Cities in State of Illinois, United States ( 474 )
- Galesburg, Illinois
- Galva, Illinois
- Geneseo, Illinois
- Geneva, Illinois
- Genoa, Illinois
- Georgetown, Illinois
- Georgetown, Illinois
- Germantown Hills
- Gibson City
- Gilberts
- Gillespie, Illinois
- Glen Carbon
- Glen Ellyn
- Glencoe, Illinois
- Glendale Heights
- Glenview, Illinois
- Glenwood, Illinois
- Godfrey, Illinois
- Goodings Grove
- Grandwood Park
- Granite City
- Grayslake
- Green Oaks, Illinois
- Green Rock
- Greenville, Illinois
- Gurnee
- Hainesville, Illinois
- Hamilton, Illinois
- Hampshire, Illinois
- Hanover Park, Illinois
- Harrisburg, Illinois
- Harvard
- Harvey, Illinois
- Harwood Heights
- Havana, Illinois
- Hawthorn Woods