- Independence
- Ingram
- Iola
- Ironton
- Iron Ridge
- Ixonia
- Island Number Seventy-one
- Idlewild
- Idlewood Beach
- Iduna
- Ile Le Grand
- Imalone
- Indernuhle Island
- Indian Creek
- Indian Heights
- Indian Heights
- Indian Hills
- Indian Meadows
- Indian Shores
- Indianford
- Ingersoll
- Ingle
- Inlet
- Ino
- Institute
- Interwald
- Ipswich
- Irma
- Iron Belt
- Iron River