Barangay San Agustin East

Classified as a mid-sized barangay, Barangay San Agustin East is one of the administrative divisions of Agoo in La Union, Ilocos Region, Philippines.

According to the 2020 Philippine census, Barangay San Agustin East had a population of 2,479. This made it the 2nd largest of 49 barangays in Agoo by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Agustin East accounted for approximately 3.75% of the total population of Agoo, which stood at 66,028 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Agustin East moving from 2,387 residents to 2,479 residents, an intercensal change of +3.9%. The trajectory indicates a growing community. Barangay San Agustin East is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Agoo is a municipality comprising 49 barangays, and serves as the governing unit directly responsible for local services in Barangay San Agustin East, including public health, sanitation, peace and order, and civil registration. Within the wider province of La Union, which contains 576 barangays across its component cities and municipalities, Barangay San Agustin East ranks 63rd by 2020 population. La Union 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 East 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.