The Ilocos Region or Region I of the Philippines is located in the northwestern region portion of Luzon. It is bounded by the Cordillera Administrative Region and Cagayan Valley to the east, Central Luzon to the south and by the South China Sea to the west.

The Ilocos provinces of the Ilocos Region is the historical homeland of the Ilocanos including Former Philippine President Ferdinand Marcos, the Filipino Martial Law dictator.

Vigan City, is famous for its cobblestone streets and Spanish-style houses, an architectural remnant of its colonial past. The Mestizo District displays mansions typical of the era. They were owned by prominent Ilocano-Chinese merchant families of that time, hence or "mixed race".  For this, the city is inscribed in UNESCO's list of World Heritage Sites.