Poweshiek County, Iowa
| Poweshiek County | |
|---|---|
| Location within the U.S. state of Iowa | |
| Iowa's location within the U.S. | |
| Coordinates: 41°41′03″N 92°31′48″W / 41.6842°N 92.53°W | |
| Country | United States | 
| State | Iowa | 
| Founded | 1843 | 
| Named after | Poweshiek, Meskwaki chief | 
| Seat | Montezuma | 
| Largest city | Grinnell | 
| Area | |
|  • Total | 586 sq mi (1,520 km2) | 
| • Land | 585 sq mi (1,520 km2) | 
| • Water | 1.1 sq mi (3 km2) 0.2% | 
| Population  (2020) | |
|  • Total | 18,662 | 
| • Density | 32/sq mi (12/km2) | 
| Time zone | UTC−6 (Central) | 
| • Summer (DST) | UTC−5 (CDT) | 
| Congressional district | 2nd | 
| Website | poweshiekcounty | 
Poweshiek County is a county in the southeastern part of the U.S. state of Iowa. As of the 2020 United States census, the population was 18,662. The county seat is Montezuma. The county is named for the chief of the Meskwaki who signed the treaty ending the Black Hawk War. It lies along Interstate 80 between Des Moines and Iowa City. Poweshiek County's largest city is Grinnell.