RANKING · 2025 ESTIMATES · 23 SHOWN OF 23

Most population lost, Wyoming counties

Wyoming counties that lost the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 23 counties in Wyoming that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Sweetwater County, WYWY41,267-1,005−17%

02Carbon County, WYWY14,013-524−49%

03Niobrara County, WYWY2,341-126+37%

04Washakie County, WYWY7,597-88−11%

05Hot Springs County, WYWY4,600-21−129%

06Teton County, WYWY23,333+2−100%

07Weston County, WYWY6,840+2−98%

08Platte County, WYWY8,634+29−96%

09Converse County, WYWY13,824+73−92%

10Goshen County, WYWY12,640+142−14%

11Sublette County, WYWY8,929+201−81%

12Fremont County, WYWY39,464+230−89%

13Uinta County, WYWY20,728+278−73%

14Johnson County, WYWY8,908+461−50%

15Big Horn County, WYWY12,024+503−46%

16Natrona County, WYWY80,526+571−89%

17Crook County, WYWY7,852+671+13%

18Campbell County, WYWY48,145+1,119−74%

19Albany County, WYWY38,558+1,492+23%

20Park County, WYWY31,171+1,547−41%

21Lincoln County, WYWY21,180+1,599−18%

22Sheridan County, WYWY33,241+2,320−23%

23Laramie County, WYWY102,938+2,426−71%

SHOWING 1–23 OF 23

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES