Barangay San Antonio

Classified as a mid-sized barangay, Barangay San Antonio is one of the administrative divisions of Luisiana in Laguna, CALABARZON, Philippines.

According to the 2020 Philippine census, Barangay San Antonio had a population of 3,289. This made it the 1st largest of 23 barangays in Luisiana by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Antonio accounted for approximately 15.77% of the total population of Luisiana, which stood at 20,859 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Antonio moving from 3,093 residents to 3,289 residents, an intercensal change of +6.3%. The trajectory indicates a growing community. Barangay San Antonio is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Luisiana is a municipality comprising 23 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 260th 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.

Barangay San Antonio 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.