Barangay Ilag

Situated in San Teodoro, Oriental Mindoro, Barangay Ilag is one of 8 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 Ilag had a population of 1,686. This made it the 7th largest of 8 barangays in San Teodoro by population, placing it among the smaller barangays of the municipality. Residents of Barangay Ilag accounted for approximately 8.82% of the total population of San Teodoro, which stood at 19,121 in the same census year.

Census comparisons between 2015 and 2020 show Barangay Ilag moving from 1,800 residents to 1,686 residents, an intercensal change of -6.3%. The trajectory indicates a contracting community. The Philippine Statistics Authority classifies Barangay Ilag as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

San Teodoro is a municipality comprising 8 barangays, and serves as the governing unit directly responsible for local services in Barangay Ilag, 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 Ilag ranks 221st 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.