Barangay Bulawan Sr.

Barangay Bulawan Sr. forms part of Lupi, a municipality in Camarines Sur, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Bulawan Sr. had a population of 1,868. This made it the 4th largest of 38 barangays in Lupi by population, placing it among the most populous barangays of the municipality. Residents of Barangay Bulawan Sr. accounted for approximately 5.51% of the total population of Lupi, which stood at 33,897 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Bulawan Sr. moving from 1,624 residents to 1,868 residents, an intercensal change of +15.0%. The trajectory indicates a growing community. Barangay Bulawan Sr. is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Lupi is a municipality comprising 38 barangays, and serves as the governing unit directly responsible for local services in Barangay Bulawan Sr., 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 Bulawan Sr. ranks 386th 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 Bulawan Sr. 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.