Data / Rankings / Population / Counties in Wyoming

Counties in Wyoming by population

Laramie County had the highest population of 23 counties in 2020, at 100,727. Niobrara County had the lowest, at 2,451. The median was 14,508 and the figure for Wyoming was 577,669. Source: the U.S. Census Bureau.

Highest100,727Laramie County
Lowest2,451Niobrara County
Median14,50823 counties
Wyoming577,669History

All counties, 2020

CSVChart (SVG)

Laramie CountyLaramie County: 100,727 persons100,727Natrona CountyNatrona County: 80,299 persons80,299Campbell CountyCampbell County: 47,146 persons47,146Sweetwater CountySweetwater County: 42,194 persons42,194Fremont CountyFremont County: 39,192 persons39,192Albany CountyAlbany County: 37,107 persons37,107Sheridan CountySheridan County: 31,006 persons31,006Park CountyPark County: 29,670 persons29,670Teton CountyTeton County: 23,381 persons23,381Uinta CountyUinta County: 20,462 persons20,462Lincoln CountyLincoln County: 19,654 persons19,654Carbon CountyCarbon County: 14,508 persons14,508Converse CountyConverse County: 13,748 persons13,748Goshen CountyGoshen County: 12,520 persons12,520Big Horn CountyBig Horn County: 11,480 persons11,480Sublette CountySublette County: 8,740 persons8,740Platte CountyPlatte County: 8,632 persons8,632Johnson CountyJohnson County: 8,469 persons8,469Washakie CountyWashakie County: 7,659 persons7,659Crook CountyCrook County: 7,183 persons7,183Weston CountyWeston County: 6,820 persons6,820Hot Springs CountyHot Springs County: 4,621 persons4,621Niobrara CountyNiobrara County: 2,451 persons2,451
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2020
persons
1Laramie County100,727
2Natrona County80,299
3Campbell County47,146
4Sweetwater County42,194
5Fremont County39,192
6Albany County37,107
7Sheridan County31,006
8Park County29,670
9Teton County23,381
10Uinta County20,462
11Lincoln County19,654
12Carbon County14,508
13Converse County13,748
14Goshen County12,520
15Big Horn County11,480
16Sublette County8,740
17Platte County8,632
18Johnson County8,469
19Washakie County7,659
20Crook County7,183
21Weston County6,820
22Hot Springs County4,621
23Niobrara County2,451

Other periods

About this ranking

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Questions

Which county has the highest population?

Laramie County, with 100,727 in 2020, according to the U.S. Census Bureau.

Which county has the lowest population?

Niobrara County, with 2,451 in 2020.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.

Population: other rankings

Counties in Wyoming: more rankings