Barangay Bacareña

Barangay Bacareña forms part of San Mateo, a municipality in Isabela, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Bacareña had a population of 945. This made it the 30th largest of 33 barangays in San Mateo by population, placing it among the smaller barangays of the municipality. Residents of Barangay Bacareña accounted for approximately 1.42% of the total population of San Mateo, which stood at 66,663 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Bacareña moving from 926 residents to 945 residents, an intercensal change of +2.1%. The trajectory indicates a growing community. Barangay Bacareña is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Mateo is a municipality comprising 33 barangays, and serves as the governing unit directly responsible for local services in Barangay Bacareña, 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 Bacareña ranks 680th 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 Bacareña 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.