| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cheyenne | 1 | 715 | 768 | -1.38% | 724 | 1 | Town |
| Hammon | 2 | 451 | 474 | -0.88% | 616 | 1 | Town |
| Reydon | 3 | 128 | 138 | -1.54% | 260 | 0 | Town |
| Sweetwater | 4 | 105 | 103 | 0% | 7.0 | 16 | Town |
| Strong City | 5 | 31 | 32 | 0% | 62 | 0 | Town |
Cheyenne is the largest city in Roger Mills County, with a population of 715.
Strong City is the smallest city in Roger Mills County, with a population of 31.
There are 5 cities in Roger Mills County, Oklahoma.