Fastest Growing Counties in Wyoming (2025)

County
Rank
Change (2020)
2025 Pop.
2020 Pop.
Crook County110.59%7,9387,178
Lincoln County28.34%21,29819,658
Sheridan County38.02%33,48731,000
Sublette County47.64%9,4038,736
Big Horn County57.07%12,29611,484
Park County65.14%31,19529,669
Johnson County74.39%8,8398,467
Albany County83.51%38,41537,112
Fremont County92.83%40,31339,202
Campbell County102.61%48,37647,147
Hot Springs County112.51%4,7374,621
Uinta County121.58%20,78120,457
Goshen County131.11%12,65412,515
Converse County141.1%13,89713,746
Laramie County150.66%101,390100,730
Natrona County160.6%80,77780,299
Washakie County170.33%7,6827,657
Teton County18-1.18%23,10223,379
Weston County19-1.58%6,7086,816
Sweetwater County20-2.84%40,99942,197
Platte County21-3.44%8,3348,631
Niobrara County22-3.59%2,3662,454
Carbon County23-4.02%13,92614,509

Wyoming County Growth Overview

Wyoming's counties show varied growth patterns from 2020 to 2025. Crook County leads with 10.59% annualized growth, followed by Lincoln County (8.34%) and Sheridan County (8.02%). The largest counties are Laramie County (101,390), Natrona County (80,777), and Campbell County (48,376). Of the 23 counties in Wyoming, 17 are growing while 6 have experienced population decline. Overall, counties averaged 2.23% annualized growth, with total population growing by 1.95% annually.