Barangay San Agustin

Barangay San Agustin is a mid-sized barangay in the City of Sto. Tomas, located in the province of Batangas, in the CALABARZON region of the Philippines.

According to the 2020 Philippine census, Barangay San Agustin had a population of 2,311. This made it the 28th largest of 30 barangays in City of Sto. Tomas by population, placing it among the smaller barangays of the city. Residents of Barangay San Agustin accounted for approximately 1.06% of the total population of City of Sto. Tomas, which stood at 218,500 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Agustin moving from 2,400 residents to 2,311 residents, an intercensal change of -3.7%. The trajectory indicates a contracting community. Barangay San Agustin is officially classified as urban, reflecting the density and built-up character of the area.

City of Sto. Tomas is a city comprising 30 barangays, and serves as the governing unit directly responsible for local services in Barangay San Agustin, 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 San Agustin ranks 444th 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.

Like every Philippine barangay, Barangay San Agustin 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.