Barangay San Isidro

Barangay San Isidro is a mid-sized barangay in the municipality of Libmanan, located in the province of Camarines Sur, in the Bicol Region region of the Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Isidro had a population of 4,000. This made it the 3rd largest of 75 barangays in Libmanan by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Isidro accounted for approximately 3.54% of the total population of Libmanan, which stood at 112,994 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Isidro moving from 3,447 residents to 4,000 residents, an intercensal change of +16.0%. The trajectory indicates a growing 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.

Libmanan is a municipality comprising 75 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 Camarines Sur, which contains 1,063 barangays across its component cities and municipalities, Barangay San Isidro ranks 91st by 2020 population. Camarines Sur 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.