Barangay Ili Sur (Pob.)

Classified as a mid-sized barangay, Barangay Ili Sur (Pob.) is one of the administrative divisions of San Juan in La Union, Ilocos Region, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Ili Sur (Pob.) had a population of 2,687. This made it the 3rd largest of 41 barangays in San Juan by population, placing it among the most populous barangays of the municipality. Residents of Barangay Ili Sur (Pob.) accounted for approximately 6.63% of the total population of San Juan, which stood at 40,507 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Ili Sur (Pob.) moving from 2,520 residents to 2,687 residents, an intercensal change of +6.6%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Ili Sur (Pob.) as urban, reflecting the density and built-up character of the area.

San Juan is a municipality comprising 41 barangays, and serves as the governing unit directly responsible for local services in Barangay Ili Sur (Pob.), 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 Ili Sur (Pob.) ranks 55th 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.

Like every Philippine barangay, Barangay Ili Sur (Pob.) is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.