The province of Ilocos Norte has 559 barangays comprising its 21 municipalities and 2 cities.[1][2]
- ^ "2010 Census of Population and Housing: Total Population by Province, City, Municipality and Barangay:as of May 1, 2010" (PDF). National Statistics Office. Archived from the original (PDF) on 23 October 2014. Retrieved 18 October 2014.
- ^ "Province: Abra". Philippine Statistics Authority - National Statistical Coordination Board. Retrieved 30 December 2014.
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