- Abingdon
- Acorn Acres
- Adair
- Adams (historical)
- Addison
- Adeline
- Adrian
- Afolkey
- Afton Center
- Agnew
- Ahern
- Aiken
- Akron
- Albany
- Albany Park
- Albers
- Albion
- Alden
- Aldine Square
- Aledo
- Alexis
- Alexis Junction
- Algonquin
- Aliceville
- Allen
- Allens Corners
- Allentown
- Almora
- Almora Heights
- Alonzo
- Alorton
- Alpha
- Alpine
- Alsip
- Alta
- Altamont
- Altgeld Gardens
- Altmar
- Alton
- Altona
- Altorf
- Alvin
- Alworth
- Amboy
- Amenia
- Ament Corners
- Amherst
- Anand Brook
- Anchor
- Ancient Oaks
- Ancient Tree
- Ancona
- Andalusia
- Andover
- Andres
- Andrews and Hurds Subdivision
- Anetsberger's Subdivision
- Anna
- Annawan
- Anns Mobile Home Park
- Antioch
- Appaloosa West
- Apple Canyon Lake
- Apple River
- Appleton
- Aptakisic
- Arbor Creek
- Arbor Settlement
- Arboretum Estates
- Arbury Hills
- Arcade Row
- Archer Heights
- Archer Limits
- Arcola
- Argo Fay
- Argyle
- Arlington
- Arlington Heights
- Armington
- Armour Patch
- Armour Square
- Armsby (historical)
- Armstrong
- Arnold
- Aroma Park
- Arpee
- Arrow Ridge Mobile Home Park
- Arrowhead
- Arrowsmith
- Arthur
- Arthur L Johnson Subdivision
- Ashburn
- Ashdale Junction
- Ashkum
- Ashland
- Ashton
- Askvig Addition
- Aspen Meadows
- Assumption
- Astoria
- Athens
- Atkinson
- Atlanta
- Atterberry
- Atwood
- Atwood Estates
- Atwood Park Estates
- Auburn
- Auburn Gresham
- Auburn Park
- Augerville
- Augusta
- Aurora
- Austin
- Autumn Lake Estates
- Aux Sable
- Avalon Highlands
- Avalon Park
- Avanti Ridge
- Averyville
- Aviston
- Avoca (historical)
- Avon
- Avondale
- Ayers
- Babcock
- Babylon
- Bachs Addition
- Back of the Yards
- Bader
- Bailey Falls (historical)
- Baileyville
- Baker
- Bakers Acres
- Bakerville
- Bald Bluff
- Bald Mound
- Baldwin
- Baldwin Beach
- Ballou
- Bancroft Corners
- Banner
- Bannockburn
- Barbers Corners
- Bardolph
- Barlow Park
- Barnard Mill (historical)
- Barnes
- Barreville
- Barrington
- Barrington Center
- Barrington Hills, Cook County
- Barrington Hills, McHenry County
- Barrington Woods
- Barry
- Barstow
- Bartlett
- Bartonville
- Basco
- Basham Carriage Manor Estates
- Batavia
- Batavia Junction
- Batestown
- Bath
- Bay View Garden
- Bayberry Ridge
- Beach Park
- Beach Station
- Beacon Hill
- Beaconridge
- Beardstown
- Beason
- Beaty
- Beaver Creek
- Beaverton Crossroads
- Beaverville
- Beckemeyer
- Becks Park
- Bedford Park
- Beecher
- Beeler Terrace
- Beiler Subdivision
- Bel-Bo Mobile Home Park
- Belden
- Belgium
- Belgium Row
- Belgravia Terrace
- Bell
- Bellbrook
- Belleville
- Bellevue
- Bellflower
- Bellwood
- Belmont
- Belmont Cragin
- Belmont Park
- Belvidere
- Bement
- Benld
- Bennett
- Bensenville
- Benson
- Bentley
- Benton
- Bentown
- Berger
- Berkeley
- Berkeley Cottages
- Bernadotte (historical)
- Bernice
- Berwick
- Berwyn
- Bethalto
- Bethany
- Beverly
- Beverly Hills
- Beverly Manor
- Big Foot Prairie
- Big Oak Mobile Home Park
- Big Rock
- Big Run Acres
- Biggs
- Biggsville
- Bill Butler Mobile Home Park
- Binghampton
- Binnie Hills
- Binnie Lakes
- Birch Pond
- Birchwood
- Birds
- Birkbeck
- Birmingham
- Bishop
- Bishop Hill
- Bishops Ridge
- Bismarck
- Blackberry Acres
- Blackberry Woods
- Blackcrest
- Blackhawk
- Blackhawk Estates
- Blackhawk Island Subdivision
- Blackhawk Island Subdivision Number 2
- Blacks
- Blackstone
- Blaine
- Blair
- Blakes
- Blanding
- Blandinsville
- Blodgett, Will County
- Blodgett, Lake County
- Bloomfield
- Bloomfield Village
- Bloomfield West
- Bloomingdale
- Bloomington
- Bloomington Heights
- Blue Blaze Mobile Home Estates
- Blue Grass (historical)
- Blue Island
- Blue Mound
- Blue Ridge
- Bluff City
- Blyton
- Bobtown
- Boden
- Bohemian California
- Bolingbrook
- Bolton
- Bondville
- Bonfield
- Bonnie Valley
- Boschome
- Boula
- Boulder Hill
- Bourbonais (historical)
- Bourbonnais
- Bowen
- Bowes
- Bowes Bend
- Bowling Green (historical)
- Bowmanville
- Boynton
- Braceville
- Bradford
- Bradford Place
- Bradless Subdivision
- Bradley
- Bradley Subdivision
- Braeside
- Braeside Subdivision
- Braidwood
- Brainerd
- Breckenridge
- Breckenridge Estates
- Breeds
- Breese
- Bremen
- Brentwood
- Brereton
- Brewster Heights
- Briar Bluff
- Briar Gate
- Briarwood
- Briarwood Glen
- Bricktown
- Bridgeport, Cook County
- Bridgeport, Lawrence County
- Bridgeport (historical)
- Bridgeview
- Bridgeway Addition
- Bridlewood Lane
- Bridlewoods
- Briergate
- Briergate Station
- Brierwoods
- Brighton
- Brighton Lakes
- Brighton Park
- Brimfield
- Brinksburg (historical)
- Brisbane
- Bristol
- Bristol Heights
- Broadmoor
- Broadview
- Broadwell
- Brockdale Manor
- Brokaw
- Broken Arrow
- Bronson
- Bronzeville
- Brook Crossings Estates
- Brook Lawn
- Brookdale
- Brookfield
- Brookline
- Brooklyn
- Brookside, Kane County
- Brookside, Will County
- Brookside Estates
- Brookville, Ogle County
- Brookville, Vermilion County
- Brookwood Estates, Will County
- Brothers
- Browning
- Browns Mill
- Brownwood
- Bryant
- Bryce
- Buckeye
- Buckhorn Corners
- Buckingham
- Buckley
- Bucks
- Bucktown
- Buda
- Budd
- Buena Park
- Buena Vista
- Buffalo Grove, Ogle County
- Buffalo Grove, Cook County
- Buffalo Prairie
- Bull Valley
- Bunker Hill
- Burbank
- Bureau
- Burgess
- Burke
- Burlington
- Burnett
- Burnham
- Burnham Place
- Burnham Point
- Burning Tree
- Burns
- Burnside, Hancock County
- Burnside, Cook County
- Burnside (historical)
- Burr Oak Acres
- Burr Ridge
- Burt
- Burton View
- Burtons Bridge
- Bushnell
- Bushs Corners
- Buttonwood
- Buzzville
- Bybee
- Byron
- Byron Hills Estates
- C H Taylor's Sanwaldrun Estates
- Cabery
- Cable
- Cabrini Addition
- Cache Lake
- Cahokia
- Cairo
- Caldwell
- Caledonia
- Caledonia (historical)
- California Park
- Calumet
- Calumet City
- Calumet Heights
- Calumet Park
- Cambria
- Cambridge
- Cambridge Place
- Camden
- Cameron
- Camp Algonquin
- Camp Grove
- Camp Logan
- Camp Point
- Campbell
- Campton Pines
- Campus
- Canal Trustees
- Canalport
- Canaryville
- Candlewick Lake
- Canton
- Canton Crossing
- Canyon Ridge
- Capri Village
- Capron
- Carbon Cliff
- Carbon Hill
- Carbondale
- Cardiff
- Cardinal Court
- Carillon
- Carl Sandburg Village
- Carle Springs
- Carlinville
- Carlock
- Carlye Subdivision
- Carlyle
- Carman
- Carmi
- Carol Stream
- Carpenters Addition
- Carpentersville
- Carriage Lane Estates
- Carrier Mills
- Carrollton
- Carterville
