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Northern Samar is subdivided into 24 municipalities.
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|- |style="padding:0px 5px" align="right"|Western Visayas: |style="padding:0px 5px" | Aklan | Antique | Capiz | Iloilo | Guimaras | Negros Occidental |- |style="padding:0px 5px" align="right"|Central Visayas: |style="padding:0px 5px" | Bohol | Cebu | Negros Oriental | Siquijor |- |style="padding:0px 5px" align="right"|Eastern Visayas: |style="padding:0px 5px" | Biliran | Eastern Samar | Leyte | Northern Samar | Samar | Southern Leyte |}
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