Barangay San Antonio (Pob.)

Barangay San Antonio (Pob.) is a mid-sized barangay in the municipality of Alicia, located in the province of Isabela, in the Cagayan Valley region of the Philippines.

According to the 2020 Philippine census, Barangay San Antonio (Pob.) had a population of 2,086. This made it the 16th largest of 34 barangays in Alicia by population, placing it in the middle tier of the municipality. Residents of Barangay San Antonio (Pob.) accounted for approximately 2.82% of the total population of Alicia, which stood at 73,874 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Antonio (Pob.) moving from 2,100 residents to 2,086 residents, an intercensal change of -0.7%. The trajectory indicates a broadly stable community. Barangay San Antonio (Pob.) is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Alicia is a municipality comprising 34 barangays, and serves as the governing unit directly responsible for local services in Barangay San Antonio (Pob.), including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay San Antonio (Pob.) ranks 249th by 2020 population. Isabela 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.