- Carthage, Hancock County
- Carthage, Ogle County
- Carthage Lake
- Carville
- Cary
- Casey
- Caseyville
- Castle Junction
- Castleton
- Catharine
- Catlin
- Caton Farm
- Cayuga
- Cazenovia
- Cecka Mobile Home Park
- Cedar Acres
- Cedar Bluff Estates
- Cedar Brook
- Cedar Creek
- Cedar Glen
- Cedar Lawn
- Cedar Point
- Cedarbrook Court
- Cedarville
- Center Hill
- Centerville, Knox County
- Centerville, Piatt County
- Centerville (historical)
- Central
- Central City, Grundy County
- Central City, Marion County
- Central Park
- Central Station
- Centralia
- Centreville
- Century East
- Cereal
- Cerro Gordo
- Chadwick
- Champaign
- Champion Creek
- Champlin
- Chana
- Chandlerville
- Channahon
- Channel Lake
- Chapel Hill
- Chapel Hill Estates
- Charlemagne
- Charlemagne East
- Charleston
- Charlotte
- Charlottes Trailer Court
- Charring Cross
- Charter Grove
- Chatham, Cook County
- Chatham, Sangamon County
- Chatham Fields
- Chatsworth
- Chatton
- Chautauqua Park
- Chebanse
- Checkrow
- Cheltenham
- Chemung
- Cheneyville
- Chenoa
- Cherry
- Cherry Hill
- Cherry Valley
- Cherry Wood Trailer Park
- Cherrywood
- Chesnut Pointe
- Chester
- Chester Highlands
- Chestervale
- Chestnut
- Cheyenne Heights
- Chicago
- Chicago Heights
- Chicago Lawn
- Chicago Loop
- Chicago Ridge
- Chickasaw
- Childers Acres
- Chili
- Chillicothe
- Chinatown
- Chippewa
- Chittenden
- Chrisman
- Christopher
- Churchill
- Churchville
- Cicero
- Cider Creek
- Cinnamon Creek, Will County
- Cisco
- Cissna Park
- Citation Lake
- Cityfront Center
- Cityfront Place
- Civer (historical)
- Clare
- Claremont Cottages
- Clarence
- Clarendon Hills
- Claridge Estates
- Clarion
- Clarkdale
- Clarke City
- Clarke's Subdivision
- Clarks Mobile Home Park
- Clarksville
- Claus
- Claypool
- Claypool Woods
- Clayton
- Claytonville
- Clearing
- Cleaverville
- Clements
- Cleveland
- Cleveland Subdivision
- Clifton
- Clinton
- Clintonville
- Cloverdale, DuPage County
- Cloverdale, Tazewell County
- Clow Creek Farm
- Clyde
- Coal City
- Coal Hollow
- Coal Valley
- Coaler
- Coalton
- Coalville
- Coatsburg
- Cobblewood
- Cobden
- Colby Point
- Colchester
- Coldbrook
- Coleman
- Coleta
- Colfax
- Collins (historical)
- Collinsville
- Collison
- Colmar
- Colona
- Colonial Acres
- Colonial Gardens, Cook County
- Colonial Gardens, Winnebago County
- Colonial Meadows
- Colonial Village, Cook County
- Colonial Village, Will County
- Columbia
- Colusa
- Colvin Park
- Combs
- Como
- Compton
- Congerville
- Conleys Patch
- Conover
- Cookes Subdivision
- Cooksville
- Cooper
- Copperfield
- Coral
- Coral Manor
- Cordova
- Coreys Bluff
- Cornell, Livingston County
- Cornell, Cook County
- Cortland
- Corwith
- Cotswald Subdivision
- Coughlin
- Council Hill
- Country Acres Mobile Manor
- Country Air Mobile Home Estates
- Country Club Estates
- Country Club Hills
- Country Hills
- Country Meadows
- Country Oaks
- Country Squire
- Country View Estates
- Countryside, Cook County
- Countryside, Kendall County
- Countryside East
- Countryside West
- County Glen
- Covell
- Covenant Village
- Coventry Creek
- Coventry Heights
- Coventry Hills
- Coventry Hills East
- Coyne
- Coyne Center
- Coynes
- Cozy Corner
- Cragin
- Crainville
- Cramer
- Crandall
- Crane Road Estates
- Crane Woods Estates
- Crawford
- Crawford Corners
- Crawford Countryside
- Creamery Corners
- Creekside
- Creekside of Long Grove
- Creekwood
- Crescent
- Crescent City
- Crest Estates
- Crest Hill
- Creston
- Crestview Knolls
- Crestwood
- Crestwood Acres
- Crete
- Creve Coeur
- Croft
- Cropsey
- Crossing
- Cruger
- Crystal Gardens
- Crystal Lake
- Crystal Lake Estates
- Crystal Lawns
- Crystal Manor
- Crystal Vista
- Cuba, Fulton County
- Cuba, Lake County
- Cullom
- Culton (historical)
- Culver
- Curtis
- Custer
- Custer Park
- Cutmer
- Cuyler
- Daggett (historical)
- Dahinda
- Dailey
- Dakota
- Dallas City
- Dalzell
- Damascus
- Damon
- Dana
- Dana Court Subdivision
- Danforth
- Danvers
- Danville
- Danway
- Darien, DuPage County
- Darrow
- Dauphin Park
- Davis
- Davis Junction
- Dawn Wood
- Daysville
- Dayton, Henry County
- Dayton, LaSalle County
- De Land
- De Soto
- De Witt
- Dean-Horsch Subdivision
- Dearborn Homes
- Deboer Woods
- Decatur
- Decorra
- Deer Chase
- Deer Creek
- Deer Grove
- Deer Lake
- Deer Lake Meadows
- Deer Park, LaSalle County
- Deer Park, Lake County
- Deer Run, Kane County
- Deer Run, Will County
- Deer Run Estates
- Deercrest Estates
- Deerfield
- Deerpath
- Deerpath Estates
- Deers
- Dehne's Subdivision
- DeKalb
- Del Mar Woods
- Delavan
- Delbert Egan Housing Project
- DeLong
- Delrey
- Denmark (historical)
- Dennison
- Denny (historical)
- Denrock
- Denver
- Depler Springs
- Depue
- Derby
- Derby Hills
- Derby Meadows
- Des Plaines
- Deselm
- Dewey
- Diamond
- Diamond Lake
- Dickerson
- Dickeys
- Dillon
- Dillonfield
- Dillsburg
- Dimmick
- Disco
- Divernon
- Divine
- Dixmoor
- Dixon
- Doctor Parker Place
- Doddsville
- Dolands Addition
- Dolton
- Doney
- Donny Hill Meadows
- Donovan
- Donovan Glen Subdivision
- Dorothy Stirling Subdivision
- DorothyStirling Estates
- Douglas, Knox County
- Douglas, Cook County
- Douglas Park
- Dover
- Dover Pond
- Downers Grove
- Downing Street Subdivision
- Downs
- Drafke
- Drexel Estate
- Driftwood
- Druce Lake
- Drummond
- Du Quoin
- Ducktown
- Duncan
- Duncan Mills
- Duncans Addition
- Dundee Road Acres
- Dunes Park
- Dunfermline
- Dunham Castle
- Dunlap
- Dunn Corners
- Dunning
- Dunsten Green
- Dupo
- Durand
- Durham
- Dwight
- Eagle Lake
- Eagle Point
- Eagle Ridge
- Earlville
- East Alton
- East Brooklyn
- East Clinton
- East Dubuque
- East Dundee
- East Galesburg
- East Garfield Park
- East Grossdale
- East Hazel Crest
- East Joliet
- East Lawndale
- East Lynn
- East Moline
- East Paw Paw
- East Peoria
- East Saint Louis
- East Side
- East Stockton (historical)
- East Village
- Eastburn
- Easton
- Eastwood Manor
- Ebner
- Echo Lake
- Eckard
- Eddy
- Edelstein
- Eden
- Edgebrook
- Edgebrook Mobile Home Park
- Edgecreek Estates
- Edgetown
- Edgewater
- Edgewood
- Edgewood Grove
- Edgington
- Edinburg
- Edison Park
- Edmund F Burton Row Houses
- Edwards
- Edwardsville
- Effingham
- Egan
- Egandale
- Eileen
- El Paso
- El Vista
- Elba Center
- Elburn
- Eldena
- Elderville
- Eldorado
- Eldridge
- Eleanor
- Eleroy
- Elgin
- Eliza
- Elizabeth
- Elizabethtown
- Elk Grove
- Elk Grove Village
- Elkhart
