Natrona County, Wyoming, USA
County or equivalent
Location overview
Natrona County is in central Wyoming, with Casper as its largest city and county seat. The North Platte River crosses the area near Casper, and Casper Mountain rises south of the city. Ranching and railroad connections shaped settlement in the late 19th century. The county was established in 1890, and oil and gas development later became an important part of its history.