RANKING · 2020 CENSUS · 23 SHOWN OF 23

Most population lost, Wyoming counties · 2020

Wyoming counties that lost the most residents from the 2010 census to 2020, 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

01Sweetwater County, WYWY41,267-1,534+27%

02Sublette County, WYWY8,929-1,519−241%

03Carbon County, WYWY14,013-1,348+32%

04Fremont County, WYWY39,464-889−142%

05Washakie County, WYWY7,597-848+757%

06Goshen County, WYWY12,640-751−555%

07Uinta County, WYWY20,728-668−164%

08Weston County, WYWY6,840-370−394%

09Hot Springs County, WYWY4,600-191−362%

10Big Horn County, WYWY12,024-147−116%

11Johnson County, WYWY8,908-122−113%

12Converse County, WYWY13,824-82−109%

13Platte County, WYWY8,634-62−109%

14Niobrara County, WYWY2,341-17−82%

15Crook County, WYWY7,852+98−83%

16Albany County, WYWY38,558+767−37%

17Campbell County, WYWY48,145+893−79%

18Park County, WYWY31,171+1,419−46%

19Lincoln County, WYWY21,180+1,475−24%

20Sheridan County, WYWY33,241+1,805−40%

21Teton County, WYWY23,333+2,037−71%

22Natrona County, WYWY80,526+4,505−15%

23Laramie County, WYWY102,938+8,774+4%

SHOWING 1–23 OF 23

Download CSV (full list, 23 rows)

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