11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lovell | 1 | 2,397 | 2,241 | 1.31% | 2,175 | 1 | Town |
| Greybull | 2 | 1,732 | 1,644 | 0.99% | 782 | 2 | Town |
| Basin | 3 | 1,350 | 1,285 | 0.97% | 571 | 2 | Town |
| Powder Horn | 4 | 1,263 | 953 | 7.22% | 659 | 2 | CDP |
| Cowley | 5 | 883 | 763 | 2.79% | 1,011 | 1 | Town |
| Byron | 6 | 582 | 556 | 0.87% | 642 | 1 | Town |
| Burlington | 7 | 394 | 316 | 3.96% | 390 | 1 | Town |
| Garland | 8 | 206 | 193 | 3% | 61 | 3 | CDP |
| Deaver | 9 | 175 | 153 | 2.34% | 173 | 1 | Town |
| Manderson | 10 | 89 | 87 | 0% | 104 | 1 | Town |
| Hyattville | 11 | 58 | 100 | 7.41% | 14 | 4 | CDP |
Lovell is the largest city in Big Horn County, with a population of 2,397.
Hyattville is the smallest city in Big Horn County, with a population of 58.
There are 11 cities in Big Horn County, Wyoming.