Barangay Calsapa

Barangay Calsapa forms part of San Teodoro, a municipality in Oriental Mindoro, and is classified as a mid-sized barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Calsapa had a population of 2,535. This made it the 4th largest of 8 barangays in San Teodoro by population, placing it in the middle tier of the municipality. Residents of Barangay Calsapa accounted for approximately 13.26% 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 Calsapa moving from 2,506 residents to 2,535 residents, an intercensal change of +1.2%. The trajectory indicates a slowly expanding community. The Philippine Statistics Authority classifies Barangay Calsapa 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 Calsapa, 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 Calsapa ranks 121st 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.