| City | Rank | Annual Change ↓ | 2026 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Alpine | 1 | 2.32% | 1,414 | 1,229 |
| Ranchester | 2 | 2.22% | 1,196 | 1,072 |
| Sundance | 3 | 2.1% | 1,165 | 1,032 |
| Star Valley Ranch | 4 | 1.98% | 2,115 | 1,874 |
| Mills | 5 | 1.86% | 4,720 | 4,227 |
| Buffalo | 6 | 1.29% | 4,794 | 4,442 |
| Sheridan | 7 | 1.26% | 20,267 | 18,786 |
| Afton | 8 | 1.2% | 2,283 | 2,171 |
| Lovell | 9 | 1.19% | 2,379 | 2,238 |
| Saratoga | 10 | 0.91% | 1,782 | 1,692 |
| Greybull | 11 | 0.88% | 1,715 | 1,643 |
| Basin | 12 | 0.82% | 1,345 | 1,283 |
| Laramie | 13 | 0.7% | 32,511 | 31,421 |
| Powell | 14 | 0.64% | 6,616 | 6,427 |
| Cody | 15 | 0.63% | 10,442 | 10,123 |
| Riverton | 16 | 0.62% | 10,978 | 10,687 |
| Lyman | 17 | 0.59% | 2,229 | 2,140 |
| Evansville | 18 | 0.49% | 2,889 | 2,783 |
| Gillette | 19 | 0.35% | 34,144 | 33,495 |
| Torrington | 20 | 0.29% | 6,223 | 6,137 |
| Douglas | 21 | 0.23% | 6,484 | 6,390 |
| Bar Nunn | 22 | 0.17% | 3,017 | 2,998 |
| Wright | 23 | 0.12% | 1,661 | 1,648 |
| Cheyenne | 24 | 0.11% | 66,580 | 65,478 |
| Lander | 25 | 0.08% | 7,385 | 7,399 |
| Newcastle | 26 | 0% | 3,349 | 3,361 |
| Thermopolis | 27 | -0.07% | 2,719 | 2,734 |
| Glenrock | 28 | -0.08% | 2,416 | 2,420 |
| Worland | 29 | -0.08% | 4,726 | 4,772 |
| Pinedale | 30 | -0.1% | 1,995 | 2,016 |
| Jackson | 31 | -0.16% | 10,703 | 10,804 |
| Evanston | 32 | -0.16% | 11,686 | 11,778 |
| Mountain View | 33 | -0.24% | 1,261 | 1,278 |
| Casper | 34 | -0.25% | 58,624 | 59,316 |
| Kemmerer | 35 | -0.42% | 2,343 | 2,416 |
| Rock Springs | 36 | -0.52% | 22,817 | 23,490 |
| Guernsey | 37 | -0.63% | 1,097 | 1,129 |
| Wheatland | 38 | -0.68% | 3,492 | 3,594 |
| Green River | 39 | -0.7% | 11,370 | 11,815 |
| Pine Bluffs | 40 | -1.17% | 1,098 | 1,161 |
| Rawlins | 41 | -1.39% | 7,637 | 8,245 |
| Lusk | 42 | -2.11% | 1,391 | 1,527 |
Wyoming's cities with over 1,000 residents show varied growth patterns from 2020 to 2025. Alpine leads with 2.32% annualized growth, followed by Ranchester (2.22%) and Sundance (2.1%). The largest population centers are Cheyenne (66,580), Casper (58,624), and Gillette (34,144). Of the 42 cities over 1,000 population, 26 are growing while 16 experienced population decline. Overall, cities averaged 0.34% annualized growth, with total urban population growing by 1.15% annually.