Sunday Lake is an unorganized territory located in St. Louis County, Minnesota. As of the 2000 census, the unorganized territory was unpopulated.
According to the United States Census Bureau, the unorganized territory has a total area of 68.7 km² (26.5 mi²). 55.6 km² (21.5 mi²) of it is land and 13.2 km² (5.1 mi²) of it is water. The total area is 19.19% water.
See also: List of places with fewer than ten people
