Barangay San Isidro

Classified as a small barangay, Barangay San Isidro is one of the administrative divisions of Naujan in Oriental Mindoro, MIMAROPA Region, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Isidro had a population of 956. This made it the 53rd largest of 70 barangays in Naujan by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Isidro accounted for approximately 0.87% 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 Isidro moving from 964 residents to 956 residents, an intercensal change of -0.8%. The trajectory indicates a broadly stable community. The Philippine Statistics Authority classifies Barangay San Isidro 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 Isidro, 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 Isidro ranks 354th 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 Isidro 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.