Mud Lake is an unorganized territory located in Marshall County, Minnesota. As of the 2000 census, the unorganized territory had a total population of 0.
According to the United States Census Bureau, the unorganized territory has a total area of 36.0 square miles (93.2 km²), of which 31.3 square miles (81.1 km²) of it is land and 4.7 square miles (12.1 km²) of it (13.03%) is water.
As of the census of 2000, there are no people living in the unorganized territory.
Coordinates: 48°19′26″N 95°54′48″W / 48.32389°N 95.91333°W / 48.32389; -95.91333