RANKING · 2025 ESTIMATES · 23 SHOWN OF 23

Fastest shrinking, Wyoming counties

Wyoming counties with the steepest population decline from the 2020 census to 2025. This list covers the 23 counties in Wyoming that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Niobrara County, WYWY2,341-5.1%−1.4 pts

02Carbon County, WYWY14,013-3.6%+2.5 pts

03Sweetwater County, WYWY41,267-2.4%+0.7 pts

04Washakie County, WYWY7,597-1.1%+0.0 pts

05Hot Springs County, WYWY4,600-0.5%−2.0 pts

06Teton County, WYWY23,333+0.0%−63.4 pts

07Weston County, WYWY6,840+0.0%−1.9 pts

08Platte County, WYWY8,634+0.3%−7.8 pts

09Converse County, WYWY13,824+0.5%−7.8 pts

10Fremont County, WYWY39,464+0.6%−5.8 pts

11Natrona County, WYWY80,526+0.7%−8.0 pts

12Goshen County, WYWY12,640+1.1%−0.2 pts

13Uinta County, WYWY20,728+1.4%−4.2 pts

14Sublette County, WYWY8,929+2.3%−19.9 pts

15Campbell County, WYWY48,145+2.4%−12.4 pts

16Laramie County, WYWY102,938+2.4%−9.2 pts

17Albany County, WYWY38,558+4.0%+0.1 pts

18Big Horn County, WYWY12,024+4.4%−4.5 pts

19Park County, WYWY31,171+5.2%−6.0 pts

20Johnson County, WYWY8,908+5.5%−9.7 pts

21Sheridan County, WYWY33,241+7.5%−5.2 pts

22Lincoln County, WYWY21,180+8.2%−7.3 pts

23Crook County, WYWY7,852+9.3%−1.9 pts

SHOWING 1–23 OF 23

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU POPULATION ESTIMATES