6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cheyenne | 1 | 709 | 766 | -1.53% | 718 | 0.99 | Town |
| Hammon | 2 | 448 | 475 | -1.1% | 612 | 0.73 | Town |
| Reydon | 3 | 130 | 140 | -1.52% | 264 | 0.49 | Town |
| Sweetwater | 4 | 101 | 103 | 0% | 6 | 15.86 | Town |
| Durham | 5 | 46 | 9 | 6.98% | 202 | 0.23 | CDP |
| Strong City | 6 | 29 | 31 | 0% | 58 | 0.50 | Town |
Cheyenne is the largest city in Roger Mills County, with a population of 709.
Strong City is the smallest city in Roger Mills County.
There are 6 cities in Roger Mills County, Oklahoma.