Barangay San Roque

Barangay San Roque forms part of Castillejos, a municipality in Zambales, and is classified as a small barangay.

According to the 2020 Philippine census, Barangay San Roque had a population of 1,422. This made it the 12th largest of 14 barangays in Castillejos by population, placing it among the smaller barangays of the municipality. Residents of Barangay San Roque accounted for approximately 2.09% of the total population of Castillejos, which stood at 67,889 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay San Roque changed from 1,571 to 1,422, a shift of -9.5% over the five-year period. This places the barangay among those with contracting populations in Castillejos. Barangay San Roque is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Castillejos is a municipality comprising 14 barangays, and serves as the governing unit directly responsible for local services in Barangay San Roque, 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 Roque ranks 155th 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.

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.