450 (2002 UNSD).
Cagayan Valley region: Cagayan province, Claveria and Santa Praxedes municipalites; Cordillera Administrative Region: Abra province, scattered along west Apayao province border; Apayao province northern two-thirds; Ilocos region: Ilocos Norte province, scattered along west Apayao border.
Bayag, Dibagat-Kabugao, Calanasan, Karagawan (Daragawan), Talifugu-Ripang (Tawini). Calanasan dialect 94% intelligibility of Dibagat dialect, 88% of Ilocano [ilo]; Talifugu-Ripang 89% of Dibagat, 71% of Ilocano.
Also use Ilocano [ilo].
Latin script [Latn].