6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wolf Point | 1 | 2,437 | 2,636 | -1.62% | 2,760 | 0.88 | City |
| Poplar | 2 | 703 | 762 | -1.68% | 2,529 | 0.28 | City |
| Culbertson | 3 | 696 | 751 | -1.56% | 680 | 1.02 | Town |
| Brockton | 4 | 574 | 341 | 7.09% | 580 | 0.99 | CDP |
| Bainville | 5 | 256 | 273 | -1.16% | 203 | 1.26 | Town |
| Froid | 6 | 180 | 195 | -1.64% | 288 | 0.62 | Town |
Wolf Point is the largest city in Roosevelt County, with a population of 2,437.
Froid is the smallest city in Roosevelt County.
There are 6 cities in Roosevelt County, Montana.