Barangay Pambilan Sur

Barangay Pambilan Sur forms part of Alabat, a municipality in Quezon, and is classified as a very small barangay.

According to the 2020 Philippine census, Barangay Pambilan Sur had a population of 319. This made it the 19th largest of 19 barangays in Alabat by population, placing it among the smaller barangays of the municipality. Residents of Barangay Pambilan Sur accounted for approximately 2.00% of the total population of Alabat, which stood at 15,936 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Pambilan Sur changed from 324 to 319, a shift of -1.5% over the five-year period. This places the barangay among those with broadly stable populations in Alabat. Barangay Pambilan Sur is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Alabat is a municipality comprising 19 barangays, and serves as the governing unit directly responsible for local services in Barangay Pambilan Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of Quezon, which contains 1,242 barangays across its component cities and municipalities, Barangay Pambilan Sur ranks 1068th by 2020 population. Quezon is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Pambilan 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.