Barangay Santo Tomas

Barangay Santo Tomas is a large barangay in the municipality of Subic, located in the province of Zambales, in the Central Luzon region of the Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Santo Tomas had a population of 5,427. This made it the 9th largest of 16 barangays in Subic by population, placing it in the middle tier of the municipality. Residents of Barangay Santo Tomas accounted for approximately 4.85% of the total population of Subic, which stood at 111,912 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Santo Tomas moving from 5,481 residents to 5,427 residents, an intercensal change of -1.0%. The trajectory indicates a broadly stable community. The Philippine Statistics Authority classifies Barangay Santo Tomas as urban, reflecting the density and built-up character of the area.

Subic is a municipality comprising 16 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 Zambales, which contains 247 barangays across its component cities and municipalities, Barangay Santo Tomas ranks 24th by 2020 population. Zambales is classified as a 2nd 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.