Koochiching County is a county in the U.S. state of Minnesota. As of the 2020 census, the population was 12,062. Its county seat is International Falls. A portion of the Bois Forte Indian Reservation is in the county. A small part of Voyageurs National Park extends into its boundary, with Lake of the Woods County to its northwest.

International Falls is a city in and the county seat of Koochiching County, Minnesota, United States. The population was 5,802 at the time of the 2020 census.