6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cheyenne | 1 | 728 | 768 | -1.09% | 737 | 1 | Town |
| Hammon | 2 | 460 | 475 | -0.65% | 628 | 1 | Town |
| Reydon | 3 | 130 | 139 | -1.52% | 264 | 0 | Town |
| Sweetwater | 4 | 102 | 102 | 0% | 6 | 16 | Town |
| Durham | 5 | 46 | 9 | 6.98% | 202 | 0 | CDP |
| Strong City | 6 | 29 | 29 | 0% | 58 | 0 | Town |
Cheyenne is the largest city in Roger Mills County, with a population of 728.
Strong City is the smallest city in Roger Mills County, with a population of 29.
There are 6 cities in Roger Mills County, Oklahoma.