Barangay San Isidro

Situated in Palanan, Isabela, Barangay San Isidro is one of 17 barangays that make up the municipality within Cagayan Valley.

According to the 2020 Philippine census, Barangay San Isidro had a population of 864. This made it the 12th largest of 17 barangays in Palanan by population, placing it in the middle tier of the municipality. Residents of Barangay San Isidro accounted for approximately 4.89% of the total population of Palanan, which stood at 17,684 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Isidro moving from 800 residents to 864 residents, an intercensal change of +8.0%. The trajectory indicates a growing community. Barangay San Isidro is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Palanan is a municipality comprising 17 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 Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay San Isidro ranks 730th by 2020 population. Isabela 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.