Barangay San Antonio

Situated in Narvacan, Ilocos Sur, Barangay San Antonio is one of 34 barangays that make up the municipality within Ilocos Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Antonio had a population of 1,934. This made it the 8th largest of 34 barangays in Narvacan by population, placing it in the upper half of the municipality. Residents of Barangay San Antonio accounted for approximately 4.18% of the total population of Narvacan, which stood at 46,234 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Antonio moving from 1,866 residents to 1,934 residents, an intercensal change of +3.6%. The trajectory indicates a growing community. 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.

Narvacan is a municipality comprising 34 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 Ilocos Sur, which contains 768 barangays across its component cities and municipalities, Barangay San Antonio ranks 61st by 2020 population. Ilocos Sur is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Like every Philippine barangay, Barangay San Antonio is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.