| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wolf Point | 1 | 2,494 | 2,672 | -1.46% | 2,824 | 1 | City |
| Poplar | 2 | 710 | 764 | -1.66% | 2,554 | 0 | City |
| Culbertson | 3 | 704 | 752 | -1.54% | 613 | 1 | Town |
| Bainville | 4 | 262 | 279 | -1.5% | 207 | 1 | Town |
| Froid | 5 | 181 | 194 | -1.63% | 290 | 1 | Town |
Wolf Point is the largest city in Roosevelt County, with a population of 2,494.
Froid is the smallest city in Roosevelt County, with a population of 181.
There are 5 cities in Roosevelt County, Montana.