The Ilocano people, also referred to as Ilokáno, Ilóko, Ilúko, or Samtóy, are an Austronesian ethnolinguistic group native to the Philippines. Originally from the Ilocos Region on the northwestern coast of Luzon, they have since spread throughout northern and central Luzon, particularly in the Cagayan Valley, the Cordillera Administrative Region, and the northern and western areas of Central Luzon. The Ilocanos constitute the third-largest ethnolinguistic group in the Philippines. Their native language is called Iloco or Iloko.