Barangay San Antonio

Barangay San Antonio is a very large barangay in the City of Biñan, located in the province of Laguna, in the CALABARZON region of the Philippines.

According to the 2020 Philippine census, Barangay San Antonio had a population of 36,163. This made it the 4th largest of 24 barangays in City of Biñan by population, placing it in the upper half of the city. Residents of Barangay San Antonio accounted for approximately 8.88% of the total population of City of Biñan, which stood at 407,437 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Antonio changed from 35,811 to 36,163, a shift of +1.0% over the five-year period. This places the barangay among those with slowly expanding populations in City of Biñan. Barangay San Antonio is officially classified as urban, reflecting the density and built-up character of the area.

City of Biñan is a city comprising 24 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 12th 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.