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. The median across all 23 is +1.1%. Biggest climber in the top 100 since 2020: Teton County, WY, up 17 places to #6.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01▲12Niobrara County, WYWY2,341-5.1%−1.4 pts

02▲1Carbon County, WYWY14,013-3.6%+2.5 pts

03▲4Sweetwater County, WYWY41,267-2.4%+0.7 pts

04▼2Washakie County, WYWY7,597-1.1%0.0 pts

05▲1Hot Springs County, WYWY4,600-0.5%−2.0 pts

06▲17Teton County, WYWY23,333+0.0%−63.4 pts

07▼2Weston County, WYWY6,840+0.0%−1.9 pts

08▲4Platte County, WYWY8,634+0.3%−7.8 pts

09▲5Converse County, WYWY13,824+0.5%−7.8 pts

10▼1Fremont County, WYWY39,464+0.6%−5.8 pts

11▲8Natrona County, WYWY80,526+0.7%−8.0 pts

12▼8Goshen County, WYWY12,640+1.1%−0.2 pts

13▼5Uinta County, WYWY20,728+1.4%−4.2 pts

14▼13Sublette County, WYWY8,929+2.3%−19.9 pts

15▲1Campbell County, WYWY48,145+2.4%−12.4 pts

16▲6Laramie County, WYWY102,938+2.4%−9.2 pts

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

18▼7Big Horn County, WYWY12,024+4.4%−4.5 pts

19▼1Park County, WYWY31,171+5.2%−6.0 pts

20▼10Johnson County, WYWY8,908+5.5%−9.7 pts

21▼1Sheridan County, WYWY33,241+7.5%−5.2 pts

22▼1Lincoln County, WYWY21,180+8.2%−7.3 pts

23▼8Crook County, WYWY7,852+9.3%−1.9 pts

SHOWING 1–23 OF 23

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES