| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Winner | 1 | 2,987 | 2,903 | 0.61% | 1,303 | 2 | City |
| Colome | 2 | 339 | 329 | 0.59% | 1,202 | 0 | City |
| New Witten | 3 | 55 | 54 | 0% | 199 | 0 | Town |
Winner is the largest city in Tripp County, with a population of 2,987.
New Witten is the smallest city in Tripp County, with a population of 55.
There are 3 cities in Tripp County, South Dakota.