| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sheridan | 1 | 20,267 | 18,786 | 1.26% | 1,559 | 13 | City |
| Ranchester | 2 | 1,196 | 1,072 | 2.22% | 1,687 | 1 | Town |
| Dayton | 3 | 828 | 816 | 0.36% | 1,511 | 1 | Town |
| Clearmont | 4 | 125 | 116 | 1.63% | 749 | 0 | Town |
Sheridan is the largest city in Sheridan County, with a population of 20,267.
Clearmont is the smallest city in Sheridan County, with a population of 125.
There are 4 cities in Sheridan County, Wyoming.