Barangay Santor

Classified as a small barangay, Barangay Santor is one of the administrative divisions of Reina Mercedes in Isabela, Cagayan Valley, Philippines.

According to the 2020 Philippine census, Barangay Santor had a population of 1,461. This made it the 6th largest of 20 barangays in Reina Mercedes by population, placing it in the upper half of the municipality. Residents of Barangay Santor accounted for approximately 5.24% of the total population of Reina Mercedes, which stood at 27,900 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Santor changed from 1,401 to 1,461, a shift of +4.3% over the five-year period. This places the barangay among those with growing populations in Reina Mercedes. Barangay Santor is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Reina Mercedes is a municipality comprising 20 barangays, and serves as the governing unit directly responsible for local services in Barangay Santor, 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 Santor ranks 435th 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 Santor 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.