| County | Rank | Change (2020) ↓ | 2026 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Crook County | 1 | 13.29% | 8,133 | 7,179 |
| Albany County | 2 | 9.43% | 40,616 | 37,115 |
| Sheridan County | 3 | 8.92% | 33,772 | 31,005 |
| Lincoln County | 4 | 7.75% | 21,182 | 19,658 |
| Park County | 5 | 6.53% | 31,602 | 29,666 |
| Big Horn County | 6 | 5.67% | 12,130 | 11,479 |
| Johnson County | 7 | 4.2% | 8,825 | 8,469 |
| Campbell County | 8 | 3.54% | 48,816 | 47,146 |
| Laramie County | 9 | 2.44% | 103,191 | 100,733 |
| Sublette County | 10 | 1.98% | 8,913 | 8,740 |
| Weston County | 11 | 1.83% | 6,942 | 6,817 |
| Natrona County | 12 | 1.24% | 81,294 | 80,300 |
| Fremont County | 13 | 0.95% | 39,563 | 39,190 |
| Goshen County | 14 | 0.51% | 12,581 | 12,517 |
| Uinta County | 15 | -0.22% | 20,415 | 20,461 |
| Hot Springs County | 16 | -1.06% | 4,571 | 4,620 |
| Converse County | 17 | -1.11% | 13,598 | 13,750 |
| Teton County | 18 | -1.3% | 23,080 | 23,384 |
| Washakie County | 19 | -1.94% | 7,514 | 7,663 |
| Sweetwater County | 20 | -2.26% | 41,243 | 42,196 |
| Carbon County | 21 | -2.7% | 14,116 | 14,508 |
| Platte County | 22 | -2.99% | 8,374 | 8,632 |
| Niobrara County | 23 | -8.32% | 2,249 | 2,453 |
Wyoming's counties show varied growth patterns from 2020 to 2026. Crook County leads with 2.1% annualized growth, followed by Albany County (1.51%) and Sheridan County (1.43%). The largest counties are Laramie County (103,191), Natrona County (81,294), and Campbell County (48,816). Of the 23 counties in Wyoming, 14 are growing while 9 have experienced population decline. Overall, counties averaged 0.32% annualized growth, with total population growing by 0.43% annually.
-0.05
-0.025
0
0.025
0.05
0.075