RANKING · 2020 CENSUS · 23 SHOWN OF 23

Largest by population, Wyoming counties · 2020

The most populous Wyoming counties as of the 2020 population estimates. This list covers the 23 counties in Wyoming that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01Laramie County, WYWY100,512+23%

02Natrona County, WYWY79,955+20%

03Campbell County, WYWY47,026+40%

04Sweetwater County, WYWY42,272+12%

05Fremont County, WYWY39,234+10%

06Albany County, WYWY37,066+16%

07Sheridan County, WYWY30,921+16%

08Park County, WYWY29,624+15%

09Teton County, WYWY23,331+28%

10Uinta County, WYWY20,450+4%

11Lincoln County, WYWY19,581+34%

12Carbon County, WYWY14,537−7%

13Converse County, WYWY13,751+14%

14Goshen County, WYWY12,498−0%

15Big Horn County, WYWY11,521+1%

16Sublette County, WYWY8,728+47%

17Platte County, WYWY8,605−2%

18Johnson County, WYWY8,447+19%

19Washakie County, WYWY7,685−7%

20Crook County, WYWY7,181+22%

21Weston County, WYWY6,838+3%

22Hot Springs County, WYWY4,621−5%

23Niobrara County, WYWY2,467+2%

SHOWING 1–23 OF 23

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