Barangay Poblacion Sur

Barangay Poblacion Sur forms part of Santa Barbara, a municipality in Pangasinan, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Poblacion Sur had a population of 1,766. This made it the 25th largest of 29 barangays in Santa Barbara by population, placing it among the smaller barangays of the municipality. Residents of Barangay Poblacion Sur accounted for approximately 1.92% of the total population of Santa Barbara, which stood at 92,187 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Poblacion Sur changed from 1,905 to 1,766, a shift of -7.3% over the five-year period. This places the barangay among those with contracting populations in Santa Barbara. The Philippine Statistics Authority classifies Barangay Poblacion Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Barbara is a municipality comprising 29 barangays, and serves as the governing unit directly responsible for local services in Barangay Poblacion Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of Pangasinan, which contains 1,364 barangays across its component cities and municipalities, Barangay Poblacion Sur ranks 748th by 2020 population. Pangasinan is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.