Nottawa Creek (also known as Nottawa River, Nottawaseepe River, and Nottawaseppe River) is a 33.9-mile-long (54.6 km) stream in the U.S. state of Michigan that flows into the St. Joseph River at 42°00′15″N 85°23′40″W, approximately three miles east of the village of Mendon.The Nottawa is formed by the outflow of Nottawa Lake in south central Calhoun County. The lake is fed by Nottawa Drain, which along with Goose Pond Drain drains an area to the east of the lake.