The Letaba River also known as Leţaba or Lehlaba, is a river located in eastern Limpopo Province, South Africa. It is one of the most important tributaries of the Olifants River. It starts at the confluence of the Great Letaba and Little Letaba Rivers, whence they continue their journey eastwards through the Lowveld as the Letaba River. It joins the Olifants River in the foothills of the Lebombo Mountains, near South Africa's border with Mozambique. In Mozambique the latter river is called the Rio Elefantes. Tributaries include the Middle Letaba River, Nharhweni River, Ngwenyeni River, Nwanedzi River, Molototsi River, Nsama River and Makhadzi River.