Cagayan Valley

Cagayan Valley
Tanap ti Cagayan
Clockwise from the top: Sabtang Beach, Governor's Rapids, Palaui Island, Bayombong Cathedral, Buntun Bridge, Sabtang Island, Tuguegarao Cathedral, Callao Cave, Tumauini Church, and Basco Lighthouse.
Location in the Philippines
Interactive map of Cagayan Valley
Country Philippines
Island groupLuzon
Regional center
and largest city
Tuguegarao
Area
 • Total
28,228.83 km2 (10,899.21 sq mi)
Highest elevation2,928 m (9,606 ft)
Population
 (2024 census)
 • Total
3,777,608
 • Estimate 
(2020)
3,657,741
 • Density133.8209/km2 (346.5946/sq mi)
GDP (Nominal, 2024)
 • TotalUS$9.9 billion (2024)
 • Per capitaUS$2,606
Time zoneUTC+8 (PST)
ISO 3166 codePH-02
Provinces
Independent cities
Component cities
Municipalities89
Barangays2,311
Cong. districts12
Languages
HDI 0.727 (High)
HDI rank5th (2023)

Cagayan Valley (Ilocano: Tanap ti Cagayan; Filipino: Lambak ng Cagayan; Spanish: Valle del Cagayán), designated as Region II, is an administrative region in the Philippines. Located in the northeastern section of Luzon, it is composed of five Philippine provinces: Batanes, Cagayan, Isabela, Nueva Vizcaya, and Quirino. The region hosts four chartered cities: Cauayan, Ilagan, Santiago, and Tuguegarao (the regional center and largest city).

Most of its land area lies in the valley between the Cordilleras and the Sierra Madre mountain ranges. The eponymous Cagayan River, the country's largest and longest, runs through the region, flows from the Caraballo Mountains, and ends in Aparri. Cagayan Valley is the second-largest Philippine administrative region by land area. According to a literacy survey in 2019, 93% of Cagayan Valley's citizens (ages 10 to 64) are functionally literate, which is 5th out of the 17 regions of the Philippines.