Barangay San Agustin

Barangay San Agustin forms part of Paoay, a municipality in Ilocos Norte, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay San Agustin had a population of 1,029. This made it the 9th largest of 31 barangays in Paoay by population, placing it in the upper half of the municipality. Residents of Barangay San Agustin accounted for approximately 4.12% of the total population of Paoay, which stood at 25,001 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Agustin moving from 1,008 residents to 1,029 residents, an intercensal change of +2.1%. 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.

Paoay is a municipality comprising 31 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 Ilocos Norte, which contains 559 barangays across its component cities and municipalities, Barangay San Agustin ranks 257th by 2020 population. Ilocos Norte 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.