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.
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.
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%).