Casper
- County:
- Natrona County
- County Seat:
- Yes
- Area (mi²):
- 26.753
- State:
- Wyoming
Casper is a city located in Natrona County, Wyoming. Casper has a 2026 population of 58,823. It is also the county seat of Natrona County. Casper is currently growing at a rate of 0.13% annually but its population has decreased by -0.83% since the most recent census, which recorded a population of 59,315 in 2020.