Barangay San Antonio

Situated in Naujan, Oriental Mindoro, Barangay San Antonio is one of 70 barangays that make up the municipality within MIMAROPA Region.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Antonio had a population of 490. This made it the 67th largest of 70 barangays in Naujan by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Antonio accounted for approximately 0.45% of the total population of Naujan, which stood at 109,587 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Antonio moving from 529 residents to 490 residents, an intercensal change of -7.4%. The trajectory indicates a contracting community. The Philippine Statistics Authority classifies Barangay San Antonio as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Naujan is a municipality comprising 70 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 418th 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.

Barangay San Antonio is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.