Natrona County is a county in the U.S. state of Wyoming. As of the 2010 United States Census, the population was 75,450, making it the second-most populous county in Wyoming. Its county seat is Casper.Natrona County comprises the Casper, WY Metropolitan Statistical Area.
In 2010, the center of population of Wyoming was in Natrona County, near Alcova.
Coordinates 42°51'59.875" N -106°18'47.092" E