Apayao, officially the Province of Apayao (Ilocano: Probinsia ti Apayao; Itawit: Provinsiya ya Apayao; Isnag: Provinsia nga Apayao; Tagalog: Lalawigan ng Apayao), is a landlocked province in the Philippines in the Cordillera Administrative Region in Luzon. Kabugao serves as its capital. The provincial capitol and its associated offices are located at the New Government Center in Luna.
The province borders Cagayan to the north and east, Abra and Ilocos Norte to the west, and Kalinga to the south. Prior to 1995, Kalinga and Apayao comprised a single province named Kalinga-Apayao, which was partitioned to better service the needs of individual ethnic groups.