| City | Rank | County | 2026 Pop. ↓ |
|---|---|---|---|
| Gillette | 1 | Campbell County | 34,144 |
| Sheridan | 2 | Sheridan County | 20,267 |
| Buffalo | 3 | Johnson County | 4,794 |
| Newcastle | 4 | Weston County | 3,349 |
| Sleepy Hollow | 5 | Campbell County | 1,928 |
| Wright | 6 | Campbell County | 1,661 |
| Story | 7 | Sheridan County | 1,254 |
| Ranchester | 8 | Sheridan County | 1,196 |
| Sundance | 9 | Crook County | 1,165 |
| Moorcroft | 10 | Crook County | 1,041 |
| Upton | 11 | Weston County | 899 |
| Dayton | 12 | Sheridan County | 828 |
| Pine Haven | 13 | Crook County | 596 |
| Parkman | 14 | Sheridan County | 453 |
| Hulett | 15 | Crook County | 356 |
| Kaycee | 16 | Johnson County | 293 |
| Clearmont | 17 | Sheridan County | 125 |
| Osage | 18 | Weston County | 64 |
| Arvada | 19 | Sheridan County | 11 |
Campbell County, Sheridan County, Johnson County, Crook County, and Weston County are the counties generally considered part of Northeast Wyoming.