Barangay Ilocanos Sur

Barangay Ilocanos Sur forms part of City of San Fernando, a city in La Union, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Ilocanos Sur had a population of 2,665. This made it the 15th largest of 59 barangays in City of San Fernando by population, placing it in the upper half of the city. Residents of Barangay Ilocanos Sur accounted for approximately 2.12% of the total population of City of San Fernando, which stood at 125,640 in the same census year.

The barangay recorded 2,755 residents in the 2015 intercensal count and 2,665 residents in the 2020 Census — a net change of -3.3%, consistent with a contracting settlement. The Philippine Statistics Authority classifies Barangay Ilocanos Sur as urban, reflecting the density and built-up character of the area.

City of San Fernando is a city comprising 59 barangays, and serves as the governing unit directly responsible for local services in Barangay Ilocanos 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 Ilocanos Sur ranks 56th 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 Ilocanos 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.