Barangay Santo Tomas

Barangay Santo Tomas forms part of Agoncillo, a municipality in Batangas, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Santo Tomas had a population of 803. This made it the 18th largest of 21 barangays in Agoncillo by population, placing it among the smaller barangays of the municipality. Residents of Barangay Santo Tomas accounted for approximately 2.05% of the total population of Agoncillo, which stood at 39,101 in the same census year.

The barangay recorded 728 residents in the 2015 intercensal count and 803 residents in the 2020 Census — a net change of +10.3%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay Santo Tomas as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Agoncillo is a municipality comprising 21 barangays, and serves as the governing unit directly responsible for local services in Barangay Santo Tomas, including public health, sanitation, peace and order, and civil registration. Within the wider province of Batangas, which contains 1,078 barangays across its component cities and municipalities, Barangay Santo Tomas ranks 930th by 2020 population. Batangas is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Santo Tomas is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.