Barangay Buyasan is a local government unit in San Mariano, Isabela, in the Cagayan Valley region of the Philippines. It had a population of 787 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 San Mariano. In NCR and some large cities, barangays can have different ZIPs. Confirm with PHLPost.
Punong Barangay
Sherwin Marquez Maneja(2023 - 2026 term)
Next BSKE
November 2, 2026
Barangay Buyasan · Data updated 2026-05-27
About Barangay Buyasan
Situated in San Mariano, Isabela, Barangay Buyasan is one of 36 barangays that make up the municipality within Cagayan Valley.
According to the 2024 POPCEN (Census of Population) published by the Philippine Statistics Authority, Barangay Buyasan had a population of 787. This made it the 32nd largest of 36 barangays in San Mariano by population, placing it among the smaller barangays of the municipality. Residents of Barangay Buyasan accounted for approximately 1.27% of the total population of San Mariano, which stood at 61,876 in the same 2024 POPCEN reference period.
Read more about Barangay BuyasanShow less
The barangay recorded 814 residents in the 2020 Census of Population and Housing and 787 residents in the 2024 POPCEN — a net change of -3.3%, consistent with a contracting settlement. Barangay Buyasan is officially classified as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.
San Mariano is a municipality comprising 36 barangays, and serves as the governing unit directly responsible for local services in Barangay Buyasan, including public health, sanitation, peace and order, and civil registration. Within the wider province of Isabela, which contains 1,055 barangays across its component cities and municipalities, Barangay Buyasan ranks 792nd by 2024 POPCEN population. Isabela is classified as a 1st 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 San Mariano 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 Buyasan from official Philippine Statistics Authority census releases.
Census
Population
Change
% change
2015 Census
722
—
—
2020 CPH
814
+92
+12.7%
2024 POPCEN
787
-27
-3.3%
2015–2020: +12.7% total (+2.43%/yr).2020–2024: -3.3% total (-0.84%/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 San Mariano
32ndof 36
Among the smaller barangays of San Mariano by population.
Share of San Mariano
1.3%
of the municipality's total 61,876 residents.
Rank in Isabela
792ndof 1,055
Province-wide percentile: 25.
PSA Classification
Rural
Lower density, predominantly non-built-up land use.
Income Classification
1st
BLGF highest fiscal capacity tier.
San Mariano (municipality) class
1st
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 Buyasan in San Mariano 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.
24/7 helpline for children in crisis, abuse, and trafficking cases.
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Frequently Asked Questions about Barangay Buyasan
Where is Barangay Buyasan located?▾
Barangay Buyasan is a barangay in the municipality of San Mariano, Isabela, Cagayan Valley, Philippines.
What is the address of the Barangay Buyasan hall?▾
Barangay Buyasan is located in San Mariano, Isabela, Cagayan Valley, Philippines. The exact street address of the barangay hall is being verified.
Who is the Punong Barangay of Barangay Buyasan?▾
The Punong Barangay of Barangay Buyasan is Sherwin Marquez Maneja (2023 - 2026 term). The next Barangay and Sangguniang Kabataan Elections are scheduled for Monday, November 2, 2026.
How can I contact Barangay Buyasan?▾
Verified contact information for Barangay Buyasan is being collected. You can reach the local barangay hall in person or check the official San Mariano LGU website. Submit verified information using the form on this page.
What municipality is Barangay Buyasan part of?▾
Barangay Buyasan is one of 36 barangays in the municipality of San Mariano, Isabela, Philippines.
Is Barangay Buyasan urban or rural?▾
Barangay Buyasan 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 San Mariano?▾
San Mariano is classified as a 1st 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 Buyasan.
Has the population of Barangay Buyasan been growing or shrinking?▾
Between the 2020 and 2024 censuses, Barangay Buyasan went from 814 residents to 787 — a change of -3.3% over the intercensal period. The barangay is slowly contracting based on figures published by the Philippine Statistics Authority in the 2024 POPCEN.
What region of the Philippines is Barangay Buyasan in?▾
Barangay Buyasan is part of the Cagayan Valley administrative region of the Philippines. Within Cagayan Valley, the barangay falls under the province of Isabela, and is one of 36 barangays administered by San Mariano.
How many barangays are in San Mariano?▾
San Mariano has 36 barangays, including Barangay Buyasan. You can browse the full list on our San Mariano page.
How many residents does Barangay Buyasan have?▾
Barangay Buyasan had a population of 787 residents according to the 2024 POPCEN (Census of Population) published by the Philippine Statistics Authority.
What is the ZIP code of Barangay Buyasan?▾
The primary PHLPost ZIP code for San Mariano is 3332. 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 Buyasan, confirm with PHLPost at https://phlpost.gov.ph.
When was this page last updated?▾
The information on this page for Barangay Buyasan was last updated on 2026-05-27. 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.
Editorial process and update cadence documented in our methodology. Errors or corrections welcome via the submission form above. This page was last updated on 2026-05-27.
