Native toPhilippines
RegionAurora, Luzon
Native speakers
(10,000 cited 1975)[1]
Language codes
ISO 639-3ksn

Kasiguranin (Casiguranin) is a Tagalogic language that is indigenous to the Casiguran town of Aurora in the northern Philippines. It is descended from an early Tagalog dialect that had borrowed heavily from Northeastern Luzon Agta languages, and, to a lesser extent, from Ilocano (the dominant native language of north Aurora), Bikol languages, Kapampangan, Gaddang, Itawis and Ibanag, which were spoken by settlers from other parts of the Philippines.[2]

Dilasag, Dinapigue, Maconacon, and Divilacan are primarily Ilocano-speaking towns just to the north of Casiguran.[3] Dinalungan, Dipaculao, and Maria Aurora are the other primarily Ilocano-speaking towns just south of Casiguran.

Kasiguranin speakers speak Ilocano & Tagalog as additional languages, as they are the dominant languages of Aurora.


  1. ^ Kasiguranin at Ethnologue (18th ed., 2015) (subscription required)
  2. ^ Robinson, Laura C.; Lobel, Jason William (2013). "The Northeastern Luzon Subgroup of Philippine Languages". Oceanic Linguistics. 52 (1): 129. doi:10.1353/ol.2013.0007. JSTOR 43286764. S2CID 143927521.
  3. ^ Northeastern Luzon Subgroup of Philippine languages