Barangay San Esteban

Barangay San Esteban forms part of San Antonio, a municipality in Zambales, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Esteban had a population of 1,671. This made it the 10th largest of 14 barangays in San Antonio by population, placing it in the middle tier of the municipality. Residents of Barangay San Esteban accounted for approximately 4.46% of the total population of San Antonio, which stood at 37,450 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Esteban moving from 1,525 residents to 1,671 residents, an intercensal change of +9.6%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay San Esteban as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Antonio is a municipality comprising 14 barangays, and serves as the governing unit directly responsible for local services in Barangay San Esteban, including public health, sanitation, peace and order, and civil registration. Within the wider province of Zambales, which contains 247 barangays across its component cities and municipalities, Barangay San Esteban ranks 138th by 2020 population. Zambales is classified as a 2nd 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.