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Population of Counties in Wyoming (2023)

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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%).

Population of Counties in Wyoming (2023)

Lists of Counties in all States

  1. Wyoming Economic Analysis Division
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)