Barangay Bangbangalon

Barangay Bangbangalon forms part of Boac, a municipality in Marinduque, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Bangbangalon had a population of 1,462. This made it the 12th largest of 61 barangays in Boac by population, placing it in the upper half of the municipality. Residents of Barangay Bangbangalon accounted for approximately 2.55% of the total population of Boac, which stood at 57,283 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Bangbangalon moving from 1,260 residents to 1,462 residents, an intercensal change of +16.0%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Bangbangalon as urban, reflecting the density and built-up character of the area.

Boac is a municipality comprising 61 barangays, and serves as the governing unit directly responsible for local services in Barangay Bangbangalon, including public health, sanitation, peace and order, and civil registration. Within the wider province of Marinduque, which contains 218 barangays across its component cities and municipalities, Barangay Bangbangalon ranks 54th by 2020 population. Marinduque is classified as a 4th by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Bangbangalon is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.