The Ōreti River (formerly the Oreti River) is one of the main rivers of Southland, New Zealand, and is 170 kilometres (110 mi) long. The river has been identified as an Important Bird Area by BirdLife International because, for much of its length, it supports breeding colonies of black-billed gulls.
The New Zealand Ministry for Culture and Heritage gives a translation of "place of the snare" for Ōreti. In November 2019, the name of the river was officially altered to Ōreti River.