Birch Lake is an unorganized territory in Saint Louis County, Minnesota, United States, located north of Babbitt, and south of Ely and Morse Township. The population was 648 at the 2000 census. According to the United States Census Bureau, the unorganized territory has a total area of 70.4 square miles, of which 57.8 square miles is land and 12.6 squar…Birch Lake is an unorganized territory in Saint Louis County, Minnesota, United States, located north of Babbitt, and south of Ely and Morse Township. The population was 648 at the 2000 census. According to the United States Census Bureau, the unorganized territory has a total area of 70.4 square miles, of which 57.8 square miles is land and 12.6 square miles is water.