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Abra is a landlocked province of the Philippines in the Cordillera Administrative Region in Luzon. Its capital is Bangued and borders Ilocos Norte to the north, Apayao to the northeast, Kalinga to the east, Mountain Province to the south, and Ilocos Sur to the southwest.
Abra is subdivided into 27 municipalities.
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|- |style="padding:0px 5px" align="right"|Ilocos Region: |style="padding:0px 5px" | Ilocos Norte | Ilocos Sur | La Union | Pangasinan |- |style="padding:0px 5px" align="right"|Cagayan Valley: |style="padding:0px 5px" | Batanes | Cagayan | Isabela | Nueva Vizcaya | Quirino |- |style="padding:0px 5px" align="right"|Central Luzon: |style="padding:0px 5px" | Aurora | Bataan | Bulacan | Nueva Ecija | Pampanga | Tarlac | Zambales |- |style="padding:0px 5px" align="right"|CALABARZON: |style="padding:0px 5px" | Batangas | Cavite | Laguna | Quezon | Rizal |- |style="padding:0px 5px" align="right"|MIMAROPA: |style="padding:0px 5px" | Marinduque | Occidental Mindoro | Oriental Mindoro | Palawan | Romblon |- |style="padding:0px 5px" align="right"|Bicol Region: |style="padding:0px 5px" | Albay | Camarines Norte | Camarines Sur | Catanduanes | Masbate | Sorsogon |- |style="padding:0px 5px" align="right"|Cordillera Adm. Region: |style="padding:0px 5px" | Abra | Apayao | Benguet | Ifugao | Kalinga | Mountain Province |- |style="padding:0px 5px" align="right"|Metro Manila: |style="padding:0px 5px" | No provinces |}
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