Iwaak (also spelled I-wak or I'wak) is a South-Central Cordilleran language spoken by almost 3,300 people around the Cordillera Central mountain range of Luzon, Philippines. The Iwaak language is a Nuclear Southern Cordilleran language which is closely related to Ibaloi, Kalanguya, and Karao.
According to Ethnologue, in eastern Itogon municipality, Benguet Province, I-wak is spoken in Tojongan, Bakes, Lebeng, Domolpos, Bujasjas, and Kayo-ko villages. It is also spoken in Salaksak village, Kayapa municipality, Nueva Vizcaya Province.