| City | County | 2026 Pop. ↓ |
|---|---|---|
| Tea | Lincoln County | 8,520 |
| Tyndall | Bon Homme County | 1,127 |
| Tripp | Hutchinson County | 561 |
| Timber Lake | Dewey County | 556 |
| Two Strike | Todd County | 442 |
| Tabor | Bon Homme County | 413 |
| Trent | Moody County | 250 |
| Tulare | Spink County | 204 |
| Toronto | Deuel County | 197 |
| Tschetter Colony | Hutchinson County | 118 |
| Turton | Spink County | 53 |
| Twin Brooks | Grant County | 47 |
| Tolstoy | Potter County | 37 |