Madeline Island is an island in Lake Superior. Located in Ashland County, Wisconsin, it has long been a spiritual center of the Lake Superior Chippewa. Although the largest of the Apostle Islands, it is not included in the Apostle Islands National Lakeshore. It is the only island in the Apostle Island chain open to commercial development and private ownership.

Lake Superior is the largest freshwater lake in the world by surface area and the third-largest freshwater lake by volume, holding 10% of the world's surface fresh water. Located in central North America, it is the northernmost and westernmost of the Great Lakes of North America, straddling the Canada–United States border with the Canadian province of Ontario to the north and east and the U.S. states of Minnesota to the west and Michigan and Wisconsin to the south. It drains into Lake Huron via St. Marys River, then through the lower Great Lakes to the St. Lawrence River and ultimately the Atlantic Ocean.