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List of Cities and Counties in Wyoming
Discover Wyoming population facts easily with our list of counties and cities. Find out how many people live in each area, from big cities to small towns, and see how Wyoming’s population is spread out across the state.
Wyoming Counties by Population
A county is an administrative subdivision of a US state or territory. As of 2022, Wyoming is divided into 23 counties.
The average population of Wyoming counties is 25,165; Laramie County is the most populous (100,863) and Niobrara County is the least (2,438). The average land area is 4,222 sq mi. The largest county by area is Sweetwater County (10,426 sq mi) and the smallest is Hot Springs County (2,004 sq mi).
read about the Population of Wyoming
| # | County | Population 2020 | Area (sq. mi.) | Density (people/sq. mi.) |
| 1 | Laramie County | 100,863 | 2,686 | 37.55 |
| 2 | Natrona County | 79,555 | 5,340 | 14.90 |
| 3 | Campbell County | 46,401 | 4,797 | 9.67 |
| 4 | Sweetwater County | 41,614 | 10,426 | 3.99 |
| 5 | Fremont County | 39,336 | 9,183 | 4.28 |
| 6 | Albany County | 37,608 | 4,274 | 8.80 |
| 7 | Sheridan County | 31,646 | 2,523 | 12.54 |
| 8 | Park County | 30,108 | 6,943 | 4.34 |
| 9 | Teton County | 23,575 | 4,008 | 5.88 |
| 10 | Uinta County | 20,635 | 2,082 | 9.91 |
| 11 | Lincoln County | 20,153 | 4,069 | 4.95 |
| 12 | Carbon County | 14,649 | 7,897 | 1.86 |
| 13 | Converse County | 13,672 | 4,255 | 3.21 |
| 14 | Goshen County | 12,537 | 2,225 | 5.63 |
| 15 | Big Horn County | 11,632 | 3,137 | 3.71 |
| 16 | Platte County | 8,699 | 2,085 | 4.17 |
| 17 | Sublette County | 8,697 | 4,882 | 1.78 |
| 18 | Johnson County | 8,623 | 4,166 | 2.07 |
| 19 | Washakie County | 7,705 | 2,240 | 3.44 |
| 20 | Crook County | 7,315 | 2,859 | 2.56 |
| 21 | Weston County | 6,745 | 2,398 | 2.81 |
| 22 | Hot Springs County | 4,597 | 2,004 | 2.29 |
| 23 | Niobrara County | 2,438 | 2,626 | 0.93 |
Source: US Census report 2021
read about race and ethnicity in Wyoming
Top cities in Wyoming by population
Wyoming has 23 counties and 99 municipalities consisting of 19 cities and 80 towns. Wyoming’s largest city by population is the capital city Cheyenne with 65,132 residents, and the largest city by land area is Casper, which covers 26.9 sq mi. Other Big cities are Casper (59,038), Gillette (33,403), and Laramie (31,407)
Let’s have a look at the Top 20 Cities and Towns in Wyoming by population
| # | City | County | Population | Area (sq. mi.) |
| 1 | Cheyenne | Laramie | 65,132 | 24.52 |
| 2 | Casper | Natrona | 59,038 | 26.9 |
| 3 | Gillette | Campbell | 33,403 | 18.97 |
| 4 | Laramie | Albany | 31,407 | 17.74 |
| 5 | Rock Springs | Sweetwater | 23,526 | 19.34 |
| 6 | Sheridan | Sheridan | 18,737 | 10.93 |
| 7 | Green River | Sweetwater | 11,825 | 13.72 |
| 8 | Evanston | Uinta | 11,747 | 10.27 |
| 9 | Jackson | Teton | 10,760 | 2.91 |
| 10 | Riverton | Fremont | 10,682 | 9.86 |
| 11 | Cody | Park | 10,028 | 10.2 |
| 12 | Rawlins | Carbon | 8,221 | 8.24 |
| 13 | Lander | Fremont | 7,546 | 4.66 |
| 14 | Powell | Park | 6,419 | 4.24 |
| 15 | Douglas | Converse | 6,386 | 4.58 |
| 16 | Torrington | Goshen | 6,119 | 4.62 |
| 17 | Worland | Washakie | 4,773 | 4.56 |
| 18 | Buffalo | Johnson | 4,415 | 4.46 |
| 19 | Mills | Natrona | 4,034 | 2.15 |
| 20 | Wheatland | Platte | 3,588 | 4.1 |
Source: US Census 2020
Most Populous Counties in Wyoming
The most populous county in Wyoming is Laramie County with 100,863 residents. It was followed by Natrona County (79,555) and Campbell County (46,401)
Let’s have a look at the Top 10 most populous counties
| # | County | Population 2020 |
| 1 | Laramie | 100,863 |
| 2 | Natrona | 79,555 |
| 3 | Campbell | 46,401 |
| 4 | Sweetwater | 41,614 |
| 5 | Fremont | 39,336 |
Least Populated Wyoming County
The least populous county is Niobrara County with 2,438 residents, it’s followed by Hot Springs County and Weston County.
Let’s have a look at 5 least populated counties in Wyoming
| # | County | Population 2020 |
| 1 | Niobrara | 2,438 |
| 2 | Hot Springs | 4,597 |
| 3 | Weston | 6,745 |
| 4 | Crook | 7,315 |
| 5 | Washakie | 7,705 |
source: US Census 2021
read about religion in Wyoming
Largest counties in Wyoming by area
The Largest county by Land Area in Wyoming is Sweetwater County with an area of 10,426 sq. miles. Fremont County with an area of 9,183 sq. mi. comes next followed by Carbon County (7,897 sq. mi.)
Let’s have a look at the Top 10 counties by Area
| # | County | Area (sq. mi.) |
| 1 | Sweetwater | 10,426 |
| 2 | Fremont | 9,183 |
| 3 | Carbon | 7,897 |
| 4 | Park | 6,943 |
| 5 | Natrona | 5,340 |
Smallest County in Wyoming by area
The smallest county by area in Wyoming is Hot Springs County with an area of 2,004 square miles.
| # | County | Area (sq. mi.) |
| 1 | Hot Springs | 2,004 |
| 2 | Uinta | 2,082 |
| 3 | Platte | 2,085 |
| 4 | Goshen | 2,225 |
| 5 | Washakie | 2,240 |
source: US Census report 2021
Most densely populated Counties in Wyoming
The most densely populated county in Wyoming is Laramie County, with 37.55 people per sq. mi. Next comes Natrona County with 15 people per sq. mi. followed by Sheridan County (12.5/ sq.mi)
Let’s have a look at the Top 10 densely populated counties
| # | County | Density (people/sq. mi.) |
| 1 | Laramie | 37.55 |
| 2 | Natrona | 14.90 |
| 3 | Sheridan | 12.54 |
| 4 | Uinta | 9.91 |
| 5 | Campbell | 9.67 |
Least Densely Populated County in Wyoming
Niobrara County with a population density of just 0.93 people per sq. miles is the least densely populated county in Wyoming
| # | County | Density (people/sq. mi.) |
| 1 | Niobrara | 0.93 |
| 2 | Sublette | 1.78 |
| 3 | Carbon | 1.86 |
| 4 | Johnson | 2.07 |
| 5 | Hot Springs | 2.29 |
source: US Census 2021
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