Barangay San Pablo (Pob.)

Situated in Castillejos, Zambales, Barangay San Pablo (Pob.) is one of 14 barangays that make up the municipality within Central Luzon.

According to the 2020 Philippine census, Barangay San Pablo (Pob.) had a population of 11,139. This made it the 2nd largest of 14 barangays in Castillejos by population, placing it among the most populous barangays of the municipality. Residents of Barangay San Pablo (Pob.) accounted for approximately 16.41% 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 Pablo (Pob.) changed from 11,579 to 11,139, a shift of -3.8% over the five-year period. This places the barangay among those with contracting populations in Castillejos. Barangay San Pablo (Pob.) is officially classified as urban, reflecting the density and built-up character of the area.

Castillejos is a municipality comprising 14 barangays, and serves as the governing unit directly responsible for local services in Barangay San Pablo (Pob.), 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 Pablo (Pob.) ranks 6th 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.