Barangay Poblacion Sur

Situated in Santa Maria, Ilocos Sur, Barangay Poblacion Sur is one of 33 barangays that make up the municipality within Ilocos Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Poblacion Sur had a population of 2,177. This made it the 1st largest of 33 barangays in Santa Maria by population, placing it among the most populous barangays of the municipality. Residents of Barangay Poblacion Sur accounted for approximately 7.26% of the total population of Santa Maria, which stood at 30,006 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Poblacion Sur changed from 2,028 to 2,177, a shift of +7.3% over the five-year period. This places the barangay among those with growing populations in Santa Maria. The Philippine Statistics Authority classifies Barangay Poblacion Sur as urban, reflecting the density and built-up character of the area.

Santa Maria is a municipality comprising 33 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 Ilocos Sur, which contains 768 barangays across its component cities and municipalities, Barangay Poblacion Sur ranks 34th by 2020 population. Ilocos Sur is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Poblacion 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.