Barangay Balagasan

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

According to the 2020 Philippine census, Barangay Balagasan had a population of 788. This made it the 28th largest of 61 barangays in Boac by population, placing it in the middle tier of the municipality. Residents of Barangay Balagasan accounted for approximately 1.38% of the total population of Boac, which stood at 57,283 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Balagasan moving from 752 residents to 788 residents, an intercensal change of +4.8%. The trajectory indicates a growing community. Barangay Balagasan is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Boac is a municipality comprising 61 barangays, and serves as the governing unit directly responsible for local services in Barangay Balagasan, 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 Balagasan ranks 127th 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 Balagasan 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.