Barangay San Antonio

Situated in Sarrat, Ilocos Norte, Barangay San Antonio is one of 24 barangays that make up the municipality within Ilocos Region.

According to the 2020 Philippine census, Barangay San Antonio had a population of 1,194. This made it the 8th largest of 24 barangays in Sarrat by population, placing it in the upper half of the municipality. Residents of Barangay San Antonio accounted for approximately 4.74% of the total population of Sarrat, which stood at 25,186 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Antonio moving from 1,188 residents to 1,194 residents, an intercensal change of +0.5%. The trajectory indicates a slowly expanding 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.

Sarrat is a municipality comprising 24 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 Norte, which contains 559 barangays across its component cities and municipalities, Barangay San Antonio ranks 182nd by 2020 population. Ilocos Norte 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.