The Mitchigan River is a 14.9-mile-long (24.0 km) stream in the Upper Peninsula of the U.S. state of Michigan. It flows into the Fence River at (46°17′27″N88°09′58″W) in northeast Iron County in Mansfield Township. The Fence River is a tributary of the Michigamme River, which is itself a tributary the Menominee River, flowing to Lake Michigan. The Mitchigan River has its source in the southeast corner of Baraga County at (46°24′58″N88°08′05″W)