Barangay San Agustin

Barangay San Agustin forms part of City of Iriga, a city in Camarines Sur, and is classified as a large barangay.

According to the 2020 Philippine census, Barangay San Agustin had a population of 6,805. This made it the 3rd largest of 36 barangays in City of Iriga by population, placing it among the most populous barangays of the city. Residents of Barangay San Agustin accounted for approximately 5.95% of the total population of City of Iriga, which stood at 114,457 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Agustin changed from 6,403 to 6,805, a shift of +6.3% over the five-year period. This places the barangay among those with growing populations in City of Iriga. Barangay San Agustin is officially classified as urban, reflecting the density and built-up character of the area.

City of Iriga is a city comprising 36 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 24th 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.