Barangay San Sebastian

Situated in Lagonoy, Camarines Sur, Barangay San Sebastian is one of 38 barangays that make up the municipality within Bicol Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Sebastian had a population of 2,678. This made it the 4th largest of 38 barangays in Lagonoy by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Sebastian accounted for approximately 4.72% of the total population of Lagonoy, which stood at 56,714 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Sebastian moving from 2,545 residents to 2,678 residents, an intercensal change of +5.2%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay San Sebastian as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Lagonoy is a municipality comprising 38 barangays, and serves as the governing unit directly responsible for local services in Barangay San Sebastian, 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 Sebastian ranks 209th 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.

Barangay San Sebastian 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.