康契钦县（Koochiching County, Minnesota）是美国明尼苏达州北部的一个县，北邻加拿大。面积8,170平方公里。根据美国2000年人口普查，共有人口14,355。县治国际瀑布城 (International Falls)。

成立于1906年12月19日。县名来自克里语对雷尼湖的称呼。

Koochiching County (/ˈkuːtʃᵻtʃᵻŋ/ KOOCH-əch-əng) is a county located in the U.S. state of Minnesota. As of the 2010 census, the population was 13,311. 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.