Barangay San Antonio

Classified as a small barangay, Barangay San Antonio is one of the administrative divisions of Barcelona in Sorsogon, Bicol Region, Philippines.

According to the 2020 Philippine census, Barangay San Antonio had a population of 912. This made it the 9th largest of 25 barangays in Barcelona by population, placing it in the middle tier of the municipality. Residents of Barangay San Antonio accounted for approximately 4.35% of the total population of Barcelona, which stood at 20,987 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Antonio changed from 937 to 912, a shift of -2.7% over the five-year period. This places the barangay among those with contracting populations in Barcelona. Barangay San Antonio is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Barcelona is a municipality comprising 25 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 Sorsogon, which contains 541 barangays across its component cities and municipalities, Barangay San Antonio ranks 357th by 2020 population. Sorsogon is classified as a 2nd 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.