove
- Mulford Highlands
- Mulkeytown
- Muncie
- Mundelein
- Munger
- Munson (historical)
- Munster
- Murdock
- Murphysboro
- Murrayville
- Mutimer Subdivision
- Myersville (historical)
- Mylith Park
- Myrtle
- Nachusa
- Nameoki
- Naperville
- Naplate
- Naples
- Naples-Bluffs Election Precinct
- Narita
- Nashville
- Nason
- National City
- Native Prairie
- Natrona
- Nauvoo
- Neadmore
- Neal
- Near North Side
- Near South Side
- Nearwest Side
- Nebo
- Neilson
- Nekoma
- Nelson
- Neoga
- Neponset
- Nettle Creek
- Neunert
- Nevada
- Nevins
- Newark
- New Athens
- New Athens (historical)
- New Auburn
- New Baden
- New Bedford
- New Berlin
- Newbern
- New Boston
- Newburg
- New Burnside
- Newby
- New Canton
- Newcastle
- New Castle (historical)
- New City
- New Columbia
- New Delhi
- New Dennison
- New Douglas
- Newell
- New Grand Chain
- New Hanover
- New Hartford
- New Haven
- New Hebron
- New Holland
- New Hope
- New Hope (historical)
- New Lancaster (historical)
- New Lebanon
- New Lenox
- New Liberty
- New London (historical)
- Newman
- Newmansville
- New Market (historical)
- New Massillon (historical)
- New Memphis
- New Memphis Station
- New Michigan (historical)
- New Milford
- New Minden
- New Palestine
- New Patch
- New Philadelphia
- Newport
- New Salem
- New Salem (historical)
- Newton
- Newton Corners
- Newtown
- New Windsor
- Niantic
- Niles
- Nilwood
- Niota
- Nipper Corner
- Noble
- Nokomis
- Noltings
- Nora
- Norma
- Normal
- Normandy
- Normandy Heights
- Normandy Hill
- Normantown
- Norridge
- Norris
- Norris City
- North Alton
- North Aurora
- North Barrington
- Northbrook
- Northbrook Acres
- Northbrook Colonial Estates
- Northbrook East
- Northbrook Estates
- Northbrook Gardens
- Northbrook Glen
- Northbrook Greens
- Northbrook Heights
- Northbrook Highlands
- Northbrook Manor
- Northbrook Mews
- Northbrook Oaks
- Northbrook Park
- Northbrook Villa
- Northbrook West
- North Caledonia (historical)
- North Center
- North Chicago
- North Chillicothe
- North Dupo
- North Edgewater
- North Englewood
- North Evanston
- Northfield
- Northfield Acres
- Northfield Woods
- Northgate
- North Glen Ellyn
- North Hampton
- North Hanover
- North Harbor
- North Harvey
- North Henderson
- North Hooper
- Northlake
- North Lawndale
- Northmeadow Village Trailer Park
- North Mounds
- North Northfield
- North Park
- North Pekin
- North Peoria
- North Plato
- North Pointe
- North Prairie Acres
- North Pullman
- North Quincy
- Northridge
- North Riverside
- North Shore
- North Shoreline
- North Venice
- Northville
- Northway
- North Wind
- Northwood Edens
- Nortonville
- Nortonville Election Precinct
- Norway
- Norwood
- Notre Dame
- Nottingham Manor
- Nottingham Woods
- Novak Park
- Nutwood
- Oak
- Oak Brook
- Oakbrook Estates Mobile Home Park
- Oakbrook Terrace
- Oakcrest
- Oakdale
- Oakenwald
- Oakford
- Oakford Number 9 Election Precinct
- Oak Forest
- Oakglen
- Oak Grove
- Oak Hill
- Oak Hills
- Oakland
- Oakland Center
- Oak Lawn
- Oakley
- Oak Openings
- Oak Park
- Oak Point
- Oak Ridge
- Oak Ridge North
- Oak Run
- Oakton
- Oakwood
- Oakwood Heights
- Oakwood Hills
- Oasis Mobile Home Park
- Oasis Trailer Park
- Obed
- Oblong
- Oconee
- Ocoya
- Odell
- Odgen
- Odin
- O'Fallon
- Ogden
- Ogle
- Ogle County
- Ogles
- Oglesby
- Ohio
- Ohlman
- Oil Center
- Oilfield
- Oil Grove
- Okawville
- Old Brownfield
- Old Colony Court
- Old Du Quoin
- Oldenburg
- Old Gilchrist
- Old Kane
- Old Kaskaskia
- Old Marissa
- Old Mill Creek
- Old Mill Grove
- Old Niota
- Old Pearl
- Old Princeton
- Old Ripley
- Old Salem Chautauqua
- Old Shawneetown
- Old State Mobile Home Village
- Old Stonington
- Oldtown
- Olena
- Olga
- Olin
- Olive Branch
- Olive Branch Election Precinct
- Oliver
- Oliver Lane Subdivision
- Olivet
- Olmsted
- Olmsted Election Precinct
- Olney
- Olsen-Hansen Row Houses
- Olson's Subdivision
- Olympia Fields
- Omaha
- Omar
- Omega
- Onarga
- Oneco
- Oneida
- Ontario
- Ontarioville
- Opdyke
- Ophiem
- Oquawka
- Orange
- Orangemans Hall
- Orange Prairie
- Orangeville
- Oraville
- Orchard Subdivision
- Orchardville
- Oreana
- Oregon
- Orient
- Orio
- Orion
- Orland Hills
- Orland Park
- Orleans
- Ormonde
- Osbernville
- Osborn
- Osceola
- Osco
- Oskaloosa
- Osman
- Ospur
- Oswego
- Ottawa
- Otter (historical)
- Otterville
- Otto
- Otto (historical)
- Ottville
- Oury Point
- Owaneco
- Owen Center
- Oxford (historical)
- Oxville
- Ozark
- Ozark Election Precinct
- Pacific Junction
- Packingtown
- Paderborn
- Padua
- Paineville
- Paisley Corners
- Palatine
- Palermo
- Palestine
- Palestine Election Precinct
- Palisades
- Palm Beach
- Palmer
- Palmerton
- Palm Garden Mobile Home Park
- Palmyra
- Paloma
- Palos Heights
- Palos Hills
- Palos Park
- Palzo
- Pana
- Panama
- Pankeyville
- Panola
- Panorama Hills
- Panorama Valley
- Papineau
- Paradise
- Paris
- Park City
- Parker
- Parkersburg
- Park Estates Mobile Home Park
- Park Forest
- Park Hill
- Parkland
- Park Manor
- Park Place Estates of Northbrook
- Park Ridge
- Park Row
- Parkside
- Parkview
- Parkville
- Parnell
- Parrish
- Pasfield
- Passport
- Patoka
- Patterson
- Patterson Springs
- Patton
- Pattonsburg
- Pauline
- Paulton
- Pavillion
- Pawnee
- Pawnee Junction
- Paw Paw
- Paxton
- Paynes Point
- Payson
- Paytonville
- Peabody
- Pearl
- Pearl City
- Pebble Beach
- Pecatonica
- Pegram
- Pekin
- Pekin Heights
- Pellville
- Penfield
- Pennington Point
- Pennock
- Penrose
- Peoria
- Peoria County
- Peoria Heights
- Peotone
- Pepper Tree
- Percy
- Percy Election Precinct
- Perdueville
- Perkins (historical)
- Perks
- Perks Election Precinct
- Perry
- Perry County
- Perryville
- Pershing
- Peru
- Pesotum
- Petersburg
- Petersburg East Number 13 Election Precinct
- Petersburg North Number 14 Election Precinct
- Petersburg South Number 15 Election Precinct
- Petersburg West Number 16 Election Precinct
- Peters Creek
- Peterstown
- Petersville
- Peterville
- Petrolia
- Pharoahs Gardens
- Pheasant Creek
- Pheasant Knolls
- Pheasant Run
- Phelps
- Philadelphia
- Philip Murray Homes
- Phillipstown
- Philo
- Phoenix
- Piankashawtown (historical)
- Piasa
- Piasa Hills
- Piatt
- Piatt County
- Picardy Circle
- Pierceburg
- Pierces Park
- Pierron
- Pierson
- Pigeon (historical)
- Pike
- Pike County
- Pilot Center (historical)
- Pilsen
- Pinckneyville
- Pinckneyville Number 1 Election Precinct
- Pinckneyville Number 2 Election Precinct
- Pinckneyville Number 3 Election Precinct
- Pinckneyville Number 4 Election Precinct
- Pinckneyville Number 5 Election Precinct
- Pinckneyville Number 6 Election Precinct
- Pinckneyville Number 7 Election Precinct
- Pinckneyville Number 8 Election Precinct
- Pine Grove
- Pinehurst Manor
- Pine Lake Circle
- Pine Manor
- Pine Meadow Estates
- Pine Valley
- Pine View
- Pingree Grove
- Pinhook (historical)
- Pinkstaff
- Pioneer
- Piopolis
- Piper City
- Pisgah
- Pisgah Election Precinct
- Pistakee
- Pistakee Highlands
- Pitcherville (historical)
- Pitchin
- Pittsburg
- Pittsfield
- Pittwood
- Placerdale
- Plainfield
- Plainview
- Plainville
- Plano
- Plato Center
- Plato Corners
- Plattville
- Pleak
- Pleasant Grove
- Pleasant Hill
- Pleasant Hill (historical)
- Pleasant Mound
- Pleasant Plains
- Pleasant Ridge
- Pleasant Ridge (historical)
- Pleasant Valley
- Pleasant View
- Plumfield
- Plum Grove Village
- Plum Hill
- Plymouth
- Poag
- Pocahontas
