Barangay Busac

Barangay Busac forms part of Oas, a municipality in Albay, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Busac had a population of 2,099. This made it the 5th largest of 53 barangays in Oas by population, placing it among the most populous barangays of the municipality. Residents of Barangay Busac accounted for approximately 3.18% of the total population of Oas, which stood at 66,084 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Busac changed from 2,079 to 2,099, a shift of +1.0% over the five-year period. This places the barangay among those with slowly expanding populations in Oas. The Philippine Statistics Authority classifies Barangay Busac as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Oas is a municipality comprising 53 barangays, and serves as the governing unit directly responsible for local services in Barangay Busac, including public health, sanitation, peace and order, and civil registration. Within the wider province of Albay, which contains 720 barangays across its component cities and municipalities, Barangay Busac ranks 219th by 2020 population. Albay 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 Busac 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.