Cook County is the easternmost county in the U.S. state of Minnesota. As of the 2020 census, the population was 5,600, making it Minnesota's seventh-least populous county. Its county seat is Grand Marais. The Grand Portage Indian Reservation is in the county.

Grand Marais is a city and the county seat of Cook County, Minnesota, United States, of which it is the only municipality. It is on Lake Superior's North Shore. Grand Marais had a population of 1,337 at the 2020 census. Before it was settled by French Canadians and before Minnesota's statehood, it was inhabited by the Ojibwe.