Barangay San Isidro

Situated in Botolan, Zambales, Barangay San Isidro is one of 31 barangays that make up the municipality within Central Luzon.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay San Isidro had a population of 1,802. This made it the 12th largest of 31 barangays in Botolan by population, placing it in the middle tier of the municipality. Residents of Barangay San Isidro accounted for approximately 2.70% of the total population of Botolan, which stood at 66,739 in the same census year.

Census comparisons between 2015 and 2020 show Barangay San Isidro moving from 1,533 residents to 1,802 residents, an intercensal change of +17.5%. The trajectory indicates a growing community. The Philippine Statistics Authority classifies Barangay San Isidro as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Botolan is a municipality comprising 31 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 Zambales, which contains 247 barangays across its component cities and municipalities, Barangay San Isidro ranks 127th by 2020 population. Zambales is classified as a 2nd 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.