Barangay Nagsabaran Sur

Barangay Nagsabaran Sur forms part of Balaoan, a municipality in La Union, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Nagsabaran Sur had a population of 1,219. This made it the 13th largest of 36 barangays in Balaoan by population, placing it in the middle tier of the municipality. Residents of Barangay Nagsabaran Sur accounted for approximately 3.02% of the total population of Balaoan, which stood at 40,339 in the same census year.

The barangay recorded 1,144 residents in the 2015 intercensal count and 1,219 residents in the 2020 Census — a net change of +6.6%, consistent with a growing settlement. The Philippine Statistics Authority classifies Barangay Nagsabaran Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Balaoan is a municipality comprising 36 barangays, and serves as the governing unit directly responsible for local services in Barangay Nagsabaran Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of La Union, which contains 576 barangays across its component cities and municipalities, Barangay Nagsabaran Sur ranks 269th by 2020 population. La Union 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.