- Pohaten (historical)
- Point Election Precinct
- Point Pleasant
- Polk
- Polo
- Polsgrove
- Pomona
- Pond
- Ponds
- Ponemah
- Pontiac
- Pontoon Beach
- Pontoosuc
- Pope County
- Poplar City
- Poplar Grove
- Poplar Ridge
- Portage
- Portage Park
- Port Barrington
- Port Byron
- Porterfield
- Porters Glenview Subdivision
- Porter Subdivision
- Porterville
- Port Jackson
- Portland
- Portuguese Hill
- Posen
- Posey
- Post Oak
- Potomac
- Pottstown
- Pottsville
- Poverty Ridge
- Poverty Row
- Powellton
- Powerton
- Prairie
- Prairie Avenue Courts
- Prairie Center
- Prairie City
- Prairie Courts
- Prairie Creek
- Prairie du Rocher
- Prairie du Rocher Election Precinct
- Prairie Grove
- Prairie Hall
- Prairie Shores
- Prairietown
- Prairie View
- Prairieview Estates
- Prairieville
- Pratt (historical)
- Precinct 10 Election Precinct
- Precinct 11 Election Precinct
- Precinct 12 Election Precinct
- Precinct 13 Election Precinct
- Precinct 15 Election Precinct
- Precinct 16 Election Precinct
- Precinct 17 Election Precinct
- Precinct 18 Election Precinct
- Precinct 19 Election Precinct
- Precinct 1 Election Precinct
- Precinct 20 Election Precinct
- Precinct 21 Election Precinct
- Precinct 22 Election Precinct
- Precinct 23 Election Precinct
- Precinct 2 Election Precinct
- Precinct 3 Election Precinct
- Precinct 4 Election Precinct
- Precinct 5 Election Precinct
- Precinct 6 Election Precinct
- Precinct 7 Election Precinct
- Precinct 8 Election Precinct
- Precinct 9 Election Precinct
- Preemption
- Prentice
- Prentice Election Precinct
- Preston
- Prestonfield
- Preston Heights
- Prince Crossing
- Princeton
- Princeville
- Proctor
- Prophetstown
- Prospect
- Prospect Heights
- Prospect Heights Addition
- Prouty
- Providence
- Pruett
- Pryortown
- Puder
- Pulaski
- Pulaski County
- Pulaski Election Precinct
- Pullman
- Pureton
- Putnam
- Putnam County
- Pyatts
- Pyramid
- Quail Run
- Quaker (historical)
- Quashquema (historical)
- Quatoga Bluff
- Quentin Corners
- Quincy
- Quincy Junction
- Quiver Beach
- Raddle
- Radford
- Radley
- Radom
- Radville
- Rafetown
- Ragtown (historical)
- Rainbow Hills
- Raleigh
- Rambling Hills
- Rambling Hills East
- Rambling Hills West
- Ramsey
- Ramsey Acres
- Ramsgate South
- Randall Hills
- Randolph
- Randolph County
- Rankin
- Ransom
- Rantoul
- Rapatee
- Rapids City
- Rardin
- Raritan
- Raum
- Raven
- Ravens Wing
- Ravenswood
- Ravenswood Gardens
- Ravenswood Manor
- Ravenswood Place
- Ravinia
- Ravinia Park
- Rawalts
- Rawson Bridge
- Ray
- Raymond
- Raynor Park
- Rayville
- Reader
- Reading
- Reardon
- Rectorville (historical)
- Red Bud
- Red Bud Election Precinct
- Red Bud (historical)
- Reddick
- Reddish
- Redgate Ridge
- Red Haw Ridge
- Redmon
- Red Oak
- Red Top
- Reed Crossing
- Reeds
- Reeds Crossing (historical)
- Reeds Station
- Rees
- Reevesville
- Regency Place
- Reilly
- Reily Lake
- Renault
- Rend City
- Rennerville
- Reno
- Renshaw
- Rentchler
- Resthaven
- Reynolds
- Reynoldsburg
- Reynoldsville
- Rice
- Richards
- Richardson
- Richards Park
- Richfield
- Richland
- Richland County
- Richmond
- Richton Park
- Richview
- Richwood Election Precinct
- Richwoods
- Riddle Hill
- Riddleville
- Ridgecrest
- Ridgecroft
- Ridge Farm
- Ridgefield
- Ridgeland
- Ridgely
- Ridgeville
- Ridgewood
- Ridgway
- Ridgway Precinct
- Ridott
- Ridott Corners
- Riehl
- Riffle
- Riggston
- Riley
- Rileyville
- Rinard
- Ringwood
- Rio
- Ripley
- Rising
- Rising Sun
- Risk
- Ritchie
- River
- Riverdale
- River Forest
- River Grange Lakes
- River Grove
- Riverside
- Riverside Mobile Home Estates
- Riverstream
- Riverton
- Riverview
- Riverwoods
- Roaches
- Roachtown
- Roanoke
- Robbins
- Robbs
- Robein
- Robert Brooks Homes
- Roberts
- Robert Taylor Homes
- Robinson
- Robinwood
- Roby
- Rochelle
- Rochester
- Rock
- Rockbridge
- Rock City
- Rock Creek
- Rock Creek Number 12 Election Precinct
- Rockdale
- Rockdale Junction
- Rockefeller
- Rock Election Precinct
- Rock Falls
- Rockford
- Rock Grove
- Rock Island
- Rock Island County
- Rockport
- Rock Run Park
- Rockton
- Rockwood
- Rockwood Election Precinct
- Rodden
- Rodemich
- Rodgersville
- Rogers Park
- Rohrer
- Roland
- Rolling Green
- Rolling Greens Mobile Home Park
- Rolling Meadows
- Rollins
- Rollo
- Rombury Oaks
- Rome
- Romeo
- Romeoville
- Rondout
- Roodhouse
- Rooks Creek
- Roots
- Rosamond
- Roscoe
- Rosebud
- Rosecrans
- Rosedale
- Rose Hill
- Rose Lake
- Roseland
- Roselle
- Rosemont
- Roseville
- Rosewood Heights
- Rosiclare
- Rosiclare Precinct
- Roslyn
- Rossville
- Rossville Junction
- Roth
- Round Grove
- Round Knob
- Round Lake
- Round Lake Beach
- Round Lake Heights
- Round Lake Park
- Round Prairie
- Rowe
- Rowell
- Roxana
- Roxbury
- Royal
- Royal Acres Trailer Park
- Royal Court
- Royal Heights
- Royal Lake
- Royal Lake Resort
- Royal Ridge
- Royalton
- Rozenow's Subdivision
- Rozetta
- Ruark
- Ruby
- Rudement
- Rue Vallee
- Ruffled Feathers Golf Community
- Rugby
- Rugen Subdivision
- Ruma
- Ruma Election Precinct
- Rumpler
- Rural Hill
- Rushville
- Russell
- Russellville
- Rust
- Rustic Acres
- Rutherford
- Rutland
- Ryan
- Sabina
- Sacramento
- Saddlewood
- Sadorus
- Sag Bridge
- Saidora
- Sailor Springs
- Saint Anne
- Saint Anne Woods
- Saint Augustine
- Saint Charles
- Saint Clair County
- Saint David
- Saint Elmo
- Sainte Marie
- Saint Francisville
- Saint George
- Saint Jacob
- Saint James
- Saint Joe
- Saint Johns
- Saint Joseph
- Saint Libory
- Saint Mary
- Saint Morgan
- Saint Paul
- Saint Peter
- Saint Rose
- Saint Stephens Green
- Saint Thomas
- Salceca North
- Salem
- Salem 1 Election Precinct
- Salem 2 Election Precinct
- Salina
- Saline
- Saline City
- Saline County
- Saline Landing
- Saline Valley Store (historical)
- Salisbury
- Saluda
- Samoth
- Samsville
- Samuel A Rothermel Houses
- Samuelson Corners
- Sand Barrens
- Sandburn
- Sanders Crossing
- Sanders Estates
- Sanders Prairie
- Sandersville
- Sandoval
- Sand Ridge
- Sandridge Number 8 Election Precinct
- Sands
- Sandusky
- Sandusky Election Precinct
- Sandwich
- Sanfordville (historical)
- Sangamon
- Sangamon County
- San Jose
- Sankoty
- Saratoga
- Saratoga Center
- Saratoga Election Precinct
- Sato
- Sauganash
- Sauget
- Sauk Village
- Saunders
- Saunemin
- Savage (historical)
- Savanna
- Savoy
- Sawyerville
- Saxon (historical)
- Saybrook
- Scales Mound
- Scarboro
- Schaeferville
- Schapville
- Schaufel Corners
- Schaumburg
- Scheller
- Schick
- Schiller Park
- Schnell
- Schnells Corner
- Schoper
- Schorsch
- Schram City
- Schrodts Station
- Schrum
- Schuline
- Schultz's Subdivision
- Schuyler County
- Schwer
- Sciota
- Scioto Mills
- Scott County
- Scottland
- Scotts
- Scottsburg
- Scotts Mill
- Scottsville
- Scottville
- Scovel
- Scraper-Moecherville
- Seaton
- Seatonville
- Sebastopol
- Secor
- Seehorn
- Sefton
- Sellers
- Selma (historical)
- Selmaville
- Seminary
- Seneca
- Sepo
- Serena
- Sesser
- Seville
- Seward
- Sexson Corner
- Seymour
- Shabbona
- Shabbona Grove
- Shadow Lawn
- Shady Acres
- Shady Beach
- Shady Grove
- Shafter
- Shakerag
- Shale Bluff
- Shale City
- Shamrock
- Shanghai City
- Shannon
- Shantytown
- Sharpsburg
- Shasta (historical)
- Shattuc
- Shaw
- Shawneetown
- Shaws
- Sheffield
- Shelburn (historical)
- Shelby 1 Election Precinct
- Shelby 2 Election Precinct
- Shelby County
- Shelbyville
- Sheldon
- Sheldons Grove
- Shepardson Subdivision
