| Trinity, AL (Town) |
| Trinity County, TX (County) |
| Trinity County, CA (County) |
| Trion, GA (City) |
| Triple Creek Community Development District, FL (CDD) |
| Triplett, MO (City) |
| Triplett, MO (Township) |
| Tripoli, IA (City) |
| Tripp, WI (Town) |
| Tripp, SD (City) |
| Tripp County, SD (County) |
| Triumph, PA (Township) |
| Triumph, ND (Township) |
| Triumph, NE (Township) |
| Trivoli, KS (Township) |
