Barangay Cullalabo Del Sur

Situated in Burgos, Isabela, Barangay Cullalabo Del Sur is one of 14 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 Cullalabo Del Sur had a population of 1,159. This made it the 11th largest of 14 barangays in Burgos by population, placing it among the smaller barangays of the municipality. Residents of Barangay Cullalabo Del Sur accounted for approximately 4.45% of the total population of Burgos, which stood at 26,040 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Cullalabo Del Sur moving from 1,126 residents to 1,159 residents, an intercensal change of +2.9%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Cullalabo Del Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Burgos is a municipality comprising 14 barangays, and serves as the governing unit directly responsible for local services in Barangay Cullalabo Del 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 Cullalabo Del Sur ranks 561st 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 Cullalabo Del 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.