Molunkus Stream is a tributary of the Mattawamkeag River in Maine. From the confluence of the stream's East Branch and West Branch (45°53′50″N 68°24′20″W / 45.8973°N 68.4055°W) in Sherman, the river runs 35.6 miles (57.3 km) southeast to its mouth on the Mattawamkeag in Kingman.