- Ingram
- Iola
- Ironton
- Indian Heights
- Island Number Ninety-one
- Isle La Plume
- Ipswich
- Iron Ridge
- Ixonia
- Ingersoll
- Island Number Seventy-one
- Ile Le Grand
- Isaar
- Indian Creek
- Ives
- Ives Grove
- Ithaca
- Indianford
- Imalone
- Island Lake
- Idlewood Beach
- Indian Meadows
- Interwald
- Iduna
- Island Number One Hundred Forty-six
- Island Number One Hundred Forty-three
- Island One Hundred Twenty
- Island Number One
- Indian Shores
- Island Beach