Barangay Bucal Sur

Situated in Dinapigue, Isabela, Barangay Bucal Sur is one of 6 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Bucal Sur had a population of 861. This made it the 3rd largest of 6 barangays in Dinapigue by population, placing it in the middle tier of the municipality. Residents of Barangay Bucal Sur accounted for approximately 14.79% of the total population of Dinapigue, which stood at 5,821 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Bucal Sur changed from 729 to 861, a shift of +18.1% over the five-year period. This places the barangay among those with growing populations in Dinapigue. The Philippine Statistics Authority classifies Barangay Bucal Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Dinapigue is a municipality comprising 6 barangays, and serves as the governing unit directly responsible for local services in Barangay Bucal Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay Bucal Sur ranks 734th by 2020 population. Isabela is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Bucal Sur 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.