- Elkhorn Grove
- Elliott
- Ellis
- Ellison (historical)
- Ellisville
- Ellsworth, McLean County
- Ellsworth, Cook County
- Elmhurst
- Elmira
- Elmore
- Elmoville
- Elmwood, Peoria County
- Elmwood, Lake County
- Elmwood Park
- Elsdon
- Elva
- Elvaston
- Elwood
- Emden
- Emerald Acres
- Emerald Park
- Emerson
- Emington
- Empire
- Empire Hills
- Enchanted Gardens Mobile Home Park
- Energy
- Englewood
- Enion
- Enright
- Eola
- Epplyanna
- Equestrian Estates
- Equestrian Woods
- Erie
- Erin
- Erin Hills
- Erwin
- Esmond
- Essex, Kankakee County
- Essex, Cook County
- Essex, Will County
- Estates of Charlemagne
- Estates of Indian Creek
- Estates of Stone Creek
- Eugene
- Eureka
- Evans, Marshall County
- Evans, Logan County
- Evans Heights Housing Project
- Evanston
- Evanswood
- Evarts
- Everett
- Evergreen Park
- Evergreen Subdivision
- Evergreen Village Mobile Home Park
- Exline
- Exposition View
- Eylar
- Factory Addition
- Fair Acres
- Fair Haven
- Fair Meadows
- Fair Oaks, Kane County
- Fair Oaks, Cook County
- Fairbury
- Fairdale
- Fairfax Village
- Fairfield, Lake County
- Fairfield, Wayne County
- Fairfield Estates
- Fairmont
- Fairmont City
- Fairmount
- Fairview
- Fairview Heights
- Fairway Estates
- Faithorn
- Family Manufactured Home Community
- Fandon
- Far View
- Farm Ridge
- Farm View Hills
- Farmdale
- Farmer City
- Farmington, Fulton County
- Farmington, Kane County
- Farmington, Lake County
- Farmington, Will County
- Farmsville (historical)
- Fenton
- Ferndale
- Ferndale Woods
- Fernway
- Fernway Park
- Ferris
- Ferson Creek Woods
- Fiatt
- Fields of Saratoga
- Fifty Acres
- Film Row
- Fisher
- Fitchmoor
- Fithian
- Five Island Park
- Five Points, DeKalb County
- Five Points, Lake County
- Flagg
- Flagg Center
- Flanagan
- Flatville
- Fletcher
- Flickerville
- Flora
- Floral Terrace Estates
- Florence
- Florian
- Florid
- Flossmoor
- Flossmoor Highlands
- Flowerfield
- Fogarty
- Fond du Lac, Tazewell County
- Fond du Lac, Will County
- Foosland
- Ford Heights
- Forest City
- Forest Glen
- Forest Green Lake Estates
- Forest Hill
- Forest Hills
- Forest Hills Village
- Forest Lake
- Forest Manor
- Forest Park, Cook County
- Forest Park, Will County
- Forest River
- Forest View
- Forest View Estates
- Forestville
- Forrest
- Forreston
- Forsyth
- Fort Dearborn Addition
- Fort Hill
- Forty Acres
- Fossland
- Fountain Creek
- Fountain Green
- Fournins Subdivision
- Fowler
- Fox
- Fox Chase Estates
- Fox Hedge
- Fox Hills
- Fox Lake
- Fox Lake Hills
- Fox Meadow
- Fox Point North
- Fox River Estates
- Fox River Grove
- Fox River Heights
- Fox River Shores
- Fox Run
- Foxborough Estates
- Foxcroft, DuPage County
- Foxcroft, Lake County
- Foxfield
- Foxley Acres
- Foxridge Farms
- Frahms Country Acres
- Frances Cabrini Homes
- Frankfort
- Frankfort Square
- Franklin Corners
- Franklin Gardens
- Franklin Grove
- Franklin Park
- Franklinville
- Franks
- Fravert
- Frederick
- Freeburg
- Freedom Centre (historical)
- Freedville
- Freeman
- Freeport
- Fremont Center
- Frielings
- Fritchens Subdivision
- Frontenac
- Fruitland
- Fuller Park
- Fullersburg
- Fullerton
- Fulls
- Fulton
- Fulton Center (historical)
- Funks Grove
- Gage Park
- Gages Lake
- Galena
- Galena Junction
- Galesburg
- Galesville
- Galewood
- Galt
- Galva
- Gano
- Garber
- Garden Court
- Garden Homes
- Garden of Eden
- Garden Plain
- Garden Prairie
- Gardena
- Gardner
- Garfield
- Garfield Manor
- Garfield Ridge
- Garfields
- Garibaldi Square
- Gary
- Gaslight Village
- Gears Ferry
- Gem Suburban Manufactured Housing Community
- Geneseo
- Genet
- Geneva
- Geneva Road
- Genoa
- Georgetown, Carroll County
- Georgetown, McDonough County
- Georgetown, Vermilion County
- Gerald
- Gerlaw
- German Corner
- German Valley
- Germantown
- Germantown Hills
- Giblin
- Gibson City
- Gifford
- Gilberts
- Gilchrist, Fulton County
- Gilchrist, Mercer County
- Gillespie
- Gilletts
- Gillum
- Gilman
- Gilmer
- Gilson
- Ginger Hill
- Gingle Corners
- Girard
- Gladstone, Henderson County
- Gladstone, Cook County
- Glasford
- Glen Avon
- Glen Carbon
- Glen Ellyn
- Glen Oak
- Glenbrook Acres West
- Glenbrook Countryside
- Glenburn
- Glencoe
- Glendale
- Glendale (historical)
- Glendale Heights
- Glenn
- Glenview
- Glenwood
- Globe
- Glover
- Godfrey
- Godley
- Goeselville
- Golconda
- Gold Coast
- Golden
- Golden Acres
- Golden Meadow Estates
- Golden Oak Estates
- Golf
- Gombis
- Good Hope
- Goode Subdivision
- Goodenow
- Goodfield
- Goodings Grove
- Goodrich
- Goodwine
- Goofy Ridge
- Goreville
- Gorman
- Gorman Farm
- Gottfred Subdivision
- Gougars
- Grace Abbott Homes
- Grace Manor
- Grand Boulevard
- Grand Crossing
- Grand Detour
- Grand Haven
- Grand Prairie
- Grand Ridge
- Grandview
- Grandwood Park
- Graney
- Grange Hall
- Granite City
- Grant Park, Kankakee County
- Grant Park, Winnebago County
- Grant View Heights
- Grant Village
- Granville
- Granville Gardens
- Grape Creek
- Grass Lake
- Graver Country Estates
- Grayland
- Graymont
- Graymoor
- Grayslake
- Grayville
- Great Lakes
- Greater Grand Crossing
- Green Bay
- Green Oaks
- Green River
- Green Rock
- Green Valley
- Green View Heights
- Greenbriar
- Greenbriar Highlands
- Greenbush
- Greendale
- Greenfield
- Greenoak
- Greenridge Estates
- Greenup
- Greenview
- Greenview Estates
- Greenville
- Greenwich
- Greenwood, McHenry County
- Greenwood, Cook County
- Greer
- Gretna
- Gridley
- Griffin
- Griffiths Mobile Home Park
- Griggsville
- Grimes Addition
- Griswold
- Gross Point
- Grove
- Groveland
- Grumle Corner
- Guilford
- Gulfport
- Gurnee
- Guthrie
- Hadley
- Haegers Bend
- Hahnaman
- Hainesville
- Haldane
- Hale Ridge (historical)
- Haley Meadows
- Half Day
- Hallock
- Hallsville
- Hamilton
- Hamilton Corners
- Hamilton Estates
- Hamlet
- Hamlin Park
- Hampshire
- Hampton
- Hampton Park
- Hanna City
- Hannon Mobile Home Park
- Hanover
- Hanover Park
- Hansen Subdivision
- Hanson Park
- Happy Hills
- Harbor Square
- Hardin
- Harding
- Harlem
- Harmon
- Harmony
- Harness
- Harper
- Harpster
- Harris
- Harris Corners
- Harrisburg
- Harrison
- Harrison Avenue Gardens
- Harrisonville
- Harristown
- Harrisville
- Hartford
- Hartland
- Hartsburg
- Hartshorn
- Harvard
- Harvard Hills
- Harvest Glen
- Harvey
- Harwood Heights
- Hastings, Cook County
- Hastings, Kane County
- Havana
- Hawkins Glen
- Hawley (historical)
- Hawthorn Knolls
- Hawthorn Woods
