Barangay Santo Tomas

Situated in Saguday, Quirino, Barangay Santo Tomas is one of 9 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Santo Tomas had a population of 1,469. This made it the 5th largest of 9 barangays in Saguday by population, placing it in the middle tier of the municipality. Residents of Barangay Santo Tomas accounted for approximately 8.57% of the total population of Saguday, which stood at 17,137 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Santo Tomas changed from 1,328 to 1,469, a shift of +10.6% over the five-year period. This places the barangay among those with growing populations in Saguday. The Philippine Statistics Authority classifies Barangay Santo Tomas as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Saguday is a municipality comprising 9 barangays, and serves as the governing unit directly responsible for local services in Barangay Santo Tomas, including public health, sanitation, peace and order, and civil registration. Within the wider province of Quirino, which contains 132 barangays across its component cities and municipalities, Barangay Santo Tomas ranks 57th by 2020 population. Quirino is classified as a 3rd 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.