Barangay San Agustin

Barangay San Agustin is a mid-sized barangay in the municipality of San Manuel, located in the province of Tarlac, in the Central Luzon region of the Philippines.

According to the 2020 Philippine census, Barangay San Agustin had a population of 2,238. This made it the 6th largest of 15 barangays in San Manuel by population, placing it in the middle tier of the municipality. Residents of Barangay San Agustin accounted for approximately 7.88% of the total population of San Manuel, which stood at 28,387 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Agustin moving from 1,896 residents to 2,238 residents, an intercensal change of +18.0%. The trajectory indicates a growing community. Barangay San Agustin is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Manuel is a municipality comprising 15 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 Tarlac, which contains 511 barangays across its component cities and municipalities, Barangay San Agustin ranks 235th by 2020 population. Tarlac 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.