Cass Lake is a city in Cass County, Minnesota, United States, located within the boundaries of the Leech Lake Indian Reservation. It is surrounded by Pike Bay Township. Cass Lake had a population of 675 in the 2020 census. It is notable as the headquarters location of Minnesota Chippewa Tribe and Leech Lake Band of Ojibwe, as well as the Chippewa National Forest. The city is located on the shore of its namesake Cass Lake, which was named in honor of Michigan Governor Lewis Cass.