Barangay Bolinao-Culalabo

Barangay Bolinao-Culalabo forms part of Santo Tomas, a municipality in Isabela, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay Bolinao-Culalabo had a population of 1,851. This made it the 3rd largest of 27 barangays in Santo Tomas by population, placing it among the most populous barangays of the municipality. Residents of Barangay Bolinao-Culalabo accounted for approximately 7.55% of the total population of Santo Tomas, which stood at 24,528 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Bolinao-Culalabo changed from 1,612 to 1,851, a shift of +14.8% over the five-year period. This places the barangay among those with growing populations in Santo Tomas. Barangay Bolinao-Culalabo is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santo Tomas is a municipality comprising 27 barangays, and serves as the governing unit directly responsible for local services in Barangay Bolinao-Culalabo, 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 Bolinao-Culalabo ranks 304th 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.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.