- Shepherd
- Sherburnville
- Sheridan
- Sheridan Estates
- Sherman
- Sherman Corners
- Shermer Ridge
- Shermer Square
- Shermerville
- Sherrard
- Sherwood Oaks
- Shetlerville
- Shields
- Shiloh
- Shiloh Hill
- Shiloh Station
- Shinn
- Shipman
- Shirland
- Shirley
- Shobonier
- Shokokon
- Shoo Fly
- Shop Creek
- Shorewood
- Shumway
- Sibley
- Sicily
- Sidell
- Sidney
- Siemar Subdivision
- Sigel
- Signal Hill
- Silent Meadow
- Siloam
- Silver Glen Meadows
- Silver Hills
- Silver Lake
- Silver Lake (historical)
- Silvis
- Simons
- Simpson
- Simpson Election Precinct
- Sims
- Sinclair
- Six Corners
- Skare Estates
- Skelton
- Skiersch's Subdivision
- Ski Hill
- Skokie
- Skokie Highlands
- Skokie Junction
- Skokie Manor
- Slackwater (historical)
- Sleepy Hollow
- Sloan
- Sloan Station
- Slocum Corners
- Smithboro
- Smithdale
- Smithfield
- Smithshire
- Smithton
- Smithville
- Smothersville
- Snearlyville
- Snicarte
- Snider
- Snyder
- Solar Grove
- Sollitt
- Solomon
- Solon Mills
- Somerset
- Somonauk
- Sonora (historical)
- Soperville
- Sorento
- South Addison
- South Barrington
- South Beloit
- South Branch Addition
- Southbridge Commons
- South Brighton
- South Chicago
- South Chicago Heights
- South Commons
- South Crest
- South Danville
- South Deering
- South Edgewater
- South Elgin
- South Elkhorn
- South Elmhurst
- South Englewood
- Southern Hills
- Southern View
- South Evanston
- South Freeport
- Southgate
- Southgate Estates Trailer Park
- South Harvey
- South Holland
- South Jacksonville
- South Kenwood
- Southland Acres
- Southlawn
- South Lawndale
- South Lockport
- South Lynn
- Southmoor
- Southmore Heights
- South Ottawa (historical)
- South Park
- South Park Terrace
- South Paw Paw
- South Pekin
- South Pole
- Southport
- South Rome
- South Roxana
- South Shore
- South Strasburg
- South Streator
- South Wilmington
- Spankey
- Sparks Hill
- Sparland
- Sparta
- Sparta Election Precinct
- Spaulding
- Spaulding Corners
- Speer
- Spencer
- Spencer Heights
- Spillertown
- Spires
- Split Rail Farm
- Sportmans Cove
- Spring Bay
- Spring Creek Settlement (historical)
- Springer Station
- Springerton
- Springfield
- Spring Garden
- Spring Green
- Spring Grove
- Spring Grove (historical)
- Spring Hill
- Spring Lake Mobile Home Park
- Spring Valley
- Springville
- Squires
- Stagecoach Hills
- Stagecoach Junction
- Staley
- Stallings
- Standard
- Standard City
- Stanford
- Staples Corner
- Star City
- Stark
- Stark County
- Starks
- Starne
- Star Subdivision
- State Park Place
- State Road
- Stateway Gardens
- Staunton
- Stavanger
- Steel City
- Steele
- Steeleville
- Steeleville Election Precinct
- Steeleville Precinct
- Steelton
- Steger
- Stelle
- Stephenson County
- Sterling
- Sterling Place
- Steward
- Stewardson
- Stewardsville (historical)
- Stewart Ridge
- Stickney
- Stillman Valley
- Still Meadows
- Stillwell
- Stiritz
- Stockdale
- Stockland
- Stockton
- Stoehrs
- Stokes
- Stokes Election Precinct
- Stolle
- Stolletown
- Stonebrook
- Stonebrook East
- Stone Church
- Stone Church Election Precinct
- Stonefort
- Stone Fort
- Stonegate
- Stone Hedge
- Stonehedge Glen
- Stone Hedge Manor
- Stone Park
- Stoneyville
- Stonington
- Stony Island
- Stony Island Heights
- Stoy
- Strasburg
- Stratford
- Stratton
- Straut
- Strawn
- Strawns Crossing
- Streadle
- Streamwood
- Streator
- Streeterville
- Stringtown
- Stronghurst
- Stubblefield
- Sturbridge Village
- Sturm Subdivision
- Sublette
- Sudduth (historical)
- Sugar Creek Ranch
- Sugar Grove
- Sugar Grove Number 5 Election Precinct
- Sugar Island
- Sugarloaf Heights
- Sullivan
- Sullivan Center (historical)
- Sulphur Springs
- Sulphur Springs (historical)
- Summerdale
- Summerfield
- Summerhill
- Summer Hill
- Summersville
- Summerville
- Summit
- Summum
- Sumner
- Sunbeam
- Sunbury
- Sunfield
- Sunfield Election Precinct
- Sunny Acres
- Sunnybrook Meadows
- Sunny Crest
- Sunny Hill
- Sunny Hill Estates
- Sunnyland
- Sunnyside
- Sunridge
- Sunrise Hills
- Sunrise Ridge
- Sun River Terrace
- Sunset Court
- Sunset Fields
- Sunset Harbor
- Sunset View Estates
- Sunset Villa
- Surrey
- Surrey Woods
- Sutter
- Sutton
- Sutton Point
- Swan Creek
- Swansea
- Swansway
- Swanwick
- Swanwick Election Precinct
- Swedentown
- Swede Town
- Swedona
- Sweet Home (historical)
- Sweet Water
- Swift
- Swygert
- Sycamore
- Sycamore Lane
- Sylvan (historical)
- Sylvan Lake
- Sylvan Woods
- Symerton
- Table Grove
- Tabor
- Talbott
- Tallmadge
- Tall Oaks
- Tall Oaks Subdivision
- Tall Trees
- Tallula
- Tallula Number 11 Election Precinct
- Tamalco
- Tamarack
- Tamara Heights
- Tamaroa
- Tamaroa Number 1 Election Precinct
- Tamaroa Number 2 Election Precinct
- Tamms
- Tamms Election Precinct
- Tampico
- Tanglewood
- Tankville
- Tanner Woods
- Tansill
- Tatumville
- Taylor
- Taylor Hill
- Taylor Ridge
- Taylors Addition to South Chicago
- Taylor Springs
- Taylorville
- Tazewell
- Tazewell County
- Techny (historical)
- Tedens (historical)
- Teheran
- Temple Hill
- Tennessee
- Terra Cotta
- Terre Haute
- Teutopolis
- Texas City
- Texas Junction
- Texico
- Thackeray
- Thawville
- Thayer
- Thebes
- Thebes Election Precinct
- The Burg
- The Bush
- The Colonnades
- The Commons
- The Cottage
- The Courts
- The Crossroads
- The Grove
- The Hall
- The Knolls
- The Landings
- The Meadows
- The Meadows of Virgil
- The Orchards
- The Willows
- The Woodland
- Third Lake
- Thomas
- Thomasboro
- Thomasville
- Thompsonville
- Thomson
- Thorne Ledge
- Thornfield
- Thorn Hill
- Thornley
- Thornton
- Thornton Junction
- Thurber
- Tiber Hill Estates
- Tice
- Ticona
- Tiffany Estates
- Tilden
- Tilden Election Precinct
- Tillman
- Tilton
- Timbercrest
- Timberlane
- Timber Lane
- Timber Ridge
- Timber Ridge Mobile Home Park
- Timber Trails
- Time
- Timewell
- Timmons
- Timothy
- Tinley Park
- Tioga
- Tipton
- Tiskilwa
- Tison
- Titus
- Todds Mill
- Todds Point
- Toledo
- Tolono
- Toluca
- Tomahawk Bluff
- Tomlinson
- Toms Prairie
- Tonica
- Tonti
- Topeka
- Torino
- Toronto
- Toulon
- Tovey
- Tovey Humphrey Station
- Towanda
- Tower Heights
- Tower Hill
- Tower Lake
- Towertown
- Towne Oaks
- Township of Abington
- Township of Adams
- Township of Addison
- Township of Aetna
- Township of Afton
- Township of Akron
- Township of Alba
- Township of Albany
- Township of Alden
- Township of Algonquin
- Township of Alhambra
- Township of Allen
- Township of Allens Grove
- Township of Allin
- Township of Allison
- Township of Alma
- Township of Alto
- Township of Alton
- Township of Amboy
- Township of Amity
- Township of Anchor
- Township of Andalusia
- Township of Anderson
- Township of Andover
- Township of Annawan
- Township of Antioch
- Township of Appanoose
- Township of Apple River
- Township of Arcola
- Township of Arenzville
- Township of Arispie
- Township of Aroma
- Township of Arrington
- Township of Arrowsmith
- Township of Artesia
- Township of Asbury
- Township of Ash Grove
- Township of Ashkum
- Township of Ashland
- Township of Ashley
- Township of Ashmore
- Township of Ashton
- Township of Assumption
- Township of Astoria
- Township of Athensville
- Township of Atkinson
- Township of Atlanta
- Township of Atlas
- Township of Auburn
- Township of Audubon
- Township of Augusta
- Township of Aurora
- Township of Austin
- Township of Aux Sable
- Township of Avena
- Township of Avoca
- Township of Avon
- Township of Ayers
- Township of Bainbridge
- Township of Bald Bluff
- Township of Bald Hill
- Township of Ball
- Township of Banner
- Township of Barnett
- Township of Barnhill
- Township of Barr
- Township of Barren
- Township of Barrington
- Township of Barry
- Township of Batavia
- Township of Bath
- Township of Bear Creek
- Township of Beardstown
- Township of Bear Grove
- Township of Beaucoup
- Township of Beaver
- Township of Beaver Creek
- Township of Beaverville
- Township of Bedford
- Township of Belle Prairie
- Township of Belleville
- Township of Bellflower
- Township of Bell Plain
- Township of Belmont
- Township of Belvidere
- Township of Bement
- Township of Bennington
- Township of Benton
- Township of Berlin
- Township of Bernadotte
- Township of Berreman
- Township of Berry
- Township of Berwick
- Township of Berwyn
- Township of Bethel
- Township of Beverly
- Township of Bible Grove
- Township of Big Grove
- Township of Biggsville
- Township of Big Mound
- Township of Big Rock
- Township of Big Spring
- Township of Bird
- Township of Birmingham
- Township of Bishop
- Township of Blackberry
- Township of Blackhawk
- Township of Blair
- Township of Blandinsville
- Township of Blissville
- Township of Bloom
- Township of Bloomfield
- Township of Bloomingdale
- Township of Bloomington
- Township of Bloomington City
- Township of Blount
- Township of Blue Mound
- Township of Blue Ridge
- Township of Bluffdale
- Township of Bluff Springs
- Township of Bois d'Arc
- Township of Bolo
- Township of Bond
- Township of Bonpas
- Township of Bonus
- Township of Boone
- Township of Bourbon
- Township of Bourbonnais
- Township of Bowdre
- Township of Bowlesville
- Township of Bowling
- Township of Bowling Green
- Township of Boynton
- Township of Braceville
- Township of Bradford
- Township of Bradley
- Township of Breese
- Township of Bremen
- Township of Brenton
- Township of Bridgeport
- Township of Brighton
- Township of Brimfield
- Township of Bristol
- Township of Broadwell
- Township of Brookfield
- Township of Brooklyn
- Township of Brookside
- Township of Brookville
- Township of Broughton
- Township of Brouilletts Creek
- Township of Brown
- Township of Browning
- Township of Bruce
- Township of Brushy
- Township of Brushy Mound
- Township of Buck
- Township of Buckeye
- Township of Buckhart
- Township of Buckheart
- Township of Buckhorn
- Township of Buena Vista
- Township of Buffalo
- Township of Buffalo Hart
- Township of Buffalo Prairie
- Township of Bunker Hill
- Township of Bureau
- Township of Burgess
- Township of Burlington
- Township of Burns
- Township of Burnside
- Township of Burnt Prairie
- Township of Burritt
- Township of Burton
- Township of Bushnell
- Township of Butler
- Township of Butler Grove
- Township of Button
- Township of Byron
- Township of Cache
- Township of Cahokia
- Township of Caledonia
- Township of Calumet
- Township of Camargo
- Township of Cambridge
- Township of Camden
- Township of Camp Point
- Township of Campton
- Township of Canoe Creek
- Township of Canteen
- Township of Canton
- Township of Capital
- Township of Carbondale
- Township of Carlinville
- Township of Carlyle
- Township of Carman
- Township of Carmi
- Township of Carrier Mills
- Township of Carrigan
- Township of Carroll
- Township of Carrollton
- Township of Carson
- Township of Carthage
- Township of Cartwright
- Township of Casey
- Township of Caseyville
- Township of Casner
- Township of Cass
- Township of Catlin
- Township of Cave
- Township of Cazenovia
- Township of Cedar
- Township of Central
- Township of Centralia
- Township of Centreville
- Township of Cerro Gordo
- Township of Chalmers
- Township of Chambersburg
- Township of Champaign
- Township of Champaign City
- Township of Chandlerville
- Township of Channahon
- Township of Charleston
- Township of Charlotte
- Township of Chatham
- Township of Chatsworth
- Township of Chebanse
- Township of Chemung
- Township of Cheneys Grove
- Township of Chenoa
- Township of Cherry Grove-Shannon
- Township of Cherry Valley
- Township of Chester
- Township of Chesterfield
- Township of Chestnut
- Township of Chili
- Township of Chillicothe
- Township of China
- Township of Chouteau
- Township of Christy
- Township of Cicero
- Township of Cincinnati
- Township of Claremont
- Township of Clarion
- Township of Clarksburg
- Township of Clay City
- Township of Clayton
- Township of Clear Lake
- Township of Clement
- Township of Clinton
- Township of Clintonia
- Township of Clover
- Township of Clyde
- Township of Coal Valley
- Township of Coe
- Township of Colchester
- Township of Coldbrook
- Township of Cold Spring
- Township of Colfax
- Township of Collinsville
- Township of Coloma
- Township of Colona
- Township of Columbus
- Township of Compromise
- Township of Concord
- Township of Condit
- Township of Cooper
- Township of Cooperstown
- Township of Copley
- Township of Coral
- Township of Cordova
- Township of Cornwall
- Township of Cortland
- Township of Corwin
- Township of Cottage
- Township of Cotton Hill
- Township of Cottonwood
- Township of Council Hill
- Township of Covington
- Township of Crane Creek
- Township of Creek
- Township of Crescent
- Township of Crete
- Township of Crittenden
- Township of Crook
- Township of Crooked Creek
- Township of Cropsey
- Township of Crouch
- Township of Cruger
- Township of Cuba
- Township of Cunningham
- Township of Curran
- Township of Custer
- Township of Dahlgren
- Township of Dakota
- Township of Dale
- Township of Dallas City
- Township of Danforth
- Township of Danvers
- Township of Danville
- Township of Darwin
- Township of Dawson
- Township of Dayton
- Township of Decatur
- Township of Decker
- Township of Deer Creek
- Township of Deerfield
- Township of Deer Park
- Township of Degognia
- Township of DeKalb
- Township of Delavan
- Township of Dement
- Township of Denison
- Township of Denning
- Township of Denver
- Township of Derinda
- Township of Derry
- Township of De Soto
- Township of Detroit
- Township of De Witt
- Township of Dillon
- Township of Dimmick
- Township of Divernon
- Township of Dix
- Township of Dixon
- Township of Dodds
- Township of Dolson
- Township of Dora
- Township of Dorchester
- Township of Dorr
- Township of Douglas
- Township of Dover
- Township of Downers Grove
- Township of Downs
- Township of Drummer
- Township of Drury
- Township of Dry Grove
- Township of Dry Point
- Township of Du Bois
- Township of Duncan
- Township of Dundee
- Township of Dunham
- Township of Dunleith
- Township of Du Page
- Township of Durand
- Township of Durham
- Township of Dwight
- Township of Eagle
- Township of Eagle Creek
- Township of Eagle Point
- Township of Earl
- Township of East Bend
- Township of East Eldorado
- Township of Eastern
- Township of East Fork
- Township of East Galena
- Township of East Grove
- Township of East Lincoln
- Township of East Nelson
- Township of East Oakland
- Township of East Saint Louis
- Township of Eden
- Township of Edford
- Township of Edgar
- Township of Edgington
- Township of Edwardsville
- Township of Ela
- Township of Elba
- Township of Elbridge
- Township of Eldorado
- Township of Elgin
- Township of Eliza
- Township of Elizabeth
- Township of Elk
- Township of Elk Grove
- Township of Elkhart
- Township of Elkhorn
- Township of Elkhorn Grove
- Township of Elk Prairie
- Township of Ellington
- Township of Ellison
- Township of Ellisville
- Township of Elm Grove
- Township of Elmira
- Township of Elm River
- Township of Elmwood
- Township of El Paso
- Township of Elsah
- Township of Elvira
- Township of Elwood
- Township of Embarrass
- Township of Eminence
- Township of Emma
- Township of Emmet
- Township of Empire
- Township of Enfield
- Township of Engelmann
- Township of English
- Township of Eppards Point
- Township of Equality
- Township of Erie
- Township of Erienna
- Township of Erin
- Township of Esmen
- Township of Essex
- Township of Evans
- Township of Evanston
- Township of Ewing
- Township of Fairfield
- Township of Fairhaven
- Township of Fairmount
- Township of Fairview
- Township of Fall Creek
- Township of Fall River
- Township of Fancy Creek
- Township of Farmers
- Township of Farmington
- Township of Farm Ridge
- Township of Farrington
- Township of Fayette
- Township of Fayetteville
- Township of Felix
- Township of Fenton
- Township of Fidelity
- Township of Field
- Township of Fillmore
- Township of Flagg
- Township of Flannigan
- Township of Flat Branch
- Township of Flint
- Township of Flora
- Township of Florence
- Township of Floyd
- Township of Fondulac
- Township of Forest City
- Township of Forrest
- Township of Forreston
- Township of Fort Russell
- Township of Foster
- Township of Fountain Bluff
- Township of Fountain Creek
- Township of Fountain Green
- Township of Four Mile
- Township of Fox
- Township of Frankfort
- Township of Franklin
- Township of Frederick
- Township of Freeburg
- Township of Freedom
- Township of Freeport
- Township of Fremont
- Township of Friends Creek
- Township of Fulton
- Township of Funks Grove
- Township of Galatia
- Township of Galesburg
- Township of Galesburg City
- Township of Galva
- Township of Ganeer
- Township of Garden Hill
- Township of Garden Plain
- Township of Gardner
- Township of Garfield
- Township of Garrett
- Township of Genesee
- Township of Geneseo
- Township of Geneva
- Township of Genoa
- Township of Georgetown
- Township of German
- Township of Germantown
- Township of Germanville
- Township of Gillespie
- Township of Gilmer
- Township of Girard
- Township of Gladstone
- Township of Godfrey
- Township of Gold
- Township of Gold Hill
- Township of Goode
- Township of Goodfarm
- Township of Goose Creek
- Township of Goose Lake
- Township of Goreville
- Township of Goshen
- Township of Grafton
- Township of Grand Detour
- Township of Grand Prairie
- Township of Grand Rapids
- Township of Grand Tower
- Township of Grandview
- Township of Grandville
- Township of Granite City
- Township of Grant
- Township of Grantsburg
- Township of Granville
- Township of Gray
- Township of Greenbush
- Township of Greene
- Township of Greenfield
- Township of Green Garden
- Township of Greenup
- Township of Greenville
- Township of Greenwood
- Township of Gridley
- Township of Griggsville
- Township of Grisham
- Township of Grove
- Township of Groveland
- Township of Grover
- Township of Guilford
- Township of Hadley
- Township of Hagener
- Township of Hahnaman
- Township of Haines
- Township of Hale
- Township of Hall
- Township of Hallock
- Township of Hamel
- Township of Hamilton
- Township of Hampshire
- Township of Hampton
- Township of Hancock
- Township of Hanna
- Township of Hanover
- Township of Hardin
- Township of Harlem
- Township of Harmon
- Township of Harmony
- Township of Harp
- Township of Harris
- Township of Harrisburg
- Township of Harrison
- Township of Harristown
- Township of Harter
- Township of Hartland
- Township of Harvel
- Township of Harwood
- Township of Havana
- Township of Haw Creek
- Township of Hawthorne
- Township of Hebron
- Township of Helvetia
- Township of Henderson
- Township of Hennepin
- Township of Henry
- Township of Hensley
- Township of Heralds Prairie
- Township of Herrick
- Township of Hickory
- Township of Hickory Hill
- Township of Hickory Point
- Township of Highland
- Township of Hillsboro
- Township of Hillyard
- Township of Hire
- Township of Hittle
- Township of Holland
- Township of Hollis
- Township of Homer
- Township of Honey Creek
- Township of Honey Point
- Township of Hoosier
- Township of Hope
- Township of Hopedale
- Township of Hopewell
- Township of Hopkins
- Township of Houston
- Township of Hoyleton
- Township of Hudson
- Township of Humboldt
- Township of Hume
- Township of Hunt City
- Township of Hunter
- Township of Huntsville
- Township of Hurlbut
- Township of Hurricane
- Township of Hutsonville
- Township of Hutton
- Township of Illini
- Township of Illiopolis
- Township of Independence
- Township of Indian Creek
- Township of Indian Grove
- Township of Indian Point
- Township of Indian Prairie
- Township of Indiantown
- Township of Industry
- Township of Irishtown
- Township of Iroquois
- Township of Irving
- Township of Irvington
- Township of Isabel
- Township of Island Grove
- Township of Iuka
- Township of Jackson
- Township of Jamaica
- Township of Jarvis
- Township of Jasper
- Township of Jefferson
- Township of Jersey
- Township of Johannisburg
- Township of Johnson
- Township of Joliet
- Township of Jonathan Creek
- Township of Jordan
- Township of Joshua
- Township of Jubilee
- Township of Kane
- Township of Kaneville
- Township of Kankakee
- Township of Kansas
- Township of Kaskaskia
- Township of Keene
- Township of Keith
- Township of Keithsburg
- Township of Kelly
- Township of Kendall
- Township of Kent
- Township of Kerr
- Township of Kerton
- Township of Kewanee
- Township of Kickapoo
- Township of Kilbourne
- Township of Kinderhook
- Township of King
- Township of Kingston
- Township of Kinkaid
- Township of Kinmundy
- Township of Knight Prairie
- Township of Knox
- Township of La Clede
- Township of Lacon
- Township of Laenna
- Township of Lafayette
- Township of Lagrange
- Township of La Harpe
- Township of Lake
- Township of Lake Fork
- Township of Lake Villa
- Township of Lakewood
- Township of Lamard
- Township of La Moille
- Township of Lamoine
- Township of Lamotte
- Township of Lancaster
- Township of Lanesville
- Township of Laona
- Township of La Prairie
- Township of Larkinsburg
- Township of La Salle
- Township of Lawndale
- Township of Lawrence
- Township of Leaf River
- Township of Lebanon
- Township of Lee
- Township of Lee Center
- Township of Leech
- Township of Leef
- Township of Leepertown
- Township of Lemont
- Township of Lenox
- Township of Lenzburg
- Township of LeRoy
- Township of Levan
- Township of Levee
- Township of Lewistown
- Township of Lexington
- Township of Leyden
- Township of Liberty
- Township of Libertyville
- Township of Licking
- Township of Lima
- Township of Limestone
- Township of Lincoln
- Township of Linder
- Township of Linn
- Township of Lisbon
- Township of Lisle
- Township of Little Mackinaw
- Township of Little Rock
- Township of Littleton
- Township of Lively Grove
- Township of Liverpool
- Township of Loami
- Township of Lockport
- Township of Locust
- Township of Loda
- Township of Logan
- Township of Lomax
- Township of Lone Grove
- Township of Long Branch
- Township of Long Creek
- Township of Long Point
- Township of Looking Glass
- Township of Loraine
- Township of Loran
- Township of Loudon
- Township of Louisville
- Township of Love
- Township of Lovejoy
