- Ironwood Island
- Ino
- Island Number Fifty-three
- Island Number Sixty-three
- Irvine
- Ingle
- Island Number One Hundred Fifty-nine
- Island Number One Hundred Fifty-One (historical)
- Island Number One Hundred Fifty-Six
- Island Number One Hundred Seventy
- Island Number One Hundred Seventy-two
- Island Number One Hundred Sixty-seven
- Island Number One Hundred Sixty-six
- Indian Heights
- Indernuhle Island
- Idlewild
- Itasca
- Irvington
- Island Number One Hundred Eighty-one
- Island Number One Hundred Ninety-two
- Island Number One Hundred Seventy-seven
- Island Number Two Hundred Eleven
- Island Number Two Hundred Five
- Island Number Two Hundred Nine
- Island Number Two Hundred One
- Island Number Two Hundred Seven
- Island Number Two Hundred Twelve
- Indian Hills
- Irving
- Independence