Barangay San Agustin is a local government unit in Castillejos, Zambales, in the Central Luzon region of the Philippines. It had a population of 4,906 as of the 2024 POPCEN.
Under Republic Act 12232, elected barangay officials serve a four-year term. Make sure you are registered and know your polling place before election day.
Primary PHLPost ZIP for Castillejos. In NCR and some large cities, barangays can have different ZIPs. Confirm with PHLPost.
Punong Barangay
Darren Ray Valdez Dalit(2023 - 2026 term)
Next BSKE
November 2, 2026
Barangay San Agustin · Data updated 2026-05-24
About Barangay San Agustin
Classified as a mid-sized barangay, Barangay San Agustin is one of the administrative divisions of Castillejos in Zambales, Central Luzon, Philippines.
According to the 2024 POPCEN (Census of Population) published by the Philippine Statistics Authority, Barangay San Agustin had a population of 4,906. This made it the 5th largest of 14 barangays in Castillejos by population, placing it in the upper half of the municipality. Residents of Barangay San Agustin accounted for approximately 7.00% of the total population of Castillejos, which stood at 70,105 in the same 2024 POPCEN reference period.
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The barangay recorded 4,827 residents in the 2020 Census of Population and Housing and 4,906 residents in the 2024 POPCEN — a net change of +1.6%, consistent with a slowly expanding settlement. Barangay San Agustin 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 Agustin, 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 Agustin ranks 46th by 2024 POPCEN 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.
Compiled from official Philippine Statistics Authority census data and Philippine Standard Geographic Code records. Reviewed and published by the Barangay Directory editorial team. See our methodology for sources, verification process, and update cadence.
Important: Officials shown here reflect the 2023 - 2026 term. Barangay leadership can change due to resignation, succession, or special circumstances. Always verify directly with Castillejos or the barangay hall before relying on this information for any official transaction, legal matter, or formal communication. The next Barangay and SK Elections are scheduled for Monday, November 2, 2026.
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Population history of Barangay San Agustin from official Philippine Statistics Authority census releases.
Census
Population
Change
% change
2015 Census
4,545
—
—
2020 CPH
4,827
+282
+6.2%
2024 POPCEN
4,906
+79
+1.6%
2015–2020: +6.2% total (+1.21%/yr).2020–2024: +1.6% total (+0.41%/yr).
Source: PSA Census of Population (2015), Census of Population and Housing (2020), and POPCEN (2024) as published by the Philippine Statistics Authority. Figures are official as declared by Proclamation.
Comparative Context
2024 POPCEN
Rank in Castillejos
5thof 14
Among the upper half of Castillejos by population.
Share of Castillejos
7.0%
of the municipality's total 70,105 residents.
Rank in Zambales
46thof 247
Province-wide percentile: 82.
PSA Classification
Rural
Lower density, predominantly non-built-up land use.
Income Classification
1st
BLGF highest fiscal capacity tier.
Castillejos (municipality) class
3rd
Parent municipality income class — influences LGU services and budget that reach this barangay.
Rankings derived from the most recent PSA population data for each barangay. Classifications sourced from the Philippine Statistics Authority and Bureau of Local Government Finance.
These services are available at every barangay hall in the Philippines under Republic Act 7160 (Local Government Code). Visit Barangay San Agustin in Castillejos during office hours to request any of the following.
Services listed are based on Republic Act 7160 (Local Government Code of 1991). Specific requirements and fees vary by barangay. Always call the hall before visiting to confirm requirements and availability.
🆘Emergency Hotlines
Verified April 2026. In a life-threatening emergency, dial 911 first.
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Frequently Asked Questions about Barangay San Agustin
Where is Barangay San Agustin located?▾
Barangay San Agustin is a barangay in the municipality of Castillejos, Zambales, Central Luzon, Philippines.
What is the address of the Barangay San Agustin hall?▾
Barangay San Agustin is located in Castillejos, Zambales, Central Luzon, Philippines. The exact street address of the barangay hall is being verified.
Who is the Punong Barangay of Barangay San Agustin?▾
The Punong Barangay of Barangay San Agustin is Darren Ray Valdez Dalit (2023 - 2026 term). The next Barangay and Sangguniang Kabataan Elections are scheduled for Monday, November 2, 2026.
How can I contact Barangay San Agustin?▾
You can contact Barangay San Agustin via phone at 09506998274.
What municipality is Barangay San Agustin part of?▾
Barangay San Agustin is one of 14 barangays in the municipality of Castillejos, Zambales, Philippines.
Is Barangay San Agustin urban or rural?▾
Barangay San Agustin is officially classified as rural by the Philippine Statistics Authority. Rural classification is applied to barangays with lower population density and predominantly non-built-up land use — often agricultural, coastal, or upland areas with more dispersed housing.
What is the income classification of Castillejos?▾
Castillejos is classified as a 3rd by the Bureau of Local Government Finance. This classification is based on the municipality's annual regular income and broadly indicates the size of the local government's budget for services like health, sanitation, peace and order, and infrastructure that reach barangays such as Barangay San Agustin.
Has the population of Barangay San Agustin been growing or shrinking?▾
Between the 2020 and 2024 censuses, Barangay San Agustin went from 4,827 residents to 4,906 — a change of +1.6% over the intercensal period. The barangay is slowly growing based on figures published by the Philippine Statistics Authority in the 2024 POPCEN.
What region of the Philippines is Barangay San Agustin in?▾
Barangay San Agustin is part of the Central Luzon administrative region of the Philippines. Within Central Luzon, the barangay falls under the province of Zambales, and is one of 14 barangays administered by Castillejos.
How many barangays are in Castillejos?▾
Castillejos has 14 barangays, including Barangay San Agustin. You can browse the full list on our Castillejos page.
How many residents does Barangay San Agustin have?▾
Barangay San Agustin had a population of 4,906 residents according to the 2024 POPCEN (Census of Population) published by the Philippine Statistics Authority.
What is the ZIP code of Barangay San Agustin?▾
The primary PHLPost ZIP code for Castillejos is 2208. In most Philippine municipalities, this same ZIP applies to every barangay in the city. However, in NCR cities (Manila, Quezon City, Makati, etc.) and a few large cities like Cebu City, Davao City, and Baguio, each barangay may have its own ZIP code. For the most accurate ZIP for Barangay San Agustin, confirm with PHLPost at https://phlpost.gov.ph.
When was this page last updated?▾
The information on this page for Barangay San Agustin was last updated on 2026-05-24. Barangay leadership, contact information, and hours can change — always verify directly with the barangay hall before relying on this information for any official transaction.
Looking for general barangay-services questions — barangay clearance, cedula, BSKE 2026, or emergency hotlines? See our barangay services guides.
Helpful Guides for Residents of Barangay San Agustin
Editorial process and update cadence documented in our methodology. Errors or corrections welcome via the submission form above. This page was last updated on 2026-05-24.
