Barangay San Agustin

Classified as a large barangay, Barangay San Agustin is one of the administrative divisions of Pili in Camarines Sur, Bicol Region, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Agustin had a population of 5,722. This made it the 5th largest of 26 barangays in Pili by population, placing it in the upper half of the municipality. Residents of Barangay San Agustin accounted for approximately 5.77% of the total population of Pili, which stood at 99,196 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Agustin moving from 4,827 residents to 5,722 residents, an intercensal change of +18.5%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay San Agustin as urban, reflecting the density and built-up character of the area.

Pili is a municipality comprising 26 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 Camarines Sur, which contains 1,063 barangays across its component cities and municipalities, Barangay San Agustin ranks 39th by 2020 population. Camarines Sur 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.