Barangay San Agustin

Barangay San Agustin forms part of Sierra Bullones, a municipality in Bohol, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Agustin had a population of 1,164. This made it the 10th largest of 22 barangays in Sierra Bullones by population, placing it in the middle tier of the municipality. Residents of Barangay San Agustin accounted for approximately 4.46% of the total population of Sierra Bullones, which stood at 26,095 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Agustin changed from 1,083 to 1,164, a shift of +7.5% over the five-year period. This places the barangay among those with growing populations in Sierra Bullones. 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.

Sierra Bullones is a municipality comprising 22 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 Bohol, which contains 1,109 barangays across its component cities and municipalities, Barangay San Agustin ranks 409th by 2020 population. Bohol is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.