Barangay San Antonio

Classified as a mid-sized barangay, Barangay San Antonio is one of the administrative divisions of Santo Tomas in Pangasinan, Ilocos Region, Philippines.

According to the 2020 Philippine census, Barangay San Antonio had a population of 4,282. This made it the 1st largest of 10 barangays in Santo Tomas by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Antonio accounted for approximately 28.78% of the total population of Santo Tomas, which stood at 14,878 in the same census year.

The barangay recorded 4,249 residents in the 2015 intercensal count and 4,282 residents in the 2020 Census — a net change of +0.8%, consistent with a slowly expanding settlement. Barangay San Antonio is officially classified as urban, reflecting the density and built-up character of the area.

Santo Tomas is a municipality comprising 10 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 Pangasinan, which contains 1,364 barangays across its component cities and municipalities, Barangay San Antonio ranks 126th by 2020 population. Pangasinan 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.