Ilocos Region

The Ilocos Region (Ilocano: Rehion/Deppaar ti Ilocos; Pangasinan: Rehiyon na Ilocos; Tagalog: Rehiyon ng Ilocos), designated as Region I, is an administrative region of the Philippines. Located in the northwestern section of Luzon, it is bordered by the Cordillera Administrative Region to the east, the Cagayan Valley to the northeast and southeast, Central Luzon to the south, and the South China Sea to the west. The region comprises four provinces: Ilocos Norte, Ilocos Sur, La Union, and Pangasinan, along with one independent-component city, Dagupan City. The regional center is the city of San Fernando in La Union, which serves as the administrative hub of the region. The largest settlement in terms of population is San Carlos City in Pangasinan.

The 2020 Philippine Statistics Authority census reported that the ethnolinguistic group composition of the region is predominantly made up of Ilocanos (58.3%), followed by Pangasinans (29.7%), Tagalogs (4.1%), and various Cordilleran (Igorot) indigenous groups.

Natural attractions include hiking along the foothills of the Cordillera, scenic waterfalls and rivers, various surfing destinations with San Juan as the Surfing Capital of the North, beaches, and island-hopping in the Hundred Islands National Park. Cultural attractions include Spanish colonial buildings and structures, including two UNESCO World Heritage sites: the Baroque churches of Paoay, Ilocos Norte and Santa Maria, Ilocos Sur; and the colonial city of Vigan.

The region was originally inhabited by Negritos as early as 30,000 BC but over time, these early settlers were displaced by successive waves of Austronesian migrants who arrived via the region's narrow coastal areas using traditional boats known as balangay boat (referred to as biray or bilog in Ilocano). The migrations are explained by the widely accepted "Out of Taiwan" hypothesis, which posits that Neolithic Austronesian peoples migrated from Taiwan, forming the ancestral populations of contemporary Austronesians.

Austronesians are believed to have originated from Southern China or Taiwan and arrived in the Philippines through at least two major migration waves. The first wave, approximately 10,000 to 7,000 years ago, brought the ancestors of indigenous groups in the Cordillera Central mountain range. Subsequent migrations introduced additional Austronesian populations, along with agricultural practices, which eventually supplanted the languages of earlier inhabitants.

These Austronesian settlers included the Cordilleran (Igorot) groups, such as the Itneg (Tingguian) and the Isnag in the northern highlands, as well as the Kankanaey and Ibaloi in the southern highlands, who arrived during the first wave of migration. The second wave brought the Ilocanos, who settled in the northern coastal areas, alongside the Pangasinans, Bolinao and Zambals, who established communities in the southern and southwestern coastal zones.

With the establishment of commercial trading routes in Southeast Asia, settlements in the region flourished both culturally and economically through maritime trade.

The Ilocanos, known as Samtoy in pre-colonial times, actively traded goods and products with local and foreign merchants, including the Chinese and Japanese. One notable coastal trading post was Bee Gan (Chinese: 美岸; měi'àn; bí-gān), meaning "beautiful shore," which is now the city of Vigan. This site served as a significant hub for early Ilocano trade.