Barangay San Agustin

Situated in Gandara, Samar, Barangay San Agustin is one of 69 barangays that make up the municipality within Eastern Visayas.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Agustin had a population of 1,296. This made it the 4th largest of 69 barangays in Gandara by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Agustin accounted for approximately 3.68% of the total population of Gandara, which stood at 35,242 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Agustin moving from 1,185 residents to 1,296 residents, an intercensal change of +9.4%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay San Agustin as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Gandara is a municipality comprising 69 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 Samar, which contains 951 barangays across its component cities and municipalities, Barangay San Agustin ranks 159th by 2020 population. Samar 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.