Barangay San Isidro (Pob.)

Classified as a small barangay, Barangay San Isidro (Pob.) is one of the administrative divisions of Sampaloc in Quezon, CALABARZON, Philippines.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Isidro (Pob.) had a population of 1,743. This made it the 3rd largest of 14 barangays in Sampaloc by population, placing it in the upper half of the municipality. Residents of Barangay San Isidro (Pob.) accounted for approximately 12.79% of the total population of Sampaloc, which stood at 13,629 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Isidro (Pob.) moving from 2,061 residents to 1,743 residents, an intercensal change of -15.4%. The trajectory indicates a contracting community. The Philippine Statistics Authority classifies Barangay San Isidro (Pob.) as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Sampaloc is a municipality comprising 14 barangays, and serves as the governing unit directly responsible for local services in Barangay San Isidro (Pob.), including public health, sanitation, peace and order, and civil registration. Within the wider province of Quezon, which contains 1,242 barangays across its component cities and municipalities, Barangay San Isidro (Pob.) ranks 368th by 2020 population. Quezon 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.