Barangay San Julian Central

Barangay San Julian Central forms part of Agoo, 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 Julian Central had a population of 610. This made it the 47th largest of 49 barangays in Agoo by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Julian Central accounted for approximately 0.92% of the total population of Agoo, which stood at 66,028 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Julian Central changed from 619 to 610, a shift of -1.5% over the five-year period. This places the barangay among those with broadly stable populations in Agoo. The Philippine Statistics Authority classifies Barangay San Julian Central as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Agoo is a municipality comprising 49 barangays, and serves as the governing unit directly responsible for local services in Barangay San Julian Central, 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 Julian Central ranks 496th 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 San Julian Central 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.