The Red Lake Indian Reservation (Ojibwe: Miskwaagamiiwi-zaaga'iganing) covers 1,260.3 sq mi (3,264 km; 806,600 acres) in parts of nine counties in Minnesota, United States. It is made up of numerous holdings but the largest section is an area around Red Lake, in north-central Minnesota, the largest lake in the state. This section lies primarily in the counties of Beltrami and Clearwater. Land in seven other counties is also part of the reservation. The reservation population was 5,506 in the 2020 census.
The second-largest section (49°16′N 95°03′W / 49.267°N 95.050°W) is much farther north, in the Northwest Angle of Lake of the Woods County near the Canada–United States border. It has no permanent residents. Between these two largest sections are hundreds of mostly small, non-contiguous reservation exclaves in the counties of Beltrami, Clearwater, Lake of the Woods, Koochiching, Roseau, Pennington, Marshall, Red Lake, and Polk. Home to the federally recognized Red Lake Band of Chippewa, it is unique as the only "closed reservation" in Minnesota. In a closed reservation, all land is held in common by the tribe and there is no private property.