The Oṣun River (sometimes, but rarely spelt Oshun) is a river that flows southwards through central Yorubaland in southwestern Nigeria into the Lagos Lagoon and the Atlantic Gulf of Guinea. It is one of the several rivers ascribed in local mythology to have been women who turned into flowing waters after some traumatic event frightened or angered them.
Oṣun was reputedly one of the wives of Ṣango, the Yoruba god of thunder. The annual traditional worship at the Ọṣun Shrine near the Ọṣun River at Osogbo has become an important tourist attraction, drawing people from various parts of Nigeria and countries far beyond to the annual festival in August.