Population of Counties in Wyoming (2023)

There are 23 counties in Wyoming. The most populous county in the state is Laramie County, which is home to 98,976 residents. Laramie County accounts for 17.13% of Wyoming’s total population. Laramie County is also home to Cheyenne, the state capital. The second-most populous county is Natrona County, which has a population of 79,115 people, comprising 13,69% of Wyoming’s population. This is followed by Campbell County with a population of 46,140, accounting for 7.99% of the state’s population.

Wyoming Counties with the Fewest Residents

Of Wyoming’s 23 counties, Niobrara County is the least populous with 2,388 residents. Niobrara’s population accounts for just 0.41% of the state’s total population. Following Niobrara County is Hot Springs County with 4,555 people, comprising 0.79% of the state’s population. Weston County is the third-least populous county in Wyoming with 6,967 people, 1.21% of the population.

Five other counties have populations below 10,000: Crook, Washakie, Johnson, Platte, and Sublette.

Wyoming Counties with Rapid Growth

The Wyoming county with the highest population growth since the 2010 Census is Teton County, which grew by 8.38%. This is followed by Lincoln County and Laramie County, which have grown by 7.38% and 7.31% respectively.

While several counties have experienced population growth since 2010, others have experienced population decline. Washakie County experienced the most significant population decline of 7.56%, followed by Carbon County (5.53%) and Hot Springs (5.32%).