Barangay San Isidro Silangan

Barangay San Isidro Silangan forms part of Gumaca, a municipality in Quezon, and is classified as a very small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Isidro Silangan had a population of 102. This made it the 59th largest of 59 barangays in Gumaca by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Isidro Silangan accounted for approximately 0.14% of the total population of Gumaca, which stood at 71,942 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Isidro Silangan changed from 252 to 102, a shift of -59.5% over the five-year period. This places the barangay among those with contracting populations in Gumaca. The Philippine Statistics Authority classifies Barangay San Isidro Silangan as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Gumaca is a municipality comprising 59 barangays, and serves as the governing unit directly responsible for local services in Barangay San Isidro Silangan, 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 Silangan ranks 1206th 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.

Like every Philippine barangay, Barangay San Isidro Silangan is led by an elected Punong Barangay (barangay captain) supported by seven Sangguniang Barangay members (kagawads), an SK Chairperson, a Barangay Secretary, and a Barangay Treasurer. The next Barangay and Sangguniang Kabataan Elections (BSKE) are scheduled for Monday, November 2, 2026, with officials serving four-year terms under Republic Act No. 12232.