| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Takiwā o Columbia | city | District of Columbia | United States | 38.90 | -77.04 | 9 | |
| Tenleytown | city | District of Columbia | United States | 38.95 | -77.09 | 380 | |
| Terra Cotta | city | District of Columbia | United States | 38.95 | -77.00 | 141 | |
| The Cloisters | city | District of Columbia | United States | 38.93 | -77.01 | 147 | |
| The Palisades | city | District of Columbia | United States | 38.93 | -77.10 | 127 | |
| Thomas Circle | city | District of Columbia | United States | 38.91 | -77.03 | 49 | |
| Tohoga (historical) | city | District of Columbia | United States | 38.90 | -77.06 | 26 | |
| Trinidad | city | District of Columbia | United States | 38.91 | -76.98 | 91 | |
| Truxton Circle | city | District of Columbia | United States | 38.91 | -77.01 | 49 | |
| Tunlaw Heights (historical) | city | District of Columbia | United States | 38.93 | -77.08 | 328 | |
| Twining | city | District of Columbia | United States | 38.87 | -76.97 | 137 |