Barangay San Agustin

Barangay San Agustin is a small barangay in the municipality of Abulug, located in the province of Cagayan, in the Cagayan Valley region of the Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Agustin had a population of 864. This made it the 18th largest of 20 barangays in Abulug by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Agustin accounted for approximately 2.50% of the total population of Abulug, which stood at 34,579 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Agustin moving from 811 residents to 864 residents, an intercensal change of +6.5%. 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.

Abulug is a municipality comprising 20 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 Cagayan, which contains 820 barangays across its component cities and municipalities, Barangay San Agustin ranks 577th by 2020 population. Cagayan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay San Agustin is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.