RANKING · 1990 CENSUS · 23 SHOWN OF 23

Largest by population, Wyoming counties · 1990

The most populous us counties as of the 2023 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 densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPTOTAL POPULATIONVS 2000

01Laramie County, WYWY102,93873,142−10%

02Natrona County, WYWY80,52661,226−8%

03Sweetwater County, WYWY41,26738,823+3%

04Fremont County, WYWY39,46433,662−6%

05Albany County, WYWY38,55830,797−4%

06Campbell County, WYWY48,14529,370−13%

07Sheridan County, WYWY33,24123,562−11%

08Park County, WYWY31,17123,178−10%

09Uinta County, WYWY20,72818,705−5%

10Carbon County, WYWY14,01316,659+7%

11Lincoln County, WYWY21,18012,625−13%

12Goshen County, WYWY12,64012,373−1%

13Teton County, WYWY23,33311,172−39%

14Converse County, WYWY13,82411,128−8%

15Big Horn County, WYWY12,02410,525−8%

16Washakie County, WYWY7,5978,388+1%

17Platte County, WYWY8,6348,145−8%

18Weston County, WYWY6,8406,518−2%

19Johnson County, WYWY8,9086,145−13%

20Crook County, WYWY7,8525,294−10%

21Sublette County, WYWY8,9294,843−18%

22Hot Springs County, WYWY4,6004,809−1%

23Niobrara County, WYWY2,3412,499+4%

SHOWING 1–23 OF 23

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES