Barangay Pantar Sur

Classified as a small barangay, Barangay Pantar Sur is one of the administrative divisions of Balaoan in La Union, Ilocos Region, Philippines.

According to the 2020 Philippine census, Barangay Pantar Sur had a population of 1,043. This made it the 18th largest of 36 barangays in Balaoan by population, placing it in the middle tier of the municipality. Residents of Barangay Pantar Sur accounted for approximately 2.59% of the total population of Balaoan, which stood at 40,339 in the same census year.

The barangay recorded 915 residents in the 2015 intercensal count and 1,043 residents in the 2020 Census — a net change of +14.0%, consistent with a growing settlement. Barangay Pantar Sur is officially classified 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 Pantar 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 Pantar Sur ranks 337th 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.