- Gilchrist
- Gilead
- Gillespie
- Gilletts
- Gilligans Island
- Gillum
- Gilman
- Gilmer
- Gilmore
- Gilmore
- Gilson
- Ginger Hill
- Gingle Corners
- Girard
- Gladstone
- Glasford
- Glasgow
- Glen Avon
- Glen Carbon
- Glen Carbon Crossing
- Glen Ellyn
- Glen Oak
- Glenarm
- Glenbard South
- Glenbrook Acres West
- Glenbrook Countryside
- Glenburn
- Glencoe
- Glendale
- Glendale Heights