8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lovell | 1 | 2,428 | 2,241 | 1.29% | 2,203 | 1 | Town |
| Greybull | 2 | 1,750 | 1,644 | 1.04% | 790 | 2 | Town |
| Basin | 3 | 1,363 | 1,285 | 0.96% | 577 | 2 | Town |
| Cowley | 4 | 907 | 763 | 2.72% | 1,039 | 1 | Town |
| Byron | 5 | 587 | 556 | 0.86% | 648 | 1 | Town |
| Burlington | 6 | 410 | 316 | 4.06% | 406 | 1 | Town |
| Deaver | 7 | 180 | 153 | 2.86% | 178 | 1 | Town |
| Manderson | 8 | 90 | 87 | 1.12% | 106 | 1 | Town |
Lovell is the largest city in Big Horn County, with a population of 2,428.
Manderson is the smallest city in Big Horn County, with a population of 90.
There are 8 cities in Big Horn County, Wyoming.