Barangay San Isidro

Classified as a mid-sized barangay, Barangay San Isidro is one of the administrative divisions of City of San Pablo in Laguna, CALABARZON, Philippines.

According to the 2020 Philippine census, Barangay San Isidro had a population of 4,262. This made it the 24th largest of 80 barangays in City of San Pablo by population, placing it in the upper half of the city. Residents of Barangay San Isidro accounted for approximately 1.49% of the total population of City of San Pablo, which stood at 285,348 in the same census year.

The barangay recorded 3,726 residents in the 2015 intercensal count and 4,262 residents in the 2020 Census — a net change of +14.4%, 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.

City of San Pablo is a city comprising 80 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 Laguna, which contains 681 barangays across its component cities and municipalities, Barangay San Isidro ranks 205th by 2020 population. Laguna 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.