- Hawthorne Hills
- Hazel Crest
- Hazel Green
- Hazelhurst
- Heapsville
- Heart O' Northbrook
- Heather Highlands
- Heather Sound
- Heatherbrook Estates
- Heathercrest
- Heatherfield
- Heatherlea
- Heatherstone
- Heaton
- Heaton Park
- Hebron
- Hedgerow
- Hedgewood
- Hegeler, Bureau County
- Hegeler, Vermilion County
- Hegewisch
- Helmar
- Henderson
- Henderson Grove
- Hendrix
- Henkel
- Hennepin
- Henning
- Henry
- Herbert
- Heritage Creek
- Heritage Estates
- Heritage Knolls
- Heritage Lake
- Heritage Lake Estates
- Heritage Meadows
- Heritage Place, Will County
- Heritage West
- Hermon
- Hermosa
- Heron View Estates
- Herons Crossing
- Herrin
- Herscher
- Heyworth
- Hi-Way Mobile Home Park
- Hickman
- Hickory Corners
- Hickory Creek
- Hickory Grove
- Hickory Hills, Cook County
- Hickory Hills, Henry County
- Hickory Hills, Lake County
- Hickory Leaf Mobile Home Park
- Hickory Oaks
- Hickory Point
- Hickory Ridge
- Hickory View Estates
- Hicks Corners
- Hidden Creek Estates
- Hidden Hill
- Hidden Lake
- Hidden Lakes
- Hidden Valley, Lake County
- Hidden Valley, Will County
- Higginsville
- High Meadow
- High Point
- Highcrest
- Highland
- Highland Estates
- Highland Haven
- Highland Hills
- Highland Park
- Highland Town (historical)
- Highland Woods
- Highlands
- Highmoor
- Highview
- Highway Village
- Highwood
- Hillcrest
- Hillcrest Mobile Home Park
- Hillery
- Hills Grove (historical)
- Hillsboro
- Hillsdale
- Hillside
- Hillside Court
- Hillside Manor
- Hilltop
- Hilltop Trailer Park
- Himrod
- Hinckley
- Hines
- Hinsdale
- Hitt, Carroll County
- Hitt, LaSalle County
- Hodgkins
- Hoffman Estates
- Holbrook
- Holcomb
- Holcombville Corners
- Holder
- Holiday Acres Mobile Home Park
- Holiday Hills
- Holiday Shores
- Hollis
- Hollowayville
- Holmes
- Homberg
- Home Run
- Homefinders
- Homer
- Homer Glen
- Hometown
- Homeward Hill
- Homewood
- Honey Creek
- Honeymoon Row
- Honeytree
- Hooper
- Hoopeston
- Hooppole
- Hope
- Hopedale
- Hopewell
- Hopkins Park
- Hopper
- Horatio Gardens
- Horton
- Howard
- Howard District
- Howe Terrace
- Hubbard Woods
- Hubly
- Hudson
- Humboldt
- Humboldt Park
- Hunt Club
- Hunt Corners
- Hunter
- Hunters Ridge
- Hunters Trail
- Huntington
- Huntley
- Huntsville
- Hustle
- Hutchins Park
- Hyde Park
- Ida B Wells Housing Project
- Ideal
- Idlewild
- Idylside
- Illiana
- Illiana Heights
- Illinois City
- Illinois Park
- Ina
- Indian Boundary
- Indian Chase Meadows
- Indian Creek, Kane County
- Indian Creek, Lake County
- Indian Creek Country Estates
- Indian Head Park
- Indian Hill
- Indian Oaks, Kankakee County
- Indian Oaks, Will County
- Indian Ridge
- Indian Spring
- Indian Trails
- Indian Village
- Industry
- Ingalls Park
- Ingalton
- Ingleside
- Ingleside Shore
- Inlet
- Innisfail
- Inverness
- Iowa Junction
- Ipava
- Irene
- Irondale
- Irondale (historical)
- Ironworkers Addition to South Chicago
- Iroquois
- Irving Park
- Irwin
- Island Lake
- Italian Bowery
- Itasca
- Ivanhoe, Lake County
- Ivanhoe, Will County
- Ivy Club of Northbrook
- J and J Mobile Home Park
- J D Carney Mobile Home Park
- Jackson Park Highlands
- Jackson Park Terrace
- Jacksonville
- Jamesburg
- Jane Addams Homes
- Jefferson Corners
- Jefferson Park
- Jeffery Manor
- Jenkins
- Jerome
- Jerseyville
- Jessical Lane Subdivision
- Jewell Road
- Jim Davis Mobile Home Park
- Joetta
- Johnsburg
- Johnsonville
- Johnston City
- Joliet
- Jonesboro
- Jonesville, LaSalle County
- Jonesville, Winnebago County
- Joslin
- Joy
- Juanitas Mobile Home Park
- Judson (historical)
- Julien Hill
- Justice
- Kaneland Estates
- Kaneville
- Kangley
- Kankakee
- Kappa
- Kasbeer
- Katy Did
- Kay - Lou Trailer Courts
- Kedron (historical)
- Keeler (historical)
- Keeneyville
- Keithsburg
- Keller
- Kelley Corners
- Kellyville
- Kelsey
- Kelvyn Grove
- Kempton
- Kenilworth
- Kennedy
- Kenney
- Kennicott Place
- Kensington, Cook County
- Kensington, Will County
- Kensington Club
- Kent
- Kentland
- Kenwood, Champaign County
- Kenwood, Cook County
- Kernan
- Kerrick
- Kewanee
- Kickapoo, Peoria County
- Kilbourne
- Kildeer
- Killgubbin
- Kilpatricks Mobile Home Park
- Kimberleigh
- Kincaid
- Kinchester Lane Subdivision
- King Acres
- Kingdom
- Kings
- Kings Island
- Kings Mill
- Kings Park
- Kingsport Court
- Kingston
- Kingston Mines
- Kingstone Hills
- Kinseys Little Farms
- Kinsman
- Kinswept Subdivision
- Kinzies Addition
- Kirkland
- Kirkwood
- Kishwaukee
- Kishwaukee Glen
- Kishwaukee Subdivision
- Kittredge
- Klondike
- Knob Hill
- Knoll Creek West
- Knollwood, Lake County
- Knollwood Estates Mobile Home Park
- Knox
- Knoxville
- Koster
- Kumler
- Kylemore
- Kyte Side Estates
- L'Erable
- La Crosse
- La Fox
- La Grange
- La Grange Park
- La Harpe
- La Hogue
- La Moille
- La Prairie
- La Rose
- La Salceda Subdivision
- La Salle
- La Vingnes Acres
- Lace
- Lacon
- Ladd
- Lafayette
- LaGrange
- Lake
- Lake Barrington
- Lake Bluff
- Lake Camelot
- Lake Catherine
- Lake Charlotte
- Lake Corner
- Lake Forest
- Lake Holiday
- Lake in the Hills
- Lake Meadows
- Lake of the Woods, Champaign County
- Lake of the Woods, Will County
- Lake Park Estates
- Lake Petersburg
- Lake Summerset
- Lake View
- Lake View Highlands
- Lake Villa
- Lake Zurich
- Lake Zurich Estates
- Lake Zurich Heights
- Lake Zurich Highlands
- Lake Zurich Manor
- Lakemoor
- Lakeshire
- Lakewood, DuPage County
- Lakewood, Mason County
- Lakewood, McHenry County
- Lakewood Estates, Lake County
- Lakewood Estates, Will County
- Lakewood Falls
- Lakewood Ridge
- Lakewood Shores
- Lamone Village
- Lanark
- Lancaster
- Landwehr Estates
- Lane
- Lane Park
- Langham
- Langley
- Lansing
- LaPlace
- Larchland
- Larkins Pointe
- Latham Park
- Laura
- Laurette
- Lavergne
- Lawn Ridge
- Lawndale
- Lawrence
- Lawrenceville
- Le Roy
- Leaf River
- Lebanon
- LeClaire Courts
- Lee
- Lee Acres
- Lee Center
- Lee Woods
- Leeds
- Leesburg
- Leesville
- Lehigh
- Leithton
- Leland
- Leland Grove
- Lemont
- Lena
- Leon Corners
- Leonard
- Leonore
- Level Acres
- Levelview Acres
- Leverett
- Lewistown
- Lexington
- Liberty Grove
- Libertyville
- Lidice
- Lightsville
- Lilly
- Lily Cache
- Lily Lake
- Lilydale
- Lilymoor
- Lima
- Limerick
- Limestone
- Lincoln
- Lincoln Estates
- Lincoln Heights
- Lincoln Park
- Lincoln Square
- Lincolnshire, Lake County
- Lincolnshire, Will County
- Lincolnwood
- Lincolnwood Hills
- Lindberg Park
