Ubangi River, a major tributary of the Congo River in equatorial Africa. The Ubangi is formed at the junction of the Uele and Bomu rivers. It then flows westward and southward for about 700 miles (1,125 km) to join the Congo near the Equator. The Ubangi separates the Democratic Republic of the Congo from the Central African Republic on the north and from the Republic of the Congo on the west.
Including the Uele, its longest headstream, the Ubangi is about 1,400 miles (2,250 km) long. The river is navigable except in its middle course, which is choked with rapids.