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Region I
It is located in the northwestern region portion of Luzon. It is bounded by the Cordillera Administrative Region and Cagayan Valley to the east, Central Luzon to the south and by the South China Sea to the west. The region is composed of four provinces, namely: Ilocos Norte, Ilocos Sur, La Union and Pangasinan.
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Region II
It is composed of five provinces, namely: Batanes, Cagayan, Isabela, Nueva Vizcaya, and Quirino. Its regional center is Tuguegarao City. Most of the region lies in a large valley in northeastern Luzon, between the Cordilleras and the Sierra Madre mountain ranges. Cagayan River, the country's longest river runs through its center and flows out to Luzon Strait in the north, in the town of Aparri, Cagayan. The Babuyan and Batanes island groups that lie in the Luzon Strait also belong to the region.
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Region III
It contains the largest plain of the Philippines, and produces most of the country's rice supply. That is why it is called the "Rice Bowl" of the Philippines. Its provinces are: Aurora, Bataan, Bulacan, Nueva Ecija, Pampanga, Tarlac, and Zambales.
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Region IV-A
CALABARZON is one of the regions of the Philippines. It is also designated as Region IV-A and its regional capital is Calamba City in Laguna. The region is composed of five provinces, namely: Cavite, Laguna, Batangas, Rizal, and Quezon. The region's name is an portmanteau of the names of these provinces.
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Region IV-B
MIMAROPA is one of the two regions of the Philippines having no land border with another region, Eastern Visayas being the other, and is designated as Region IV-B. The name is an acronym that stands for its provinces, which are: Occidental Mindoro, Oriental Mindoro, Marinduque, Romblon and Palawan. Palawan was subsequently moved by executive order from MIMAROPA to the more logical Western Visayas. Removing Palawan from MIMAROPA would have turned the region into MIMARO. Because of problems with implementation of the executive order, however, an administrative order was later issued holding implementation in abeyance. Presently, Palawan and the newly-declared highly urbanized city of Puerto Princesa still remain a part of this region.
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Region V
It consists of six provinces, namely, Albay, Camarines Norte, Camarines Sur, Catanduanes, Masbate, and Sorsogon. It has one independent component city, Naga City, and six component cities, Iriga, Legazpi, Ligao, Masbate, Sorsogon, and Tabaco. The regional centers are Legazpi City, the region's political and administrative center, and Naga City, the region's cultural and religious center. Legazpi and Naga are also the hub of the region's economic activity.
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Region VI
One of the regions of the Philippines, is designated as Region VI. It consists of eight provinces; Aklan, Antique, Negros Occidental, Capiz, Guimaras and Iloilo and 17 cities making it the region with the highest number of cities. Iloilo City is the regional center.
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Region VII
One of the regions of the Philippines, is designated as Region VII. It is part of the Visayas. It consists of four provinces, namely, Bohol, Cebu, Negros Oriental, and Siquijor. The region demarcates the territory occupied by the native speakers of Cebuano. The regional capital is Cebu City.
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Region VIII
One of the two regions of the Philippines having no land border with another region, MIMAROPA being the other, and is designated as Region VIII. It consists of six provinces, namely, Biliran, Eastern Samar, Leyte, Northern Samar, Samar (Western Samar) and Southern Leyte. These provinces occupy the easternmost islands of Visayas: Leyte, Samar and Biliran. The regional center is Tacloban City, one of three cities of Leyte. Calbayog City is one of the two cities in Western Samar, and is one of the oldest in the country.
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Region IX
Both a peninsula and an administrative region in the Philippines. Designated as Region IX, the region consists of three provinces, namely, Zamboanga del Norte, Zamboanga del Sur, and Zamboanga Sibugay, and the chartered city of Zamboanga City at the south-eastern tip. The region was previously known as Western Mindanao before the enactment of Executive Order No. 36 on September 19, 2001.
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Region X
Composed of five provinces and two cities classified as highly urbanized, all occupying the north-central part of Mindanao Island, and the island province of Camiguin. The regional center is Cagayan de Oro, where the national government's regional offices and other big establishments are located. Lanao del Norte was transferred from Region XII (then called Central Mindanao) by virtue of Executive Order No. 36.
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Region XI
One of the regions of the Philippines, located on the southeastern portion of Mindanao. Davao Region consists of four provinces, namely: Compostela Valley, Davao del Norte, Davao Oriental, and Davao del Sur. The region encloses the Davao Gulf and its regional center is Davao City. Davao is the Hispanicized pronunciation of daba-daba, the Bagobo word for "fire" (the Cebuano translation is "kayo").
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Region XII
The regional center is Koronadal City located in the province of South Cotabato. Cotabato City, though geographically within the boundaries of the province of Maguindanao, itself is part of SOCCSKSARGEN, and is independent of that province. Maguindanao province is a part of another special region called the ARMM which has its seat in Cotabato City.
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Region XIII
The regional center is Koronadal City located in the province of South Cotabato. Cotabato City, though geographically within the boundaries of the province of Maguindanao, itself is part of SOCCSKSARGEN, and is independent of that province. Maguindanao province is a part of another special region called the ARMM which has its seat in Cotabato City.
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Region CAR
Philippines' only land-locked region, consists of the provinces of Abra, Benguet, Ifugao, Kalinga, Mountain Province and Apayao. Baguio City is the regional center. The Cordillera region encompasses most of the areas within the Cordillera Central mountain range of Luzon, the largest range in the country. This region is home to numerous indigenous tribes collectively called the Igorot.
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Region NCR
The greater metropolitan area of the city of Manila, the national capital of the Philippines. Its residential population of 11,099,800 (2007 estimate) makes it the eleventh most populous metropolitan area in the world and the largest in Southeast Asia. However during the daytime its population well exceeds 16 million. Metro Manila is one of the three defined metropolitan areas in the Philippines, the others being Metro Cebu and Metro Davao.
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Region ARMM
The region of the Philippines that is composed of all the Philippines' predominantly Muslim provinces, namely: Basilan, Lanao del Sur, Maguindanao, Shariff Kabunsuan, Sulu and Tawi-Tawi, and the Philippines' only predominantly Muslim city, the Islamic City of Marawi. It is the only region that has its own government. The regional capital is at Cotabato City, although this city is outside of its jurisdiction.
