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There are 17 regions in the Philippines, spread over the the three Islands.
Eight of these regions are in Luzon, there are three in Visayas and six in Mindanao.
| Population [2010] | Region | Region No | Island | Regional center |
| 11,855,975 | National Capital Region | (NCR) | Luzon | Manila |
| 1,616,867 | Cordillera Administrative Region | (CAR) | Luzon | Baguio |
| 4,748,372 | Ilocos Region | (Region I) | Luzon | San Fernando, La Union |
| 3,229,163 | Cagayan Valley | (Region II) | Luzon | Tuguegarao |
| 10,137,737 | Central Luzon | (Region III) | Luzon | San Fernando, Pampanga |
| 12,609,803 | CALABARZON | (Region IV-A) | Luzon | Calamba, Laguna |
| 2,744,671 | MIMAROPA | (Region IV-B) | Luzon | Calapan |
| 5,420,411 | Bicol Region | (Region V) | Luzon | Legazpi |
| 7,102,438 | Western Visayas | (Region VI) | Visayas | Iloilo City |
| 6,800,180 | Central Visayas | (Region VII) | Visayas | Cebu City |
| 4,101,322 | Eastern Visayas | (Region VIII) | Visayas | Tacloban |
| 3,407,353 | Zamboanga Peninsula | (Region IX) | Mindanao | Pagadian |
| 4,297,323 | Northern Mindanao | (Region X) | Mindanao | Cagayan de Oro |
| 4,468,563 | Davao Region | (Region XI) | Mindanao | Davao City |
| 4,109,571 | SOCCSKSARGEN | (Region XII) | Mindanao | Koronadal |
| 2,429,224 | Caraga | (Region XIII) | Mindanao | Butuan |
| 3,256,140 | Autonomous Region in Muslim Mindanao | (ARMM) | Mindanao | Cotabato City |
1 : 90 : 3,503,153