List of municipalities in Wyoming
Wyoming's largest municipality by population is the capital city Cheyenne with 59,466 residents, and the largest municipality by land area is Casper, which spans , while the smallest municipality in both categories is Lost Springs with 4 residents and an area of .
Sweetwater County, Wyoming
Sweetwater County is a county in southwestern Wyoming, United States. As of the 2010 United States Census, the population was 43,806. Its county seat is Green River. By area, it is the largest county in Wyoming. Its southern boundary line abuts the north lines of the states of Colorado and Utah.