Black River (St. Clair County)
 Black River is an 81.0-mile-long (130.4 km) river in the U.S. state of Michigan flowing into the St. Clair River at 42°58′19″N 82°25′06″W in the city of Port Huron. The Black River Canal in northern Port Huron extends east into Lake Huron near Krafft Road. The river rises in northern Sanilac County near the boundary with Huron County at 43°41′00″N 82°48′55″W and its drainage basin covers most of the central and southern portions of Sanilac County most of northern St.