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%−37.1 pts

02Washakie County, WYWY7,597-9.9%−8.8 pts

03Carbon County, WYWY14,013-8.5%−2.4 pts

04Goshen County, WYWY12,640-5.7%−7.0 pts

05Weston County, WYWY6,840-5.1%−7.1 pts

06Hot Springs County, WYWY4,600-4.0%−5.5 pts

07Sweetwater County, WYWY41,267-3.5%−0.4 pts

08Uinta County, WYWY20,728-3.2%−8.7 pts

09Fremont County, WYWY39,464-2.2%−8.6 pts

10Johnson County, WYWY8,908-1.4%−16.6 pts

11Big Horn County, WYWY12,024-1.3%−10.2 pts

12Platte County, WYWY8,634-0.7%−8.8 pts

13Niobrara County, WYWY2,341-0.7%+3.0 pts

14Converse County, WYWY13,824-0.6%−8.9 pts

15Crook County, WYWY7,852+1.4%−9.8 pts

16Campbell County, WYWY48,145+1.9%−12.8 pts

17Albany County, WYWY38,558+2.1%−1.8 pts

18Park County, WYWY31,171+5.0%−6.2 pts

19Natrona County, WYWY80,526+6.0%−2.7 pts

20Sheridan County, WYWY33,241+6.2%−6.5 pts

21Lincoln County, WYWY21,180+8.1%−7.3 pts

22Laramie County, WYWY102,938+9.6%−2.0 pts

23Teton County, WYWY23,333+9.6%−53.8 pts

SHOWING 1–23 OF 23

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