- Township of Lovington
- Township of Lowe
- Township of Lucas
- Township of Ludlow
- Township of Lukin
- Township of Lyman
- Township of Lynchburg
- Township of Lyndon
- Township of Lynn
- Township of Lynnville
- Township of Lyons
- Township of Mackinaw
- Township of Macomb
- Township of Macomb City
- Township of Macon
- Township of Madison
- Township of Magnolia
- Township of Mahomet
- Township of Maine
- Township of Makanda
- Township of Malone
- Township of Malta
- Township of Manchester
- Township of Manhattan
- Township of Manito
- Township of Manlius
- Township of Manteno
- Township of Maquon
- Township of Marengo
- Township of Marine
- Township of Marion
- Township of Marissa
- Township of Maroa
- Township of Marrowbone
- Township of Marshall
- Township of Martin
- Township of Martinsburg
- Township of Martinsville
- Township of Martinton
- Township of Maryland
- Township of Mascoutah
- Township of Mason
- Township of Mason City
- Township of Massilon
- Township of Mattoon
- Township of Maxwell
- Township of May
- Township of Mayberry
- Township of Mayfield
- Township of Mazon
- Township of McClellan
- Township of McHenry
- Township of McKee
- Township of McKendree
- Township of McLeansboro
- Township of Meacham
- Township of Mechanicsburg
- Township of Media
- Township of Medina
- Township of Melrose
- Township of Mendon
- Township of Mendota
- Township of Menominee
- Township of Mercer
- Township of Meriden
- Township of Meridian
- Township of Metamora
- Township of Middlefork
- Township of Middleport
- Township of Milam
- Township of Milan
- Township of Milford
- Township of Milks Grove
- Township of Millbrook
- Township of Miller
- Township of Millersburg
- Township of Mills
- Township of Mill Shoals
- Township of Millstadt
- Township of Milo
- Township of Milton
- Township of Mineral
- Township of Minonk
- Township of Mission
- Township of Mississippi
- Township of Missouri
- Township of Moccasin
- Township of Moline
- Township of Momence
- Township of Mona
- Township of Monee
- Township of Money Creek
- Township of Monmouth
- Township of Monroe
- Township of Montebello
- Township of Montezuma
- Township of Montgomery
- Township of Monticello
- Township of Montmorency
- Township of Moores Prairie
- Township of Moraine
- Township of Morgan
- Township of Moro
- Township of Morris
- Township of Morton
- Township of Mosquito
- Township of Mound
- Township of Mountain
- Township of Mount Auburn
- Township of Mount Carroll
- Township of Mount Erie
- Township of Mount Hope
- Township of Mount Morris
- Township of Mount Olive
- Township of Mount Pleasant
- Township of Mount Pulaski
- Township of Mount Sterling
- Township of Mount Vernon
- Township of Mount Zion
- Township of Moweaqua
- Township of Mulberry Grove
- Township of Munson
- Township of Murdock
- Township of Murphysboro
- Township of Naausay
- Township of Nachusa
- Township of Nameoki
- Township of Naperville
- Township of Nashua
- Township of Nashville
- Township of Nauvoo
- Township of Nebraska
- Township of Nelson
- Township of Neoga
- Township of Neponset
- Township of Nettle Creek
- Township of Nevada
- Township of New Athens
- Township of New Berlin
- Township of New Boston
- Township of Newburg
- Township of Newcomb
- Township of New Douglas
- Township of Newell
- Township of New Haven
- Township of New Lenox
- Township of Newman
- Township of Newmansville
- Township of Newport
- Township of New Salem
- Township of Newton
- Township of Newtown
- Township of New Trier
- Township of Niantic
- Township of Niles
- Township of Nilwood
- Township of Nixon
- Township of Noble
- Township of Nokomis
- Township of Nora
- Township of Normal
- Township of Norman
- Township of Northeast
- Township of Northern
- Township of Northfield
- Township of North Fork
- Township of North Henderson
- Township of North Litchfield
- Township of North Muddy
- Township of North Okaw
- Township of North Otter
- Township of North Palmyra
- Township of Northville
- Township of Norton
- Township of Norwood Park
- Township of Nunda
- Township of Oakdale
- Township of Oakland
- Township of Oakley
- Township of Oak Park
- Township of Oakwood
- Township of Oblong
- Township of Oconee
- Township of Odell
- Township of Odin
- Township of O'Fallon
- Township of Ogden
- Township of Ohio
- Township of Ohio Grove
- Township of Okaw
- Township of Okawville
- Township of Old Ripley
- Township of Oldtown
- Township of Olio
- Township of Olive
- Township of Olney
- Township of Omaha
- Township of Omega
- Township of Omphghent
- Township of Onarga
- Township of Oneco
- Township of Ontario
- Township of Ophir
- Township of Oquawka
- Township of Ora
- Township of Oran
- Township of Orange
- Township of Orchard
- Township of Oregon
- Township of Oregon-Nashua
- Township of Orel
- Township of Orion
- Township of Orland
- Township of Orvil
- Township of Osage
- Township of Osceola
- Township of Osco
- Township of Oskaloosa
- Township of Oswego
- Township of Otego
- Township of Ottawa
- Township of Otter Creek
- Township of Otto
- Township of Owego
- Township of Owen
- Township of Oxford
- Township of Palatine
- Township of Palestine
- Township of Palmyra
- Township of Palos
- Township of Pana
- Township of Panola
- Township of Panther Creek
- Township of Papineau
- Township of Paradise
- Township of Paris
- Township of Parker
- Township of Partridge
- Township of Patoka
- Township of Patterson
- Township of Patton
- Township of Pawnee
- Township of Paw Paw
- Township of Payson
- Township of Peach Orchard
- Township of Pea Ridge
- Township of Pearl
- Township of Pecatonica
- Township of Pekin
- Township of Pella
- Township of Pembroke
- Township of Pendleton
- Township of Penn
- Township of Pennsylvania
- Township of Peoria City
- Township of Peotone
- Township of Perry
- Township of Perryton
- Township of Persifer
- Township of Peru
- Township of Pesotum
- Township of Petty
- Township of Phenix
- Township of Philadelphia
- Township of Phillips
- Township of Philo
- Township of Piasa
- Township of Pickaway
- Township of Pierce
- Township of Pigeon Grove
- Township of Pike
- Township of Pilot
- Township of Pilot Grove
- Township of Pilot Knob
- Township of Pine Creek
- Township of Pine Rock
- Township of Pin Oak
- Township of Pitman
- Township of Pittsfield
- Township of Pixley
- Township of Plainfield
- Township of Plato
- Township of Pleasant
- Township of Pleasant Grove
- Township of Pleasant Hill
- Township of Pleasant Mound
- Township of Pleasant Ridge
- Township of Pleasant Vale
- Township of Pleasant Valley
- Township of Pleasant View
- Township of Plum Hill
- Township of Point Pleasant
- Township of Polk
- Township of Pomona
- Township of Pontiac
- Township of Pontoosuc
- Township of Pope
- Township of Poplar Grove
- Township of Port Byron
- Township of Portland
- Township of Prairie
- Township of Prairie City
- Township of Prairie Creek
- Township of Prairie Du Long
- Township of Prairie Green
- Township of Prairieton
- Township of Preemption
- Township of Preston
- Township of Princeton
- Township of Princeville
- Township of Prophetstown
- Township of Proviso
- Township of Putman
- Township of Quarry
- Township of Quincy
- Township of Quiver
- Township of Raccoon
- Township of Radnor
- Township of Raleigh
- Township of Ramsey
- Township of Randolph
- Township of Rantoul
- Township of Raritan
