Aitkin County, Minnesota
| Aitkin County | |
|---|---|
| Location within the U.S. state of Minnesota | |
| Minnesota's location within the U.S. | |
| Coordinates: 46°37′N 93°25′W / 46.61°N 93.41°W | |
| Country | United States | 
| State | Minnesota | 
| Founded | May 23, 1857 (created) June 30, 1871 (organized) | 
| Named after | William Alexander Aitken | 
| Seat | Aitkin | 
| Largest city | Aitkin | 
| Area | |
|  • Total | 1,995 sq mi (5,170 km2) | 
| • Land | 1,822 sq mi (4,720 km2) | 
| • Water | 174 sq mi (450 km2) 8.7% | 
| Population  (2020) | |
|  • Total | 15,697 | 
|  • Estimate  (2023) | 16,102 | 
| • Density | 8.69/sq mi (3.36/km2) | 
| Time zone | UTC−6 (Central) | 
| • Summer (DST) | UTC−5 (CDT) | 
| Congressional district | 8th | 
| Website | www | 
Aitkin County (/ˈeɪkɪn/ AY-kin) is a county in the U.S. state of Minnesota. As of the 2020 census, the population was 15,697. Its county seat is Aitkin. Part of the Mille Lacs Indian Reservation is in the county. The county was created in 1857 and organized in 1871.