13 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Tea | Lincoln County | 8,515 |
| Tyndall | Bon Homme County | 1,090 |
| Tripp | Hutchinson County | 559 |
| Timber Lake | Dewey County | 518 |
| Tabor | Bon Homme County | 402 |
| Two Strike | Todd County | 356 |
| Trent | Moody County | 253 |
| Tulare | Spink County | 202 |
| Toronto | Deuel County | 195 |
| Tschetter Colony | Hutchinson County | 71 |
| Turton | Spink County | 53 |
| Twin Brooks | Grant County | 44 |
| Tolstoy | Potter County | 36 |