A list of Illinois state communities and their associated web pages.
- Gages Lake
- Galatia
- Galena
- Galesburg
- Galt
- Galva
- Garden Prairie
- Gardner
- Gays
- Geff
- Geneseo
- Geneva
- Genoa
- Georgetown
- Gerlaw
- German Valley
- Germantown Hills
- Gibson City
- Gifford
- Gilberts
- Gillespie
- Gilman
- Gilson
- Girard
- Gladstone
- Glasford
- Glen Carbon
- Glen Ellyn
- Glenarm
- Glencoe
- Glendale Heights
- Glenview
- Glenwood
- Godfrey
- Golconda
- Golden
- Golden Eagle
- Golden
- Gate
- Golf
- Good Hope
- Goodfield
- Goodwine
- Goreville
- Gorham
- Grafton
- Grand Chain
- Grand Detour
- Grand Ridge
- Grand Tower
- Granite City
- Grant Park
- Grantsburg
- Granville
- Graymont
- Grayslake
- Grayville
- Great Lakes
- Green Oaks
- Green Valley
- Greenfield
- Greenup
- Greenview
- Greenville
- Gridley
- Griggsville
- Groveland
- Gurnee
- Hagarstown
- Hainesville
- Hamburg
- Hamel
- Hamilton
- Hamletsburg
- Hammond
- Hampshire
- Hampton
- Hanna City
- Hanover
- Hanover Park
- Hardin
- Harmon
- Harrisburg
- Harristown
- Hartford
- Hartsburg
- Harvard
- Harvel
- Harvey
- Harwood Heights
- Havana
- Hawthorn Woods
- Hazel Crest
- Hebron
- Hecker
- Henderson
- Hennepin
- Henning
- Henry
- Herald
- Herod
- Herrick
- Herrin
- Herscher
- Hettick
- Heyworth
- Hickory
- Hills
- Hidalgo
- Highland
- Highland Park
- Highwood
- Hillsboro
- Hillsdale
- Hillside
- Hillview
- Hinckley
- Hindsboro
- Hines
- Hinsdale
- Hodgkins
- Hoffman
- Hoffman Estates
- Holcomb
- Homer
- Hometown
- Homewood
- Hoopeston
- Hooppole
- Hopedale
- Hopkins Park
- Hoyleton
- Hudson
- Huey
- Hull
- Humboldt
- Hume
- Huntley
- Huntsville
- Hurst
- Hutsonville
- Hyde Park
- Illinois City
- Illiopolis
- Ina
- Indian Head Park
- Indianola
- Industry
- Ingleside
- Ingraham
- Iola
- Ipava
- Iroquois
- Irving
- Irvington
- Island Lake
- Itasca
- Iuka
- Ivesdale
- Jacksonville
- Jacob
- Janesville
- Jerome
- Jerseyville
- Jewett
- Johnsburg
- Johnsonville
- Johnston City
- Joliet
- Jonesboro
- Joppa
- Joy
- Junction
- Justice
- Kampsville
- Kane
- Kaneville
- Kankakee
- Kansas
- Karbers Ridge
- Karnak
- Kasbeer
- Keenes
- Keensburg
- Keithsburg
- Kell
- Kempton
- Kenilworth
- Kenney
- Kent
- Kewanee
- Keyesport
- Kilbourne
- Kildeer
- Kincaid
- Kinderhook
- Kingston
- Kingston Mines
- Kinmundy
- Kinsman
- Kirkland
- Kirkwood
- Knoxville
- La Fayette
- La Fox
- La Moille
- La Place
- La Prairie
- La Rose
- La Salle
- Lacon
- Ladd
- LaGrange
- LaGrange Park
- LaHarpe
- Lake Bluff
- Lake Forest
- Lake Fork
- Lake in the Hills
- Lake Villa
- Lake Zurich
- Lakemoor
- Lakewood
- Lanark
- Lancaster
- Lane
- Lansing
- Latham
- Laura
- Lawndale
- Lawrenceville
- Le Roy
- Leaf River
- Lebanon
- Lee
- Lee Center
- Leland
- Lemont
- Lena
- Lenzburg
- Leonore
- Lerna
- Lewistown
- Lexington
- Liberty
- Libertyville
- Lima
- Lincoln
- Lincolnshire
- Lincolnwood
- Lindenhurst
- Lindenwood
- Lisle
- Litchfield
- Literberry
- Little York
- Littleton
- Liverpool
- Livingston
- Loami
- Lockport
- Loda
- Logan
- Lomax
- Lombard
- London Mills
- Long Grove
- Long Point
- Longview
- Loogootee
- Loraine
- Lostant
- Louisville
- Lovejoy
- Loves Park
- Lovington
- Lowder
- Lowpoint
- Ludlow
- Lyndon
- Lynn Center
- Lyons