Barangay San Marcos

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

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Marcos had a population of 2,671. This made it the 18th largest of 29 barangays in Calumpit by population, placing it in the middle tier of the municipality. Residents of Barangay San Marcos accounted for approximately 2.25% of the total population of Calumpit, which stood at 118,471 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Marcos moving from 2,255 residents to 2,671 residents, an intercensal change of +18.4%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay San Marcos as urban, reflecting the density and built-up character of the area.

Calumpit is a municipality comprising 29 barangays, and serves as the governing unit directly responsible for local services in Barangay San Marcos, 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 San Marcos ranks 414th 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.

Barangay San Marcos 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.