SS Cyprus was a lake freighter that sank during a gale storm on Lake Superior on 11 October 1907. The ship went down in 460 feet of water at 46.79°N 85.60°W, about 8 miles north of Deer Park in Luce County, Michigan. All but one of the 23 members of the crew perished.

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.