- Linden Ridge
- Lindenhurst
- Lindenwood
- Lindskolds Subdivision
- Linview
- Lisbon
- Lisbon Center
- Lisbon North
- Lisle
- Litchfield, Kankakee County
- Litchfield, Montgomery County
- Little America
- Little Hell
- Little Ireland (historical)
- Little Oklahoma
- Little Orchard Subdivision
- Little Rock
- Little Rock (historical)
- Little Sicily
- Little York
- Littleton
- Littleville (historical)
- Liverpool
- Lloyd Whale Subdivision
- Lochanora
- Lockport
- Lockport Heights
- Locks
- Loda
- Lodemia
- Lodge
- Log Cabin Camp
- Logan Square
- Lomax
- Lombard
- Lombard Tree
- Lombardville
- London Mills
- Lone Tree
- Lone Tree Corners
- Lone Tree Subdivision
- Lonesome Acres
- Long Branch, Saline County
- Long Branch, Mason County
- Long Creek
- Long Grove
- Long Grove Valley
- Long Lake
- Long Point
- Long Run Acres
- Long Run Creek
- Long Shore Park
- Longview Estates
- Loon Lake
- Loose Pulley Junction
- Loraine
- Loran
- Lorenzo
- Loretto
- Lori-Sue Subdivision
- Lost Nation
- Lostant
- Lotus
- Lotus Woods
- Louisville
- Love
- Loveland's Subdivision
- Loves Park
- Lovington
- Low Point
- Lowell
- Lower West Side
- Lucas
- Ludlow
- Luther
- Lyndon
- Lynn Center
- Lynwood, Cook County
- Lynwood, Kendall County
- Lyons
- Machesney Park
- Mackinaw
- Mackinaw Dells
- Macomb
- Macon
- Madison
- Magnolia
- Mahomet
- Malden
- Malibu Bay
- Mallard Creek
- Mallard Lake Estates
- Mallard Lake North
- Mallard Lake South
- Malta
- Malvern
- Mammoth Springs
- Mancuso Village Park
- Mandell
- Manhattan
- Manito
- Manley
- Manlius
- Mannon
- Mansfield
- Manteno
- Manus North Shore Estates
- Manville
- Maple Leaf Estates
- Maple Leaf Mobile Home Park
- Maple Park
- Maple Ridge
- Maples Mill
- Mapleton
- Maplewood
- Maplewood Courts
- Maquon
- Marbletown
- Marcelline
- Marcus
- Marden Estates
- Marengo
- Marietta
- Marilyn's Estates
- Marion
- Marion Mobile Home Village
- Marissa
- Mark
- Markham, Morgan County
- Markham, Cook County
- Markus Subdivision
- Marlen Subdivision
- Marley
- Maroa
- Marquette
- Marquette Heights
- Marquette Manor
- Marquettes Landing
- Marseilles
- Marshall
- Marshall Field Garden Apartments
- Marston
- Martin (historical)
- Martin Luther
- Martinsville
- Martinton
- Mary Meadows
- Maryland
- Maryland Subdivision
- Maryville
- Marywood
- Mascoutah
- Mason City
- Massbach
- Matanzas
- Matanzas Beach
- Matherville
- Matteson
- Mattoon
- Maxwell
- Mayfair, Tazewell County
- Mayfair, Cook County
- Maytown
- Mayview
- Maywood
- Maywood Manor
- Mazon
- Mazonia
- McCall
- McConnell
- McCook
- McCormickville
- McCulley Subdivision
- McCullom Lake
- McDowell
- McGirr
- McHenry
- McHenry Shores
- McKenna Woods
- McKinley Park
- McLean
- McLeansboro
- McNabb
- McNulta
- McQueen
- Meadow Green
- Meadowdale Estates
- Meadowridge
- Meadows
- Meadowview
- Media
- Medinah
- Melody
- Melrose Park
- Melugin Grove (historical)
- Melvin
- Mendon
- Mendota
- Menominee
- Meredith
- Meredosia
- Meriden
- Merna
- Merrionette Manor
- Merrionette Park
- Metamora
- Metropolis
- Mettawa
- Mexico
- Meyer
- Meyer's Subdivision
- Michealsen Subdivision
- Michigan Beach
- Mid-North District
- Middle Creek
- Middlebury
- Middlecreek
- Middlegrove
- Middletown
- Midland City
- Midlothian
- Midway, Tazewell County
- Midway, Vermilion County
- Midway (historical)
- Milan
- Milford
- Milla
- Millbrig (historical)
- Millbrook
- Millburn
- Milledgeville
- Millersburg
- Millhurst
- Millington
- Millsdale
- Millstadt
- Millville
- Milo
- Milroy
- Mindale, Schuyler County
- Mindale, Tazewell County
- Mineral
- Mineral Springs (historical)
- Minier
- Minonk
- Minooka
- Mira
- Mirage
- Missal
- Mission Hills Estates
- Missionfield
- Mitchell
- Mitchells Subdivision
- Mobil-Land Trailer Park
- Modena
- Mokena
- Moline
- Momence
- Monaville
- Monee
- Monica
- Monmouth
- Monroe Center
- Montclare
- Monterey
- Montgomery
- Monticello
- Montrose
- Moorefield Estates
- Moores Corner
- Mooseheart
- Moran Corners
- Morehaven
- Moreland
- Morgan Park
- Moronts
- Morris
- Morris Kennedy Subdivision
- Morrison
- Morrisonville
- Morristown, Henry County
- Morristown, Winnebago County
- Morse
- Morseville
- Morton
- Morton Grove
- Moscow (historical)
- Mossville
- Motor Heights
- Mound City
- Mount Carmel
- Mount Carroll
- Mount Greenwood
- Mount Morris
- Mount Olive
- Mount Palatine
- Mount Pleasant
- Mount Prospect
- Mount Pulaski
- Mount Sterling
- Mount Vernon
- Mount Zion
- Mountjoy
- Moweaqua
- Mulford Highlands
- Muncie
- Mundelein
- Munger
- Munson (historical)
- Munster
- Murphysboro
- Mutimer Subdivision
- Myersville (historical)
- Mylith Park
- Myrtle
- Nachusa
- Naperville
- Naplate
- Nashville
- Native Prairie
- Natrona
- Nauvoo
- Near North Side
- Near South Side
- Nearwest Side
- Nekoma
- Nelson
- Neoga
- Neponset
- Nettle Creek
- Nevada
- New Athens
- New Auburn
- New Baden
- New Bedford
- New Berlin
- New Boston
- New Castle (historical)
- New City
- New Holland
- New Lancaster (historical)
- New Lebanon
- New Lenox
- New Michigan (historical)
- New Milford
- New Patch
- New Philadelphia
- New Windsor
- Newark
- Newell
- Newmansville
- Newton
- Newton Corners
- Newtown
- Niles
- Niota
- Nokomis
- Nora
- Norma
- Normal
- Normandy
- Normandy Heights
- Normandy Hill
- Normantown
- Norridge
- Norris
- Norris City
- North Aurora
- North Barrington
- North Caledonia (historical)
- North Center
- North Chicago
- North Chillicothe
- North Edgewater
- North Englewood
- North Evanston
- North Glen Ellyn
- North Hampton
- North Hanover
- North Harvey
- North Henderson
- North Hooper
- North Lawndale
- North Northfield
- North Park, Winnebago County
- North Park, Cook County
- North Pekin
- North Peoria
- North Plato
- North Pointe
- North Pullman
- North Riverside
- North Shore
- 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
- Northfield, Cook County
- Northfield, Will County
- Northfield Acres
- Northfield Woods
- Northgate Estates
- Northlake
- Northmeadow Village Trailer Park
- Northville
- Northway
- Northwood Edens
- Norway
- Norwood, Mercer County
- Norwood, Peoria County
- Norwood Park
- Nottingham Manor
- Nottingham Ridge
- Nottingham Woods
- Novak Park
- O'Fallon
- O'Hare
- Oak Brook
- Oak Forest
- Oak Grove, Lake County
- Oak Grove, Rock Island County
- Oak Grove, Cass County
- Oak Hill
- Oak Lane
- Oak Lawn
- Oak Lawn Mobile Home Park
- Oak Openings
- Oak Park
