Barangay Maasim

Classified as a mid-sized barangay, Barangay Maasim is one of the administrative divisions of San Ildefonso in Bulacan, Central Luzon, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Maasim had a population of 3,693. This made it the 12th largest of 36 barangays in San Ildefonso by population, placing it in the middle tier of the municipality. Residents of Barangay Maasim accounted for approximately 3.19% of the total population of San Ildefonso, which stood at 115,713 in the same census year.

The barangay recorded 3,774 residents in the 2015 intercensal count and 3,693 residents in the 2020 Census — a net change of -2.1%, consistent with a contracting settlement. The Philippine Statistics Authority classifies Barangay Maasim as urban, reflecting the density and built-up character of the area.

San Ildefonso is a municipality comprising 36 barangays, and serves as the governing unit directly responsible for local services in Barangay Maasim, including public health, sanitation, peace and order, and civil registration. Within the wider province of Bulacan, which contains 569 barangays across its component cities and municipalities, Barangay Maasim ranks 324th by 2020 population. Bulacan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay Maasim is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.