Barangay Santa Lucia (Pob.)

Barangay Santa Lucia (Pob.) forms part of Quirino, a municipality in Isabela, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay Santa Lucia (Pob.) had a population of 2,145. This made it the 3rd largest of 21 barangays in Quirino by population, placing it among the most populous barangays of the municipality. Residents of Barangay Santa Lucia (Pob.) accounted for approximately 8.57% of the total population of Quirino, which stood at 25,023 in the same census year.

The barangay recorded 2,098 residents in the 2015 intercensal count and 2,145 residents in the 2020 Census — a net change of +2.2%, consistent with a growing settlement. Barangay Santa Lucia (Pob.) is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Quirino is a municipality comprising 21 barangays, and serves as the governing unit directly responsible for local services in Barangay Santa Lucia (Pob.), including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay Santa Lucia (Pob.) ranks 238th by 2020 population. Isabela is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

Barangay Santa Lucia (Pob.) is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.