Barangay San Nicolas Central (Pob.)

Situated in Agoo, La Union, Barangay San Nicolas Central (Pob.) is one of 49 barangays that make up the municipality within Ilocos Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Nicolas Central (Pob.) had a population of 851. This made it the 40th largest of 49 barangays in Agoo by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Nicolas Central (Pob.) accounted for approximately 1.29% of the total population of Agoo, which stood at 66,028 in the same census year.

The barangay recorded 1,177 residents in the 2015 intercensal count and 851 residents in the 2020 Census — a net change of -27.7%, consistent with a contracting settlement. The Philippine Statistics Authority classifies Barangay San Nicolas Central (Pob.) 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 Nicolas Central (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 San Nicolas Central (Pob.) ranks 424th 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 Nicolas Central (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.