Barangay Poblacion Sur

Classified as a small barangay, Barangay Poblacion Sur is one of the administrative divisions of Santa Cruz in Ilocos Sur, Ilocos Region, Philippines.

According to the 2020 Philippine census, Barangay Poblacion Sur had a population of 687. This made it the 26th largest of 49 barangays in Santa Cruz by population, placing it in the middle tier of the municipality. Residents of Barangay Poblacion Sur accounted for approximately 1.66% of the total population of Santa Cruz, which stood at 41,366 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Poblacion Sur moving from 603 residents to 687 residents, an intercensal change of +13.9%. The trajectory indicates a growing community. Barangay Poblacion Sur is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Cruz is a municipality comprising 49 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 439th 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.