Pennington County, Minnesota
| Pennington County | |
|---|---|
| Old Carnegie Library, downtown Thief River Falls, Minnesota. | |
| Location within the U.S. state of Minnesota | |
| Minnesota's location within the U.S. | |
| Coordinates: 48°04′N 96°02′W / 48.07°N 96.04°W | |
| Country | United States | 
| State | Minnesota | 
| Founded | November 23, 1910 | 
| Named after | Edmund Pennington | 
| Seat | Thief River Falls | 
| Largest city | Thief River Falls | 
| Area | |
|  • Total | 618 sq mi (1,600 km2) | 
| • Land | 617 sq mi (1,600 km2) | 
| • Water | 1.7 sq mi (4 km2) 0.3% | 
| Population  (2020) | |
|  • Total | 13,992 | 
|  • Estimate  (2023) | 13,714 | 
| • Density | 22.7/sq mi (8.8/km2) | 
| Time zone | UTC−6 (Central) | 
| • Summer (DST) | UTC−5 (CDT) | 
| Congressional district | 7th | 
| Website | co | 
Pennington County is a county in the northwestern part of the U.S. state of Minnesota. As of the 2020 census, the population was 13,992. Its county seat is Thief River Falls.