Who were the original inhabitants of the narrow coastal plains of northwestern Luzon?

History · Published 3 October 2026 Swipe more like this →

In short: The Ilocano people, the third-largest ethnolinguistic group in the Philippines, have long occupied the rugged coastal strip of northwestern Luzon. While their identity was later reshaped by Spanish colonization, their history is rooted in ancient maritime trade networks and a complex social hierarchy that predates the arrival of European explorers.

When Spanish explorers first encountered the Ilocano in the 16th century, they found a population concentrated along the narrow coastal plain of northwestern Luzon, a region now known as the Ilocos. This geography defined their early existence, as the Ilocano range—a largely volcanic chain rising above 5,000 feet—runs closely along the west coast, separating these communities from the interior. Historically, the Ilocano were both seafarers and agriculturalists, participating in a vast maritime trade network that connected them to foreign merchants from China and Japan, as well as neighboring groups like the Cordillerans.

The social structure of early Ilocano settlements, or íli, was strictly hierarchical. Leadership was typically held by a chieftain, known as an agtúray or ári, whose authority was often hereditary and based on a combination of wisdom, wealth, and strength. Beneath the chieftain were the babaknáng, a wealthy class that dominated trade, followed by tenant farmers, and finally, a class of servants and slaves. This society relied on the exchange of commodities such as gold, silk, porcelain, and rice, which moved through the Indian Ocean and South China Sea.

Genetic research suggests the Ilocano arrived in the Philippines during a second major wave of Austronesian migration, distinct from the earlier groups that settled near the Cordillera Central. Before the Spanish introduced their own linguistic conventions—including the suffix -ano to denote identity—the Ilocano referred to themselves as Samtóy, a contraction meaning 'our language here.' While Spanish rule eventually left a lasting mark on the region's religion and culture, the Ilocano maintained their distinct identity, eventually expanding their population from the original coastal plains to provinces across northern and central Luzon.

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