Lake Superior is the largest of the Great Lakes of North America, the world's largest freshwater lake by surface area, and the third-largest freshwater lake by volume. It is shared by Ontario to the north, Minnesota to the west, and Wisconsin and the Upper Peninsula of Michigan to the south.

Lake Superior has a surface area of 31,700 square miles which is approximately the size of South Carolina or Austria. It has a maximum length of 350 statute miles and maximum breadth of 160 statute miles.