How much of the surface area of the great lakes is in Canada how much in the US?

The Great Lakes consist of five lakes: Superior, Michigan, Huron, Erie, and Ontario. Approximately 18% of the surface area of the Great Lakes is located in Canada, primarily in Lakes Huron, Erie, and Ontario, while about 82% is in the United States. Lake Michigan is entirely within the U.S., while the other lakes are shared by both countries.