Mahaska County, Iowa
| Mahaska County | |
|---|---|
| Location within the U.S. state of Iowa | |
| Iowa's location within the U.S. | |
| Coordinates: 41°20′02″N 92°38′44″W / 41.333888888889°N 92.645555555556°W | |
| Country | United States | 
| State | Iowa | 
| Founded | February 17, 1843 | 
| Named after | Chief Mahaska | 
| Seat | Oskaloosa | 
| Largest city | Oskaloosa | 
| Area | |
|  • Total | 573 sq mi (1,480 km2) | 
| • Land | 571 sq mi (1,480 km2) | 
| • Water | 2.5 sq mi (6 km2) 0.4% | 
| Population  (2020) | |
|  • Total | 22,190 | 
| • Density | 39/sq mi (15/km2) | 
| Time zone | UTC−6 (Central) | 
| • Summer (DST) | UTC−5 (CDT) | 
| Congressional district | 2nd | 
| Website | www | 
Mahaska County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 22,190. The county seat is Oskaloosa.
Mahaska County comprises the Oskaloosa, IA Micropolitan Statistical Area.