As of the 2010 census, the top five Wyoming cities are Cheyenne, Casper, Laramie, Gillette and Rock Springs. Wyoming is the least populous state in the United States, so it stands to reason that the size of each of its major cities pales in comparison to many other states.
Top-ranked Cheyenne is the state capital and county seat of Laramie County and boasts a population of 59,466. The city lies less than 15 miles from the Colorado border in the southeast corner of the state, making it one of the least centralized capital cities in the nation.
The city of Casper, county seat of Natrona County in the east-central part of the state, comes in at a close second with 55,316 people. The population of third-ranked Laramie stands at 30,816. The city is the highest in elevation of the top 10 Wyoming cities, lying at 7,165 feet above sea level. Gillette, in the northeast corner of the state, is No. 4 at 29,087. Rock Springs is situated in Sweetwater County and comes in at number five with 23,036 citizens.
Rounding out the top ten cities in Wyoming, Sheridan is the sixth largest, followed by Green River, Evanston, Riverton and No.10 Jackson with a population of 9,577.