The Wai Wai (also written Waiwai or Wai-wai) are an indigenous peoples located in southern Guyana and northern Brazil.
There are approximately 200 Wai-wai in Guyana and 2000 in Brazil. In Brazil, they mostly reside in Terra Indígena Wai-wai, Terra Indígena Trombetas-Mapuera and Terra Indígena Nhamundá-Mapuera.