Four of the five Great Lakes border Canada: Lake Erie, Lake Huron, Lake Ontario and Lake Superior. Lake Michigan is the only one that does not border Canada; it is located completely within U.S. borders.
Lake Superior is the largest and westernmost of the Great Lakes and the second largest lake in the world. Its surface area is 31,000 square miles. Lake Michigan lies directly to the east of Lake Superior, and Lake Huron lies east of lake Michigan. Lake Huron is the fifth-largest fresh-water lake in the world, with a surface area of 23,000 square miles. The easternmost lake is Lake Ontario; its surface area is just 7,000 square miles. Lake Erie lies south of Lake Ontario and east of Lake Huron, and it has a surface area of nearly 10,000 square miles. These four lakes all border the Canadian province of Ontario.