6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wolf Point | 1 | 2,485 | 2,670 | -1.47% | 2,814 | 1 | City |
| Poplar | 2 | 711 | 765 | -1.52% | 2,558 | 0 | City |
| Culbertson | 3 | 695 | 748 | -1.56% | 679 | 1 | Town |
| Brockton | 4 | 574 | 341 | 7.09% | 580 | 1 | CDP |
| Bainville | 5 | 257 | 275 | -1.53% | 203 | 1 | Town |
| Froid | 6 | 182 | 195 | -1.62% | 292 | 1 | Town |
Wolf Point is the largest city in Roosevelt County, with a population of 2,485.
Froid is the smallest city in Roosevelt County, with a population of 182.
There are 6 cities in Roosevelt County, Montana.