Barangay San Antonio

Barangay San Antonio forms part of Gloria, a municipality in Oriental Mindoro, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay San Antonio had a population of 1,667. This made it the 12th largest of 27 barangays in Gloria by population, placing it in the middle tier of the municipality. Residents of Barangay San Antonio accounted for approximately 3.30% of the total population of Gloria, which stood at 50,496 in the same census year.

The barangay recorded 1,330 residents in the 2015 intercensal count and 1,667 residents in the 2020 Census — a net change of +25.3%, consistent with a growing settlement. Barangay San Antonio is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Gloria is a municipality comprising 27 barangays, and serves as the governing unit directly responsible for local services in Barangay San Antonio, including public health, sanitation, peace and order, and civil registration. Within the wider province of Oriental Mindoro, which contains 426 barangays across its component cities and municipalities, Barangay San Antonio ranks 228th by 2020 population. Oriental Mindoro 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.