| Theresa Town, WI (Town) |
| Theresa Village, WI (Village) |
| Thermopolis, WY (Town) |
| Thetford, VT (Town) |
| Thetford Township, MI (Township) |
| Thibodaux, LA (City) |
| Thief Lake, MN (Township) |
| Thief River Falls, MN (City) |
| Thiensville Village, WI (Village) |
| Thingvalla, ND (Township) |
| Third Lake, IL (Village) |
| Third River, MN (Township) |
| Thomas, OK (City) |
| Thomas, WV (Town) |
| Thomas, KS (Township) |
