Barangay San Francisco Sur

Barangay San Francisco Sur forms part of Sudipen, 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 San Francisco Sur had a population of 821. This made it the 14th largest of 17 barangays in Sudipen by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Francisco Sur accounted for approximately 4.78% of the total population of Sudipen, which stood at 17,187 in the same census year.

The barangay recorded 847 residents in the 2015 intercensal count and 821 residents in the 2020 Census — a net change of -3.1%, consistent with a contracting settlement. The Philippine Statistics Authority classifies Barangay San Francisco Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Sudipen is a municipality comprising 17 barangays, and serves as the governing unit directly responsible for local services in Barangay San Francisco 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 San Francisco Sur ranks 433rd 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.

Barangay San Francisco 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.