According to the U.S. Census Bureau, Wyoming's two largest cities -- Cheyenne and Casper -- have lost population since 2020

 

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Source:  U.S. Census Bureau

Wyoming Administration and Information, 5/18/2023

Two-thirds of the thirty large cities and towns (over 2,000 people) in Wyoming added residents between July 1, 2021 and July 1, 2022 when the largest cities, Cheyenne and Casper, both lost population, according to population estimates released by the U.S. Census Bureau. These new estimates provide a look at how the population has changed in each of Wyoming’s incorporated communities since the 2020 Census.

Other states' top 10.

Alabama.  (6/27/2023)

Illinois.  (6/27/2023)

Iowa.  (6/27/2023)

Massachusetts.  (6/27/2023)

Minnesota.  (6/28/2023)

Montana.  (6/27/2023)

North Dakota.  (6/29/2023)

Ohio.  (6/27/2023)

South Dakota.  (6/29/2023)

West Virginia.  (6/27/2023)

Wisconsin.  (6/27/2023)