Barangay San Basilio (Pob.)

Barangay San Basilio (Pob.) forms part of Magsingal, a municipality in Ilocos Sur, and is classified as a very small barangay.

According to the 2020 Philippine census, Barangay San Basilio (Pob.) had a population of 437. This made it the 29th largest of 30 barangays in Magsingal by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Basilio (Pob.) accounted for approximately 1.40% of the total population of Magsingal, which stood at 31,308 in the same census year.

The barangay recorded 536 residents in the 2015 intercensal count and 437 residents in the 2020 Census — a net change of -18.5%, consistent with a contracting settlement. Barangay San Basilio (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 Basilio (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 Basilio (Pob.) ranks 629th 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 Basilio (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.