- Oak Park Township
- Oak Ridge, Woodford County
- Oak Ridge, Lake County
- Oak Ridge North
- Oak Run
- Oak Valley
- Oakbrook Estates Mobile Home Park
- Oakbrook Terrace
- Oakenwald
- Oakford
- Oakglen
- Oakland
- Oakland Center
- Oakton
- Oakwood
- Oakwood Estates
- Oakwood Hills
- Oasis Mobile Home Park
- Oasis Trailer Park
- Oblong
- Ocoya
- Odell
- Odin
- Ogden
- Ogle
- Oglesby
- Ohio
- Okawville
- Old Colony Court
- Old Gilchrist
- Old Kent
- Old Mill Creek
- Old Mill Grove
- Old Niota
- Old Oaks
- Old Oaks Estates
- Old Sawmill
- Olena
- Olin
- Oliver
- Oliver Lane Subdivision
- Olney
- Olsen-Hansen Row Houses
- Olson's Subdivision
- Olympia Fields
- Onarga
- Oneco
- Oneida
- Ontario
- Ontarioville
- Ophiem
- Oquawka
- Orange Prairie
- Orangemans Hall
- Orangeville
- Orchard Subdivision
- Oregon
- Orion
- Orland Hills
- Orland Park
- Ormonde
- Osborn
- Osceola
- Osco
- Osman
- Ospur
- Oswego
- Ottawa
- Otter (historical)
- Otto
- Otto (historical)
- Ottville
- Oury Point
- Owen Center
- Oxford (historical)
- Pacific Junction
- Packingtown
- Padua
- Palatine
- Palestine
- Palisades
- Palm Beach
- Palmerton
- Palmyra
- Paloma
- Palos Heights
- Palos Hills
- Palos Park
- Pana
- Panola
- Panorama Valley
- Papineau
- Paradise Acres Manufactured Home Community
- Paris
- Park City
- Park Forest
- Park Hill
- Park Manor, Cook County
- Park Manor, Christian County
- Park Meadowlands West Mobile Home Court
- Park Place
- Park Place Estates of Northbrook
- Park Ridge
- Park Row
- Parkland
- Parkside
- Parnell
- Pattonsburg
- Pauline
- Pauls Friendly City Mobile Home Park
- Pavillion
- Pavinita
- Paw Paw
- Pawnee
- Paxton
- Paynes Point
- Payson
- Paytonville
- Pearl City
- Pebble Beach
- Pebble Creek
- Pecatonica
- Pekin
- Pekin Heights
- Pellville
- Penfield
- Pennington Point
- Pennock
- Penrose
- Peoria
- Peoria Heights
- Peotone
- Pepper Tree, Cook County
- Pepper Tree, Will County
- Perdueville
- Perryville
- Peru
- Petersburg
- Peterstown
- Petersville
- Peterville
- Pheasant Chase
- Pheasant Creek
- Pheasant Hollow N
- Pheasant Hollow S
- Pheasant Knolls
- Pheasant Landing
- Pheasant Run
- Phelps
- Phil-Aire Estates
- Philip Murray Homes
- Philo
- Phoenix
- Picardy
- Picardy Circle
- Pierces Park
- Pilot Center (historical)
- Pilsen
- Pinckneyville
- Pine Grove, Grundy County
- Pine Grove, Cook County
- Pine Hills Estates
- Pine Lake Circle
- Pine Manor
- Pine Meadow Estates
- Pine Needle
- Pine Valley
- Pine View
- Pinehurst Manor
- Pineview Hills
- Pingree Grove
- Pioneer
- Piper City
- Pistakee
- Pistakee Highlands
- Pitcherville (historical)
- Pitchin
- Pittsfield
- Pittwood
- Placerdale
- Plainfield
- Plainsman Terrace
- Plano
- Plantation
- Plato Center
- Plato Corners
- Plattville
- Pleasant Hill
- Pleasant Hill (historical)
- Pleasant Knoll
- Pleasant Ridge (historical)
- Pleasant Valley
- Pleasant View
- Plum Grove Village
- Plymouth
- Polk
- Polo
- Polsgrove
- Ponds
- Ponds of Plainfield
- Ponemah
- Pontiac
- Pontoon Beach
- Pontoosuc
- Poplar City
- Poplar Grove, Boone County
- Poplar Grove, Rock Island County
- Poplar Ridge
- Port Barrington
- Port Byron
- Portage
- Portage Park
- Porter Subdivision
- Porterfield
- Porters Glenview Subdivision
- Portland
- Posen
- Potomac
- Pottstown
- Poverty Ridge
- Poverty Row
- Powellton
- Powerton
- Prairie Avenue Courts
- Prairie Center
- Prairie City
- Prairie Courts
- Prairie Creek
- Prairie Grove
- Prairie Knoll
- Prairie Ponds
- Prairie Ridge
- Prairie Shores
- Prairie Trail
- Prairie View, Boone County
- Prairie View, Lake County
- Prairieview Estates
- Prairieville
- Pratt (historical)
- Preemption
- Prestbury
- Preston Heights
- Prestonfield
- Prince Crossing
- Princeton
- Princeville
- Proctor
- Prophetstown
- Prospect
- Prospect Heights
- Prospect Heights Addition
- Providence
- Puder
- Pulaski
- Pullman
- Putnam
- Quail Brook Estates
- Quail Grove
- Quail Run, Lake County
- Quail Run, Will County
- Quashquema (historical)
- Quentin Corners
- Quincy
- Quiver Beach
- Radley
- Radville
- Ragtown (historical)
- Rainbow Hills
- Rambling Hills
- Rambling Hills East
- Rambling Hills West
- Ramsey
- Ramsey Acres
- Ramsgate South
- Randall Hills
- Randolph
- Rankin
- Ransom
- Rantoul
- Rapatee
- Rapids City
- Rardin
- Raritan
- Ravens Wing
- Ravenswood
- Ravenswood Gardens
- Ravenswood Manor
- Ravenswood Place
- Ravinia
- Ravinia Park
- Rawalts
- Rawson Bridge
- Ray
- Raymond
- Raynor Park
- Rayville
- Reading
- Red Bud
- Red Haw Ridge
- Red Oak
- Reddick
- Redgate Ridge
- Reed Crossing
- Reeds
- Reeds Crossing (historical)
- Regal Acres
- Regency Place
- Reilly
- Reserve of Plainfield
- Reserves at Clearwater
- Resthaven
- Reynolds
- Rice
- Richards
- Richards Park
- Richardson
- Richmond, McHenry County
- Richmond, Tazewell County
- Richton Park
- Richwood Manor
- Ridgecrest
- Ridgecroft
- Ridgefield
- Ridgeland, Cook County
- Ridgeland Lakes Estates
- Ridgeville
- Ridgewood
- Ridott
- Ridott Corners
- Riley
- Ringwood
- Rio
- Ripley
- Rising
- Risk
- Ritchie
- River
- River Edge Estates
- River Forest, Cook County
- River Forest, Winnebago County
- River Glen
- River Grange Lakes
- River Grove, Cook County
- River Grove, Winnebago County
- River Oaks
- River Oaks West
- River Road Mobile Home Park
- River Woods
- River Woods Estates
- Riverbend
- Riverbrook Estates
- Rivercrest Estates
- Riverdale, Cook County
- Riverdale, Winnebago County
- Rivermist
- Riverside
- Riverside at Ole Canton Farm
- Riverside Mobile Home Estates
- Riverstream
- Riverton
- Riverview, Cook County
- Riverview Mobile Home Park
- Riverwalk
- Riverwood Estates
- Riverwoods
- Roanoke
- Robbins
- Robein
- Robert Brooks Homes
- Robert Taylor Homes (historical)
- Roberts
- Robinson
- Rochelle
- Rochester
- Rock City
- Rock Creek
- Rock Falls
- Rock Grove
- Rock Island
- Rock Island Arsenal
- Rock Run Park
- Rockdale
- Rockdale Junction
- Rockefeller
- Rockford
- Rockford Mobile Home Park
- Rockton
- Rodden
- Rogers Park
- Rolling Glen
- Rolling Greens Mobile Home Park
- Rolling Meadows
- Rollins
- Rollo
- Rombury Oaks
- Rome
- Romeo
- Romeoville
- Rondout
- Roodhouse
- Rooks Creek
- Roscoe
- Rose Hill Farms
- Rosecrans
- Roseland
- Roselle
- Rosemont
- Roseville
- Rosewood Heights
- Rosiclare
- Rossville
- Rossville Junction
- Round Grove
- Round Lake
- Round Lake Beach
- Round Lake Heights
- Round Lake Park
- Rowe
- Rowell
- Roxana
- Roxbury
