RANKING · 2020 CENSUS · 23 SHOWN OF 23

Fastest shrinking, Wyoming counties · 2020

Wyoming counties with the steepest population decline from the 2010 census to 2020. 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

01Sublette County, WYWY8,929-14.8%−167%

02Washakie County, WYWY7,597-9.9%+742%

03Carbon County, WYWY14,013-8.5%+39%

04Goshen County, WYWY12,640-5.7%−525%

05Weston County, WYWY6,840-5.1%−366%

06Hot Springs County, WYWY4,600-4.0%−361%

07Sweetwater County, WYWY41,267-3.5%+12%

08Uinta County, WYWY20,728-3.2%−157%

09Fremont County, WYWY39,464-2.2%−135%

10Johnson County, WYWY8,908-1.4%−109%

11Big Horn County, WYWY12,024-1.3%−114%

12Platte County, WYWY8,634-0.7%−109%

13Niobrara County, WYWY2,341-0.7%−81%

14Converse County, WYWY13,824-0.6%−107%

15Crook County, WYWY7,852+1.4%−88%

16Campbell County, WYWY48,145+1.9%−87%

17Albany County, WYWY38,558+2.1%−47%

18Park County, WYWY31,171+5.0%−55%

19Natrona County, WYWY80,526+6.0%−31%

20Sheridan County, WYWY33,241+6.2%−51%

21Lincoln County, WYWY21,180+8.1%−47%

22Laramie County, WYWY102,938+9.6%−17%

23Teton County, WYWY23,333+9.6%−85%

SHOWING 1–23 OF 23

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS