Barangay San Antonio

Barangay San Antonio forms part of Polanco, a municipality in Zamboanga Del Norte, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Antonio had a population of 1,474. This made it the 13th largest of 30 barangays in Polanco by population, placing it in the middle tier of the municipality. Residents of Barangay San Antonio accounted for approximately 3.49% of the total population of Polanco, which stood at 42,265 in the same census year.

The barangay recorded 1,486 residents in the 2015 intercensal count and 1,474 residents in the 2020 Census — a net change of -0.8%, consistent with a broadly stable settlement. The Philippine Statistics Authority classifies Barangay San Antonio as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Polanco is a municipality comprising 30 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 Zamboanga Del Norte, which contains 691 barangays across its component cities and municipalities, Barangay San Antonio ranks 243rd by 2020 population. Zamboanga Del Norte 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.