what county is casper, wy in
Casper (Lakota: PahÃ¡Å¡aÅ¡a OtÈÃºÅwahe; Red Hill City) is a city in and the county seat of Natrona County, Wyoming, United States. Casper is the second-largest city in Wyoming, according to the 2010 census, with a population of 55,316. Only Cheyenne, the state capital, is larger. Casper is nicknamed The Oil City and has a long history of oil boomtown and cowboy culture, dating back to the development of the nearby Salt Creek Oil Field.