Barangay San Isidro Ilaya

Situated in Buenavista, Quezon, Barangay San Isidro Ilaya is one of 37 barangays that make up the municipality within CALABARZON.

According to the 2020 Philippine census, Barangay San Isidro Ilaya had a population of 415. This made it the 33rd largest of 37 barangays in Buenavista by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Isidro Ilaya accounted for approximately 1.33% of the total population of Buenavista, which stood at 31,160 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Isidro Ilaya moving from 398 residents to 415 residents, an intercensal change of +4.3%. The trajectory indicates a growing community. Barangay San Isidro Ilaya is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Buenavista is a municipality comprising 37 barangays, and serves as the governing unit directly responsible for local services in Barangay San Isidro Ilaya, 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 Ilaya ranks 1002nd 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.

Barangay San Isidro Ilaya is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.