- Township of Rawlins
- Township of Raymond
- Township of Reading
- Township of Rector
- Township of Reed
- Township of Reynolds
- Township of Rice
- Township of Rich
- Township of Richfield
- Township of Richland
- Township of Richland Grove
- Township of Richmond
- Township of Richview
- Township of Richwood
- Township of Richwoods
- Township of Ricks
- Township of Ridge
- Township of Ridgeland
- Township of Ridgway
- Township of Ridott
- Township of Riley
- Township of Rio
- Township of Ripley
- Township of River Forest
- Township of Riverside
- Township of Rivoli
- Township of Roanoke
- Township of Roberts
- Township of Robinson
- Township of Rochester
- Township of Rockbridge
- Township of Rock Creek
- Township of Rock Creek-Lima
- Township of Rockford
- Township of Rock Grove
- Township of Rock Island
- Township of Rock Run
- Township of Rockton
- Township of Rockvale
- Township of Rockville
- Township of Rocky Run
- Township of Rogers
- Township of Rome
- Township of Romine
- Township of Roodhouse
- Township of Rooks Creek
- Township of Rosamond
- Township of Roscoe
- Township of Rose
- Township of Rosedale
- Township of Rosefield
- Township of Roseville
- Township of Ross
- Township of Round Grove
- Township of Rountree
- Township of Rozetta
- Township of Rubicon
- Township of Rural
- Township of Rush
- Township of Rushville
- Township of Russell
- Township of Rutland
- Township of Rutledge
- Township of Ruyle
- Township of Sadorus
- Township of Saint Albans
- Township of Saint Anne
- Township of Saint Charles
- Township of Saint Clair
- Township of Sainte Marie
- Township of Saint Francis
- Township of Saint Jacob
- Township of Saint Joseph
- Township of Saint Mary
- Township of Saint Rose
- Township of Salem
- Township of Salina
- Township of Saline
- Township of Salisbury
- Township of Salt Creek
- Township of Sandoval
- Township of Sand Prairie
- Township of Sand Ridge
- Township of Sandwich
- Township of Sangamon
- Township of Sangamon Valley
- Township of Santa Anna
- Township of Santa Fe
- Township of Saratoga
- Township of Sargent
- Township of Saunemin
- Township of Savanna
- Township of Scales Mound
- Township of Schaumburg
- Township of Sciota
- Township of Scotland
- Township of Scott
- Township of Scottville
- Township of Sefton
- Township of Selby
- Township of Seminary
- Township of Senachwine
- Township of Seneca
- Township of Serena
- Township of Seven Hickory
- Township of Seward
- Township of Shabbona
- Township of Shafter
- Township of Sharon
- Township of Shawnee
- Township of Shaws Point
- Township of Shelbyville
- Township of Sheldon
- Township of Sheridan
- Township of Sherman
- Township of Shields
- Township of Shiloh
- Township of Shiloh Valley
- Township of Shipman
- Township of Shirland
- Township of Shoal Creek
- Township of Sidell
- Township of Sidney
- Township of Sigel
- Township of Silver Creek
- Township of Simpson
- Township of Six Mile
- Township of Smallwood
- Township of Smithton
- Township of Somer
- Township of Somerset
- Township of Somonauk
- Township of Songer
- Township of Sonora
- Township of South Crouch
- Township of South Dixon
- Township of South Fillmore
- Township of South Flannigan
- Township of South Fork
- Township of South Grove
- Township of South Homer
- Township of South Hurricane
- Township of South Litchfield
- Township of South Macon
- Township of South Moline
- Township of South Muddy
- Township of South Ottawa
- Township of South Otter
- Township of South Palmyra
- Township of South Rock Island
- Township of South Ross
- Township of South Twigg
- Township of Southwest
- Township of South Wheatland
- Township of Sparta
- Township of Spring
- Township of Spring Bay
- Township of Spring Creek
- Township of Springfield
- Township of Spring Garden
- Township of Spring Grove
- Township of Spring Lake
- Township of Spring Point
- Township of Squaw Grove
- Township of Stanford
- Township of Stanton
- Township of Staunton
- Township of Sterling
- Township of Steuben
- Township of Stevenson
- Township of Stickney
- Township of Stites
- Township of Stockland
- Township of Stockton
- Township of Stonefort
- Township of Stonington
- Township of Stookey
- Township of Stratton
- Township of Stronghurst
- Township of Sublette
- Township of Suez
- Township of Sugar Creek
- Township of Sugar Grove
- Township of Sugar Loaf
- Township of Sullivan
- Township of Sullivant
- Township of Summit
- Township of Sumner
- Township of Sumpter
- Township of Sunbury
- Township of Swan
- Township of Sycamore
- Township of Symmes
- Township of Talkington
- Township of Tamalco
- Township of Tampico
- Township of Tate
- Township of Taylor
- Township of Taylorville
- Township of Tennessee
- Township of Terre Haute
- Township of Teutopolis
- Township of Texas
- Township of Thompson
- Township of Thornton
- Township of Timber
- Township of Todds Point
- Township of Tolono
- Township of Tompkins
- Township of Tonti
- Township of Toulon
- Township of Towanda
- Township of Tower Hill
- Township of Tremont
- Township of Trivoli
- Township of Troy
- Township of Troy Grove
- Township of Truro
- Township of Tunbridge
- Township of Tunnel Hill
- Township of Tuscola
- Township of Twigg
- Township of Tyrone
- Township of Union
- Township of Union Grove
- Township of Unity
- Township of Urbana
- Township of Ursa
- Township of Ustick
- Township of Utica
- Township of Valley
- Township of Vance
- Township of Vandalia
- Township of Venedy
- Township of Venice
- Township of Vergennes
- Township of Vermillion
- Township of Vermont
- Township of Vernon
- Township of Versailles
- Township of Victor
- Township of Victoria
- Township of Vienna
- Township of Vinegar Hill
- Township of Viola
- Township of Virden
- Township of Virgil
- Township of Virginia
- Township of Wabash
- Township of Waddams
- Township of Wade
- Township of Waldo
- Township of Walker
- Township of Walkerville
- Township of Wall
- Township of Wallace
- Township of Walnut
- Township of Walnut Grove
- Township of Walshville
- Township of Waltham
- Township of Wapella
- Township of Wards Grove
- Township of Warren
- Township of Warsaw
- Township of Washington
- Township of Waterford
- Township of Watson
- Township of Wauconda
- Township of Waukegan
- Township of Wauponsee
- Township of Wayne
- Township of Waynesville
- Township of Webber
- Township of Weller
- Township of Wesley
- Township of West
- Township of West Deerfield
- Township of Western
- Township of Western Mound
- Township of Westfield
- Township of West Galena
- Township of West Jersey
- Township of West Lincoln
- Township of West Peoria
- Township of West Point
- Township of Wethersfield
- Township of Wheatfield
- Township of Wheatland
- Township of Wheeling
- Township of Whitefield
- Township of White Hall
- Township of White Oak
- Township of White Rock
- Township of Whitley
- Township of Whitmore
- Township of Wilberton
- Township of Wilcox
- Township of Will
- Township of Williams
- Township of Willow Branch
- Township of Willow Creek
- Township of Willow Hill
- Township of Wilmington
- Township of Wilson
- Township of Wilton
- Township of Windsor
- Township of Winfield
- Township of Winnebago
- Township of Winslow
- Township of Witt
- Township of Woodbine
- Township of Woodbury
- Township of Woodland
- Township of Wood River
- Township of Woodside
- Township of Woodstock
