Amburayan was a former administrative division of the Philippines, existing as a politico-military comandancia from 1890 to 1902, and a sub-province from 1902 to 1920. Its territory encompassed most of the Amburayan River watershed, initially predominantly inhabited by the Kankana-ey. The sub-province ceased to exist when its territory was divided between Ilocos Sur, La Union, and Mountain Province (sub-province of Benguet) in 1920.