Casper is 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 53,569. Casper is nicknamed "The Oil City" and has a long history of oil boomtown and cowboy culture, dating back to development of the nearby Salt Creek Oil Field.
The city was established east of the former site of Fort Caspar, which was built during the mid-19th century mass migration of land seekers along the Oregon, California and Mormon trails. . The area was the location of several ferries that offered passage across the North Platte River in the early 1840s. In 1859, Louis Guinard built a bridge and trading post near the original ferry locations.
According to the United States Census Bureau, the city has a total area of 24.3 square miles (62.8 km²), of which, 24.0 square miles (62.0 km²) of it is land and 0.3 square miles (0.8 km²) of it (1.32%) is water.
In the city the population was spread out with 25.9% under the age of 18, 10.5% from 18 to 24, 27.7% from 25 to 44, 22.3% from 45 to 64, and 13.6% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 95.0 males. For every 100 females age 18 and over, there were 91.6 males.
Casper is home to Casper College, a community college that offers bachelors degrees in sixteen areas of study from the University of Wyoming through their UW/CC Center.
Public education in the city of Casper is provided by Natrona County School District #1. The district operates sixteen elementary schools, five middle schools, and three high schools in Casper. The high schools include Kelly Walsh, Natrona, and Roosevelt High Schools.