RANKING · 2010 CENSUS · 23 SHOWN OF 23

Most population lost, Wyoming counties · 2010

Wyoming counties that lost the most residents from the 2000 census to 2010, by raw count of people rather than percentage. This list covers the 23 counties in Wyoming that qualify, ranked against each other statewide.

Flip the list · Most population gained, US counties →

WyomingAll states All rankings

SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Platte County, WYWY8,634-140−121%

02Hot Springs County, WYWY4,600-70−196%

03Niobrara County, WYWY2,341+77−184%

04Big Horn County, WYWY12,024+207−78%

05Washakie County, WYWY7,597+244−346%

06Carbon County, WYWY14,013+246−124%

07Weston County, WYWY6,840+564+348%

08Goshen County, WYWY12,640+711+331%

09Crook County, WYWY7,852+1,196+102%

10Uinta County, WYWY20,728+1,376+33%

11Johnson County, WYWY8,908+1,494+61%

12Converse County, WYWY13,824+1,781+93%

13Park County, WYWY31,171+2,419−7%

14Sheridan County, WYWY33,241+2,556−15%

15Teton County, WYWY23,333+3,043−57%

16Lincoln County, WYWY21,180+3,533+81%

17Albany County, WYWY38,558+4,285+252%

18Fremont County, WYWY39,464+4,319+102%

19Sublette County, WYWY8,929+4,327+302%

20Sweetwater County, WYWY41,267+6,193−612%

21Natrona County, WYWY80,526+8,917+68%

22Laramie County, WYWY102,938+10,131+20%

23Campbell County, WYWY48,145+12,435+187%

SHOWING 1–23 OF 23

Download CSV (full list, 23 rows)

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