Barangay San Antonio

Situated in City of San Pedro, Laguna, Barangay San Antonio is one of 27 barangays that make up the city within CALABARZON.

According to the 2020 Philippine census, Barangay San Antonio had a population of 59,368. This made it the 1st largest of 27 barangays in City of San Pedro by population, placing it among the most populous barangays of the city. Residents of Barangay San Antonio accounted for approximately 18.21% of the total population of City of San Pedro, which stood at 326,001 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Antonio moving from 61,428 residents to 59,368 residents, an intercensal change of -3.4%. The trajectory indicates a contracting community. Barangay San Antonio is officially classified as urban, reflecting the density and built-up character of the area.

City of San Pedro is a city comprising 27 barangays, and serves as the governing unit directly responsible for local services in Barangay San Antonio, 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 Antonio ranks 3rd 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.