Ilocos Region

Ilocos
Deppaar ti Ilocos
Sagor na Baybay na Luzon
Clockwise from the top: Paoay Church, Baluarte Watch Tower, La Paz Sand Dunes, Bangui Wind Farm, Elyu Surf, Manaoag Church, Cape Bojeador Lighthouse, Calle Crisologo, Hundred Islands National Park, Bantay Bell Tower
Location in the Philippines
Interactive map of Ilocos
Coordinates: 16°37′N 120°19′E / 16.62°N 120.32°E / 16.62; 120.32
Country Philippines
Island groupLuzon
Regional centerSan Fernando (La Union)
Largest citySan Carlos (Pangasinan)
Area
 • Total
13,013.60 km2 (5,024.58 sq mi)
Highest elevation2,361 m (7,746 ft)
Population
 (2024 census)
 • Total
5,342,453
 • Density410.5284/km2 (1,063.264/sq mi)
GDP (Nominal, 2024)
 • TotalUS$15.4 billion
 • Per capitaUS$2,872
Time zoneUTC+8 (PST)
ISO 3166 codePH-01
Provinces
Independent cities
Component cities
Municipalities116
Barangays3,267
Cong. districts12
Languages
HDI 0.720 (High)
HDI rank8th (2023)
Preview warning: Using more than one of the following parameters in Template:Infobox settlement: blank3_name_sec1, blank3_name.
Using more than one of the following parameters in Template:Infobox settlement: blank3_info_sec1, blank3_info.

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.