Barangay San Marcos

Barangay San Marcos is a mid-sized barangay in the City of San Pablo, located in the province of Laguna, in the CALABARZON region of the Philippines.

According to the 2020 Philippine census, Barangay San Marcos had a population of 2,756. This made it the 45th largest of 80 barangays in City of San Pablo by population, placing it in the middle tier of the city. Residents of Barangay San Marcos accounted for approximately 0.97% of the total population of City of San Pablo, which stood at 285,348 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Marcos moving from 2,990 residents to 2,756 residents, an intercensal change of -7.8%. The trajectory indicates a contracting community. Barangay San Marcos is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

City of San Pablo is a city comprising 80 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 Laguna, which contains 681 barangays across its component cities and municipalities, Barangay San Marcos ranks 305th by 2020 population. Laguna is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.