Which lake is the largest by surface area touching Michigan?

The largest lake by surface area that touches Michigan is Lake Superior. Covering an area of approximately 31,700 square miles, it outstrips the surface area of the other Great Lakes. Lake Michigan, while significant and entirely within the United States, has a surface area of about 22,300 square miles. Lake Huron, which is composed of many islands and has a surface area of around 23,000 square miles, includes the area of the Georgian Bay but is still smaller than Lake Superior. Lake Erie is the smallest of the Great Lakes by surface area, measuring about 9,910 square miles. Therefore, Lake Superior is the correct answer as it is the largest by surface area of all the lakes bordering Michigan.