RANKING · 2010 CENSUS · 23 SHOWN OF 23

Fastest shrinking, Wyoming counties · 2010

Wyoming counties with the steepest population decline from the 2000 census to 2010. 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

01Platte County, WYWY8,634-1.6%−9.7 pts

02Hot Springs County, WYWY4,600-1.4%−3.0 pts

03Carbon County, WYWY14,013+1.6%+7.7 pts

04Big Horn County, WYWY12,024+1.8%−7.1 pts

05Washakie County, WYWY7,597+2.9%+4.1 pts

06Niobrara County, WYWY2,341+3.2%+6.9 pts

07Goshen County, WYWY12,640+5.7%+4.3 pts

08Uinta County, WYWY20,728+7.0%+1.4 pts

09Weston County, WYWY6,840+8.5%+6.6 pts

10Park County, WYWY31,171+9.4%−1.9 pts

11Sheridan County, WYWY33,241+9.6%−3.1 pts

12Fremont County, WYWY39,464+12.1%+5.7 pts

13Laramie County, WYWY102,938+12.4%+0.8 pts

14Albany County, WYWY38,558+13.4%+9.4 pts

15Natrona County, WYWY80,526+13.4%+4.7 pts

16Converse County, WYWY13,824+14.8%+6.5 pts

17Sweetwater County, WYWY41,267+16.5%+19.6 pts

18Teton County, WYWY23,333+16.7%−46.7 pts

19Crook County, WYWY7,852+20.3%+9.1 pts

20Johnson County, WYWY8,908+21.1%+6.0 pts

21Lincoln County, WYWY21,180+24.2%+8.8 pts

22Campbell County, WYWY48,145+36.9%+22.2 pts

23Sublette County, WYWY8,929+73.1%+50.9 pts

SHOWING 1–23 OF 23

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS