Ngayawung (Ngaiawong ) is an extinct language of southern South Australia, spoken by the Ngaiawang, Ngaralti and Nganguruku people.
The name is also spelled Ngaiyau, Aiawung, Aiawong, Iawung, Nggauaiyowangko; other names are Birta, Pitta, Pieta, Peeita and Meru.