Barangay Poblacion 3

Barangay Poblacion 3 forms part of Santa Maria, a municipality in Isabela, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Poblacion 3 had a population of 2,187. This made it the 2nd largest of 20 barangays in Santa Maria by population, placing it among the most populous barangays of the municipality. Residents of Barangay Poblacion 3 accounted for approximately 8.49% of the total population of Santa Maria, which stood at 25,758 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Poblacion 3 moving from 2,144 residents to 2,187 residents, an intercensal change of +2.0%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay Poblacion 3 as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santa Maria is a municipality comprising 20 barangays, and serves as the governing unit directly responsible for local services in Barangay Poblacion 3, 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 Poblacion 3 ranks 229th 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.

Like every Philippine barangay, Barangay Poblacion 3 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.