Barangay San Isidro

Barangay San Isidro forms part of Santiago, a municipality in Agusan Del Norte, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay San Isidro had a population of 2,972. This made it the 4th largest of 9 barangays in Santiago by population, placing it in the middle tier of the municipality. Residents of Barangay San Isidro accounted for approximately 10.37% of the total population of Santiago, which stood at 28,657 in the same census year.

The barangay recorded 2,450 residents in the 2015 intercensal count and 2,972 residents in the 2020 Census — a net change of +21.3%, consistent with a growing settlement. Barangay San Isidro is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Santiago is a municipality comprising 9 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 Agusan Del Norte, which contains 253 barangays across its component cities and municipalities, Barangay San Isidro ranks 44th by 2020 population. Agusan Del Norte is classified as a 3rd 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.