- Royal
- Royal Acres Trailer Park
- Royal Court
- Royal Oaks Mobile Home Park
- Royal Ridge
- Royalton
- Royce Hill
- Rozenow's Subdivision
- Rozetta
- Ruby
- Rue Vallee
- Ruffled Feathers Golf Community
- Rugby
- Rugen Subdivision
- Rumpler
- Rushville
- Russell
- Russellville
- Rustic Acres
- Rutherford
- Rutland
- Ryan
- Sabina
- Saddle Brook Run
- Saddle Creek
- Saddlewood
- Sag Bridge
- Saidora
- Saint Anne
- Saint Anne Woods
- Saint Augustine
- Saint Charles
- Saint David
- Saint Elmo
- Saint George
- Saint Jacob
- Saint Joseph
- Saint Mary
- Saint Stephens Green
- Salceca North
- Salem, Stephenson County
- Salem, Marion County
- Salina
- Saluda
- Sammons Point
- Samuel A Rothermel Houses
- Samuelson Corners
- San Jose
- Sand Ridge
- Sanders Crossing
- Sanders Estates
- Sanders Prairie
- Sandoval
- Sands
- Sandwich
- Sanfordville (historical)
- Sankoty
- Saratoga
- Saratoga Center
- Sauganash
- Sauk Village
- Saunemin
- Savanna
- Savoy
- Saxon (historical), Henry County
- Saxon (historical), Livingston County
- Saybrook
- Sayles Manor
- Scales Mound
- Scarboro
- Schaeferville
- Schapville
- Schaufel Corners
- Schaumburg
- Schick
- Schiller Park
- Schnells Corner
- Schorsch
- Schrum
- Schultz's Subdivision
- Schwer
- Sciota
- Scioto Mills
- Scott Air Force Base
- Scotts Mill
- Scottsburg
- Scovel
- Scraper-Moecherville
- Seaton
- Seatonville
- Secor
- Sellers
- Seneca
- Sepo
- Serena
- Sesser
- Seville
- Seward
- Seymour
- Shabbona
- Shabbona Grove
- Shadow Lawn
- Shady Beach
- Shady Hollow
- Shale City
- Shamrock
- Shanghai City
- Shannon
- Shantytown
- Shaw
- Shawneetown
- Shaws
- Sheffield
- Shelburn (historical)
- Shelbyville
- Sheldon
- Sheldons Grove
- Shell Lake Estates
- Shenandoah
- Shepardson Subdivision
- Sherburnville
- Sheridan
- Sherman
- Sherman Corners
- Shermer Ridge
- Shermer Square
- Shermerville
- Sherrard
- Sherwood Oaks
- Shiloh
- Shirland
- Shirley
- Shokokon
- Shoo Fly
- Shorewood, DuPage County
- Shorewood, Will County
- Shorewood Beach
- Sibley
- Sidney
- Siemar Subdivision
- Sikkemas Trailer Park
- Silent Meadow
- Silver Glen Meadows
- Silver Hills
- Silver Lake
- Silver Lake (historical)
- Silvis
- Simons
- Six Corners
- Skare Estates
- Skelton
- Ski Hill
- Skiersch's Subdivision
- Skokie
- Skokie Highlands
- Skokie Junction
- Skokie Manor
- Slackwater (historical)
- Sleepy Hollow, Kane County
- Sleepy Hollow, Cook County
- Slocum Corners
- Smithdale
- Smithfield
- Smithshire
- Smithton
- Smithville
- Snicarte
- Snider
- Solar Grove
- Sollitt
- Solomon
- Solon Mills
- Somerfield
- Somerset Hills
- Somonauk
- Sonora (historical)
- Soperville
- South Addison
- South Barrington
- South Beloit
- South Bluff Homes
- South Branch Addition
- South Brighton
- South Chicago
- South Chicago Heights, Cook County
- South Commons
- South Danville
- South Deering
- South Edgewater
- South Elgin
- South Elkhorn
- South Elmhurst
- South Englewood
- South Evanston
- South Freeport
- South Harvey
- South Holland
- South Jacksonville
- South Kenwood
- South Lawndale
- South Lockport
- South Lynn
- South Ottawa (historical)
- South Park
- South Paw Paw
- South Pekin
- South Pole
- South Rome
- South Roxana
- South Shore
- South Streator
- South Wilmington
- Southbridge Commons
- Southern View
- Southgate
- Southgate Estates Trailer Park
- Southgate Park
- Southmoor
- Southport
- Spangler Farms
- Spaniel Woods
- Sparland
- Sparta
- Spaulding
- Spaulding Corners
- Speer
- Spencer
- Spires
- Split Rail Farm
- Sportmans Cove
- Spring Bay
- Spring Creek
- Spring Creek Settlement (historical)
- Spring Creek Woods
- Spring Green
- Spring Grove
- Spring Grove (historical)
- Spring Hill
- Spring Lake Mobile Home Park
- Spring Lake Woods
- Spring Valley, Bureau County
- Spring Valley, Whiteside County
- Spring View West
- Springfield
- Springwood
- Springwood South
- Squires
- Squires Mill
- Stadler Ridge Estates
- Stagecoach Hills
- Staley
- Standard
- Stanford
- Staples Corner
- Star Subdivision
- Stark
- Starks
- State Road
- Stately Acres
- Stately Oaks
- Stateway Gardens (historical)
- Staunton
- Stavanger
- Steele
- Steeleville
- Steelton
- Steger
- Stelle
- Stephenson Mobile Home Estates
- Sterling
- Steward
- Stewardsville (historical)
- Stewart Ridge
- Stickney
- Still Meadows
- Stillman Valley
- Stillwater
- Stillwell
- Stockdale
- Stockland
- Stockton
- Stoehrs
- Stone Hedge
- Stone Hedge Manor
- Stone Park
- Stonebrook
- Stonebrook East
- Stonegate, Cook County
- Stonegate, Will County
- Stonehedge Glen
- Stoneyville
- Stony Island
- Stony Island Heights
- Stratford
- Strawn
- Streamwood
- Streator
- Streeterville
- Stronghurst
- Sturbridge Village
- Sturm Subdivision
- Sublette
- Sugar Brook
- Sugar Grove, Kane County
- Sugar Grove, Mercer County
- Sugar Grove, Schuyler County
- Sugar Island
- Sullivan
- Sullivan Center (historical)
- Sulphur Springs
- Summerdale
- Summerfield
- Summerhill
- Summit
- Summum
- Sumner
- Sun River Terrace
- Sunbeam
- Sunbury
- Sunny Acres
- Sunny Crest
- Sunny Hill
- Sunny Hill Estates
- Sunnyland
- Sunnyside, McHenry County
- Sunnyside, Stephenson County
- Sunnyside, Cook County
- Sunridge
- Sunrise Ridge
- Sunset Court
- Sunset Fields
- Sunset Hills
- Sunset Ridge
- Sunset View Estates
- Sunset View Mobile Home Park
- Sunset Villa
- Surrey
- Surrey Woods
- Sutter, Tazewell County
- Sutter, Hancock County
- Sutton
- Sutton Point
- Swan Creek
- Swansea
- Swansway
- Swede Town
- Swedentown
- Swedona
- Sweet Home (historical)
- Sweetwater
- Swift
- Swygert
- Sycamore
- Sycamore Lane
- Sylvan Hills
- Sylvan Lake
- Sylvan Woods
- Symerton
- Table Grove
- Tabor
- Talbott
- Tall Oaks
- Tall Oaks Subdivision
- Tall Trees
- Tallmadge
- Tamara Heights
- Tamarack
- Tamarack Fairways
- Tampico
- Tanglewood
- Tanner Woods
- Taylor Ridge
- Taylors Addition to South Chicago
- Taylorville
- Tazewell
- Techny (historical)
- Tedens (historical)
- Teheran
- Tennessee
- Terra Cotta
- Terre Haute
- Teutopolis
- Thawville
- The Burg
- The Bush
- The Colonnades
- The Commons
- The Cottage
- The Courts
- The Fields
- The Galena Territory (The Galena Territory Census Designated Place)
- The Grove
- The Knolls
- The Landings
- The Meadows
- The Meadows of Virgil
- The Orchards
- The Willows
- The Woodland
- Third Lake
- Thomas, Bureau County
- Thomas, Vermilion County
- Thomasboro
- Thomson
- Thorn Hill
- Thorne Ledge
- Thornfield
