Barangay San Lucas (Pob.)

Situated in Magsingal, Ilocos Sur, Barangay San Lucas (Pob.) is one of 30 barangays that make up the municipality within Ilocos Region.

According to the 2020 Philippine census, Barangay San Lucas (Pob.) had a population of 664. This made it the 23rd largest of 30 barangays in Magsingal by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Lucas (Pob.) accounted for approximately 2.12% of the total population of Magsingal, which stood at 31,308 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Lucas (Pob.) changed from 670 to 664, a shift of -0.9% over the five-year period. This places the barangay among those with broadly stable populations in Magsingal. Barangay San Lucas (Pob.) is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Magsingal is a municipality comprising 30 barangays, and serves as the governing unit directly responsible for local services in Barangay San Lucas (Pob.), including public health, sanitation, peace and order, and civil registration. Within the wider province of Ilocos Sur, which contains 768 barangays across its component cities and municipalities, Barangay San Lucas (Pob.) ranks 456th by 2020 population. Ilocos Sur 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 Lucas (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.