13 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Tea | Lincoln County | 8,709 |
| Tyndall | Bon Homme County | 1,096 |
| Tripp | Hutchinson County | 559 |
| Timber Lake | Dewey County | 549 |
| Two Strike | Todd County | 442 |
| Tabor | Bon Homme County | 398 |
| Trent | Moody County | 252 |
| Tulare | Spink County | 200 |
| Toronto | Deuel County | 193 |
| Tschetter Colony | Hutchinson County | 118 |
| Turton | Spink County | 51 |
| Twin Brooks | Grant County | 47 |
| Tolstoy | Potter County | 36 |