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