Barangay San Isidro

Barangay San Isidro forms part of Santo Niño, a municipality in South Cotabato, and is classified as a mid-sized barangay.

According to the 2020 Philippine census, Barangay San Isidro had a population of 3,517. This made it the 3rd largest of 10 barangays in Santo Niño by population, placing it in the upper half of the municipality. Residents of Barangay San Isidro accounted for approximately 8.84% of the total population of Santo Niño, which stood at 39,796 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Isidro moving from 3,691 residents to 3,517 residents, an intercensal change of -4.7%. The trajectory indicates a contracting 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.

Santo Niño is a municipality comprising 10 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 South Cotabato, which contains 225 barangays across its component cities and municipalities, Barangay San Isidro ranks 99th by 2020 population. South Cotabato 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 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.