3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Boise City | 1 | 1,055 | 1,163 | -2.04% | 715 | 1 | City |
| Keyes | 2 | 249 | 273 | -1.97% | 690 | 0 | Town |
| Felt | 3 | 98 | 105 | 7.69% | 186 | 1 | CDP |
Boise City is the largest city in Cimarron County, with a population of 1,055.
Felt is the smallest city in Cimarron County, with a population of 98.
There are 3 cities in Cimarron County, Oklahoma.