- Indianola
- Industry
- Inverness
- Iola
- Irvington
- Irwin
- Ina
- Iroquois
- Irving
- Iuka
- Ideal
- Idlewild
- Idlewood
- Idylside
- Iles
- Illiana
- Illiana Heights
- Illinois City
- Imbs
- Independence
- Indian Boundary
- Indian Chase Meadows
- Indian Creek
- Indian Hill
- Indian Island
- Indian Island
- Indian Island
- Indian Oaks
- Indian Oaks
- Indian Ridge