The Detroit River is a river in the Great Lakes system. The river connects Lake St. Clair to Lake Erie. It forms part of the border between Canada and the United States. It is 24 nautical miles (44 km; 28 mi) long. It divides the cities of Detroit and Windsor. It is one of the busiest waterways in the world.
The name comes from the French Rivière du Détroit, which means River of the Strait.