- Trenton
- Trevino
- Trevor
- Trimbelle
- Tripoli
- Trippville
- Troy
- Troy Center
- Truax
- Truesdell
- Truman
- Trumbull Island
- Tuleta Hills
- Tunnel City
- Tunnelville
- Turtle Island
- Turtle Lake
- Turtleville
- Tuscobia
- Tustin
- Twelve Corners
- Twin Bluffs
- Twin Grove
- Twin Island
- Twin Islands
- Twin Islands
- Twin Lakes
- Twin Lakes Mobile Home Park
- Twin Town
- Two Creeks