Natrona County, Wyoming
| Natrona County | |
|---|---|
| Natrona County Courthouse in Casper | |
| Location within the U.S. state of Wyoming | |
| Wyoming's location within the U.S. | |
| Coordinates: 42°58′N 106°48′W / 42.97°N 106.8°W | |
| Country | United States | 
| State | Wyoming | 
| Named after | Natron deposits | 
| Seat | Casper | 
| Largest city | Casper | 
| Area | |
|  • Total | 5,376 sq mi (13,920 km2) | 
| • Land | 5,340 sq mi (13,800 km2) | 
| • Water | 35 sq mi (90 km2) 0.7% | 
| Population  (2020) | |
|  • Total | 79,955 | 
|  • Estimate  (2024) | 80,410 | 
| • Density | 15/sq mi (5.7/km2) | 
| Time zone | UTC−7 (Mountain) | 
| • Summer (DST) | UTC−6 (MDT) | 
| Congressional district | At-large | 
| Website | www | 
Natrona County is a county in the U.S. state of Wyoming. As of the 2020 United States census, the population was 79,955, 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.