Luzon Region
Calabarzon (Region IV-A) was previously called the Southern Tagalog Region. It is made up of five provinces: CAvite, LAguna, BAtangas, Rizal, and QueZON. It is located southease of Metro Manila and is bordered by Manila Bay to the west, Lamon Bay and the Bicol Region to the east, the Tayabas Bay and Sibuyan Sea to the south, and the Central Luzon region to the north.
Central Luzon (Region III) is located north of Metro Manila on the main island of Luzon. It includes the provinces of Aurora, Bataan, Bulacan, Nueva Ecija, Pampanga, Tarlac and Zambales. Towering mountains, volcanos, lush farmlands, natural sea harbors and more can be found here.
The Cagayan Valley (Region II) is made up of the provinces of Cagayan, Isabela, Nueva Vizcaya, Quirino, and the Batanes group of islands. It is bordered to the west by the Cordillera mountain range, to the east by the Sierra Madre, to the south by the Caraballo Mountains, and to the north by the Luzon Strait. The main cities in this region are Cauayan, Ilagan, Santiago, and Tuguegaro.
Ilocos (Region I) lies on the northwestern section of Luzon. It also straddles part of the Central Luzon plain, primarily in Pangasinan province. It is bordered by the Cordillera Administrative Region to the east, the Cagayan Valley to the northeast and southeast, and the Central Luzon to the south. To the west lies the South China Sea. The region is made up of four provinces (Ilocos Norte, Ilocos Sur, La Union and Pangasinan) and one independent city, Dagupan.
