- Tabor
- Toronto
- Tulare
- Trent
- Tacoma Park
- Terraville
- Terry
- Teton
- Thatcher
- Thomas
- Three Sisters Islands (historical)
- Thunder Butte
- Thunder Hawk
- Thunderbird Colony
- Thunderbird Homes Addition
- Tigerville
- Tilford
- Tinton
- Tomahawk
- Torvik Subdivision
- Towhead Island (historical)
- Trail City
- Trojan
- Troy
- Tschetter Colony
- Tunerville
- Turkey Ridge
- Tuthill
- Twilight Hills Addition
- Tea