- Thornley
- Thornton
- Thornton Junction
- Thunder Ridge
- Tiber Hill Estates
- Ticona
- Tiffany Estates
- Tilton
- Timber Lane
- Timber Ridge, McLean County
- Timber Ridge, Henry County
- Timber Ridge, Cook County
- Timber Ridge Mobile Home Park, Cook County
- Timber Ridge Mobile Home Park, Stephenson County
- Timber Trails
- Timbercrest
- Timberlane
- Timewell
- Tinley Park
- Tioga
- Tipton
- Tiskilwa
- Toledo
- Tolono
- Toluca
- Tomahawk Bluff
- Tomlinson
- Tonica
- Topeka
- Torino
- Toulon
- Towanda
- Tower Lake
- Towertown
- Towne Oaks
- Trailpark Gardens
- Tremont
- Trenton
- Trenton Corners
- Triumph
- Trivoli
- Troster
- Trout Valley
- Troxel
- Troy
- Troy (historical)
- Troy Grove
- Trumbull Park Homes
- Trumbull Park Terrace
- Truro
- Tuckaway Manor Mobile Home Park
- Tunbridge
- Turner Camp
- Tuscarora
- Tuscola
- Tuttle Farm
- Twelvemile Corner
- Twin Creek
- Twin Grove
- Twin Lakes
- Udina
- Ulah
- Undercliff
- Union, Logan County
- Union, Mason County
- Union, McHenry County
- Union, Will County
- Union Grove
- Union Hill
- Uniontown
- Unionville, Vermilion County
- Unionville, Whiteside County
- University Park, Cook County
- University Park, Will County
- University Village
- Upper Alton
- Uptown
- Urbana
- Ursa
- Ustick
- Utah
- Utica
- Utopia
- Valentine Manor
- Valley Creek (historical)
- Valley View, DuPage County
- Valley View, Kane County
- Valley View, Winnebago County
- Valley View Farm
- Valley Vista Estates
- Valmeyer
- Van Orin
- Van Peterson Subdivision
- Van Petten
- Vandalia
- Vandercook
- Vanland (historical)
- Varna
- Venetian Village
- Venice
- Vermilion City
- Vermilion Heights
- Vermilionville
- Vermont
- Vernal
- Vernon Hills
- Verona
- Victor A Olander Homes
- Victoria
- Victory Homes
- Vienna
- Villa Grove
- Villa Park
- Village of Campton Hills
- Village Square
- Villas North
- Villas of Northbrook
- Villas West
- Ville Du Parc
- Vintage
- Vintage Harvest
- Viola
- Virden
- Virgil
- Virgil (historical)
- Virginia
- Volo
- Volte Court
- Von Glen Acres
- Wacker
- Waddams Grove
- Wadsworth
- Wahl's Subdivision
- Waldo
- Waldron (historical)
- Walker
- Walkers Grove, Will County
- Wallin Woods
- Wallingford
- Walnut, Bureau County
- Walnut, Tazewell County
- Walnut Grove, McDonough County
- Walnut Grove, Putnam County
- Walnut Ridge
- Walnut Woods
- Waltham
- Walton
- Walz
- Wamac
- Wanlock
- Wapella
- Ward
- Warner
- Warren
- Warrenhurst
- Warrensburg
- Warrenville
- Warsaw
- Wasco
- Washburn
- Washington
- Washington Heights
- Washington Park, Cook County
- Washington Park, Saint Clair County
- Washington Park Court
- Wataga
- Water Edge Subdivision
- Waterford (historical)
- Waterloo
- Waterman
- Watertown
- Watkins
- Watseka
- Wauconda
- Waukegan
- Wauponsee
- Waverly
- Wayland
- Wayne, DuPage County
- Wayne, Kane County
- Wayne Center
- Wayne City
- Waynesville
- Webster, Hancock County
- Webster, Iroquois County
- Webster Park
- Wedges Corner
- Wedgewood
- Wedgewood Heights
- Wedron
- Weedman
- Welco Corners
- Weldon
- Weldwood Oaks
- Welland
- Weller's Subdivision
- Wellington
- Wellington Heights
- Wells Corners
- Wempletown
- Wendel
- Wenmoth Acres
- Wenona
- Wesglen
- Wesley
- Wesmere
- West Brooklyn
- West Chicago
- West Dundee
- West Edgewater
- West Elsdon
- West Englewood
- West Frankfort
- West Garfield Park
- West Hallock
- West Harvey
- West Highland Acres
- West Jersey
- West Junction
- West Kankakee
- West Lake Forest
- West Lawn
- West Miltmore
- West Newell
- West Peoria
- West Point
- West Pullman
- West Ravenwood
- West Ridge
- West Roseland
- West Town
- West Town Mobile Home Park
- Westbury
- Westchester
- Western Dunning
- Western Springs
- Westfield
- Westfield Corners
- Westlake
- Westmont
- Westmoreland
- Weston
- Weston (historical)
- Westview Acres
- Westville
- Wexford
- Wexford East
- Weybridge
- Wheatland Highlands
- Wheatland Plains
- Wheatland South
- Wheatland View
- Wheaton
- Wheeling
- Whiskey Point, Cook County
- Whiskey Row
- Whispering Pines
- Whisperwoods of Northbrook
- Whitaker
- White Birch Lakes
- White City
- White Hall
- White Heath
- White Pigeon
- White Plains
- White Rock
- White Willow (historical)
- Whitefield
- Whitton
- Wichert
- Wideview
- Wilbern
- Wilbur Heights
- Wilco Estates
- Wildebrook On The Green
- Wildrose
- Wildrose Valley
- Wildwood
- Wildwood Valley
- Wilkinson
- William Green Homes
- Williams Park
- Williams Trailer Court
- Williamsburg, Cook County
- Williamsburg, Will County
- Williamsburg Green
- Williamsburg Square
- Williamsfield
- Williamsville
- Willow
- Willow Cove
- Willow Creek, Kane County
- Willow Creek, Cook County
- Willow Creek Trailer Park
- Willow Grove
- Willow Ridge
- Willow Springs
- Willow Woods
- Willowbrook, DuPage County
- Willowbrook, Will County
- Willowbrook Acres
- Willows North
- Wilmette
- Wilmington
- Wilshire Terrace
- Wilsman
- Wilson, Lake County
- Wilton
- Wilton Center
- Winchester
- Winchester Estates
- Winchester Place
- Winchester-Hood Garden Homes
- Windenoak
- Windham
- Windham Manor
- Winding Creek
- Windmill Estates
- Windsor
- Windsor Park
- Winfield
- Wing
- Winkel
- Winnebago
- Winnebago Court
- Winnemac
- Winneshiek
- Winnetka
- Winschester Lane North
- Winslow
- Winston
- Winston Village
- Winston Woods
- Winthrop Harbor
- Winthrop Harbor Station
- Winthrop Village
- Wolcott Gardens
- Wolcotts and Bushnells Additions
- Wolf Creek Estates
- Wolf Creek Island
- Wolf Lake
- Wolfs
- Wonder Center
- Wonder Lake
- Wood Dale
- Wood Oaks Glen
- Wood River
- Woodbine, Jo Daviess County
- Woodbine, Will County
- Woodcrest, Henry County
- Woodcrest, Winnebago County
- Woodford
- Woodhull
- Woodlake
- Woodland, Iroquois County
- Woodland, Kankakee County
- Woodland Acres
- Woodland Addition
- Woodland Estates
- Woodland Hills, Kane County
- Woodland Hills, Whiteside County
- Woodland Junction
- Woodland Shores
- Woodland Valley Courts
- Woodlands
- Woodlawn
- Woodlawn Trailer Court
- Woodleaf
- Woodmere Subdivision
- Woodoaks Court
- Woodridge, Lake County
- Woodridge, DuPage County
- Woodruff
- Woodruff Corners
- Woods of Rivermist
- Woodstock
- Woodvale
- Woodville
- Woodworth
- Woosung
- Worden
- Worth
- Wyanet
- Wyoming
- Wyton
- Yates City
- Yeager
- Yellow Banks
- Yellow Creek
- Yeoward Addition
- York Center
- Yorkfield
- Yorktown
- Yorkville
- Youngsdale
- Youngstown
- Yuton
- Zearing
- Zeigler
- Zier Cors
- Zion