Barangay Calinaoan Centro

Situated in Santo Tomas, Isabela, Barangay Calinaoan Centro is one of 27 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Philippine census, Barangay Calinaoan Centro had a population of 703. This made it the 16th largest of 27 barangays in Santo Tomas by population, placing it in the middle tier of the municipality. Residents of Barangay Calinaoan Centro accounted for approximately 2.87% 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 Calinaoan Centro changed from 703 to 703, a shift of 0.0% over the five-year period. This places the barangay among those with broadly stable populations in Santo Tomas. Barangay Calinaoan Centro 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 Calinaoan Centro, 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 Calinaoan Centro ranks 823rd 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.