The Ohlanga River is a river in KwaZulu-Natal, South Africa, which empties into the Indian Ocean just north of uMhlanga, north of Durban. The river has extensive reed beds in the estuary at its mouth, which is only 7 km southwest from the mouth of the uMdloti River. Presently, this river is part of the Mvoti to Umzimkulu Water Management Area.

Umhlanga conservancy

At the river's mouth, a lagoon is surrounded by the Umhlanga Conservancy. This area includes a 26 ha Umhlanga Lagoon Nature Reserve, and a waste treatment works which is publicly accessible. This area contains bushbuck, blue and grey duiker, and numerous birds, including the southernmost occurrence of crested guineafowl.