- Township of Woodville
- Township of Woosung
- Township of Worth
- Township of Wrights
- Township of Wyanet
- Township of Wyoming
- Township of Wysox
- Township of Wythe
- Township of Xenia
- Township of Yates
- Township of Yellowhead
- Township of York
- Township of Yorktown
- Township of Young America
- Township of Young Hickory
- Township of Zanesville
- Township of Zif
- Township of Zion
- Township of Zuma
- Trailpark Gardens
- Tremont
- Trenton
- Trenton Corners
- Trilla
- Trimble
- Triumph
- Trivoli
- Troster
- Trout Valley
- Trowbridge
- Troxel
- Troy
- Troy Crossing
- Troy Grove
- Troy (historical)
- Troy Junction
- Trumbull Park Homes
- Trumbull Park Terrace
- Truro
- Tuckers Corners
- Tunbridge
- Tunnel Hill
- Tunnel Hill Election Precinct
- Turner Camp
- Turner Landing
- Turpin
- Tuscarora
- Tuscola
- Twelvemile Corner
- Twin Churches
- Twin Grove
- Udina
- Ulah
- Ullin
- Ullin Election Precinct
- Ullrich
- Undercliff
- Union
- Union Center
- Union County
- Union District Number 1 Election Precinct
- Union District Number 2 Election Precinct
- Union Grove
- Union Hill
- Union Point
- Uniontown
- Union Town
- Unionville
- Unity
- University
- University Park
- University Village
- Upper Alton
- Uptown
- Urbain
- Urbana
- Urbandale
- Ursa
- Ustick
- Utah
- Utica
- Utopia
- Valentine Manor
- Valier
- Valier Patch
- Valley City
- Valley Creek (historical)
- Valley Mission
- Valley View
- Valley View Farm
- Valmeyer
- Van Burensburg
- Vandalia
- Vandercook
- Vanderville
- Vanland (historical)
- Van Orin
- Van Peterson Subdivision
- Van Petten
- Van Wood
- Varna
- Velma
- Venedy
- Venetian Village
- Venice
- Vera
- Vergennes
- Vermilion
- Vermilion City
- Vermilion County
- Vermilion Grove
- Vermilion Heights
- Vermilionville
- Vermont
- Vernal
- Vernon
- Vernon Hills
- Verona
- Versailles
- Vevay Park
- Victor A Olander Homes
- Victoria
- Victory Homes
- Vienna
- Vienna Number 1 Election Precinct
- Vienna Number 2 Election Precinct
- Vienna Number 3 Election Precinct
- Village Square
- Villa Grove
- Villa Park
- Villa Ridge
- Villa Ridge Election Precinct
- Villas
- Villas North
- Villas of Northbrook
- Villas West
- Ville Du Parc
- Viola
- Virden
- Virgil
- Virgil (historical)
- Virginia
- Volo
- Volte Court
- Von Glen Acres
- Voorhies
- Vulcan
- Wabash County
- Wabash Election Precinct
- Wabash Point
- Wacker
- Waddams Grove
- Wadsworth
- Waggoner
- Wagon Creek Heaven
- Wahl's Subdivision
- Wakefield
- Waldo
- Waldron (historical)
- Walker
- Walkerville
- Walla Walla
- Wallingford
- Walnut
- Walnut Grove
- Walnut Hill
- Walnut Prairie
- Walpole
- Walsh
- Walsh Election Precinct
- Walshville
- Waltersburg
- Waltham
- Walton
- Waltonville
- Walz
- Wamac
- Wanborough (historical)
- Wanda
- Wanlock
- Wapella
- Ward
- Ware
- Warner
- Warnock
- Warren
- Warren County
- Warrenhurst
- Warrensburg
- Warrenville
- Warrington
- Warsaw
- Wartburg
- Wartrace
- Wasco
- Washburn
- Washington
- Washington County
- Washington Election Precinct
- Washington Heights
- Washington Park
- Washington Park Court
- Wasson
- Wataga
- Water Edge Subdivision
- Waterford (historical)
- Waterloo
- Waterman
- Watertown
- Watertown (historical)
- Water Valley
- Watkins
- Watkins Ford
- Watseka
- Watson
- Wauconda
- Waukegan
- Wauponsee
- Waverly
- Wayland
- Wayne
- Wayne Center
- Wayne City
- Wayne County
- Waynesville
- Weaver
- Webster
- Webster Hill Estates
- Webster Number 5 Election Precinct
- Webster Park
- Wedges Corner
- Wedron
- Weedman
- Weir
- Welco Corners
- Weldon
- Weldwood Oaks
- Welge
- Welland
- Weller's Subdivision
- Wellington
- Wells Corners
- Wempletown
- Wendel
- Wendelin
- Wenmoth Acres
- Wenona
- Wenonah
- Wertenberg
- Wesley
- West Brooklyn
- West Brooklyn Election Precinct
- Westchester
- West Chicago
- West City
- West Dundee
- West Edgewater
- West Elsdon
- West End
- West Englewood
- Western Dunning
- Western Springs
- Westervelt
- Westfield
- Westfield Corners
- West Frankfort
- West Garfield Park
- West Grand Place
- West Hallock
- West Harvey
- West Highland Acres
- West Jersey
- West Junction
- West Kankakee
- West Lake Forest
- West Lawn
- West Liberty
- Westminster (historical)
- Westmont
- Westmoreland
- West Newell
- Weston
- Weston (historical)
- West Peoria
- West Point
- Westport
- West Pullman
- West Ravenwood
- West Ridge
- West Roseland
- West Rosiclare Election Precinct
- West Rural Hill
- West Salem
- West Sandford
- West Town
- West Union
- West Vienna
- Westview
- Westview Acres
- Westville
- West York
- Wetaug
- Wetaug Election Precinct
- Wetzel
- Weybridge
- Wheaton
- Wheeler
- Wheeling
- Whiskey Point
- Whiskey Row
- Whisperwoods of Northbrook
- Whitaker
- White Ash
- White Birch Lakes
- White City
- White County
- Whitefield
- White Hall
- White Heath
- White Hill
- Whiteoak
- White Oak
- White Oak Springs (historical)
- White Pigeon
- White Plains
- White Rock
- Whiteside County
- Whitesville (historical)
- White Willow (historical)
- Whittington
- Whitton
- Wichert
- Wideview
- Wilbern
- Wilberton
- Wilbur Heights
- Wildebrook On The Green
- Wilderman
- Wildrose
- Wildrose Valley
- Wildwood
- Wildwood Valley
- Wilkinson
- Willard
- Will County
- Willeford
- Willeys
- William Green Homes
- Williamsburg
- Williamsburg Green
- Williamsburg Hill
- Williamsburg (historical)
- Williamsburg Square
- Williamsfield
- Williamson
- Williamson County
- Williams Park
- Williamsville
- Willisville
- Willisville Election Precinct
- Willow
- Willowbrook
- Willowbrook Acres
- Willow Cove
- Willow Creek
- Willow Creek Trailer Park
- Willow Hill
- Willow Ridge
- Willows North
- Willow Springs
- Willow Woods
- Wilmette
- Wilmington
- Wilshire Terrace
- Wilsman
- Wilson
- Wilsonburg (historical)
- Wilson Heights
- Wilsonville
- Wilton
- Wilton Center
- Winchester
- Winchester-Hood Garden Homes
- Winchester Number 1 Election Precinct
- Winchester Number 2 Election Precinct
- Winchester Number 3 Election Precinct
- Windenoak
- Windham
- Windham Manor
- Windsor
- Windsor Park
- Wine Hill
- Wine Hill Election Precinct
- Winfield
- Wing
- Winkel
- Winkle
- Winnebago
- Winnebago County
- Winnebago Court
- Winneberger
- Winnemac
- Winneshiek
- Winnetka
- Winschester Lane North
- Winslow
- Winston
- Winterrowd
- Winthrop Harbor
- Winthrop Harbor Station
- Winthrop Village
- Witt
- Woburn
- Wolcott Gardens
- Wolcotts and Bushnells Additions
- Wolf Creek
- Wolf Lake
- Wolfs
- Womac
- Wonder Center
- Wonder Lake
- Woodbine
- Woodburn
- Woodbury
- Woodcrest
- Wood Dale
- Woodford
- Woodford County
- Woodhull
- Woodland
- Woodland Acres
- Woodland Addition
- Woodland Estates
- Woodland Hills
- Woodland Junction
- Woodlands
- Woodland Shores
- Woodlawn
- Woodlawn Court
- Woodmere Subdivision
- Woodoaks Court
- Wood Oaks Glen
- Woodridge
- Wood River
- Woodruff
- Woodruff Corners
- Woods
- Woodside
- Woodson
- Woodson Election Precinct
- Woodstock
- Woodvale
- Woodville
- Woodville (historical)
- Woodworth
- Woody
- Woodyard
- Woosung
- Worden
- Worth
- Wrights
- Wrights Corner
- Wyanet
- Wyckles
- Wyckles Corners
- Wynoose
- Wyoming
- Wyton
- Xenia
- Yale
- Yantisville
- Yates City
- Yatesville
- Yeager
- Yellow Banks
- Yellow Creek
- Yeomans
- Yeoward Addition
- Yoder Addition
- York
- York Center
- Yorkfield
- Yorktown
- Yorkville
- Youngsdale
- Youngstown
- Yuton
- Zanesville
- Zearing
- Zeigler
- Zenith
- Zenobia
- Zier Cors