Barangay San Isidro Sur is a local government unit in City of Sto. Tomas, Batangas, in the CALABARZON region of the Philippines. It had a population of 1,890 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 City of Sto. Tomas. In NCR and some large cities, barangays can have different ZIPs. Confirm with PHLPost.
Next BSKE
November 2, 2026
Barangay San Isidro Sur · Data updated 2026-05-24
About Barangay San Isidro Sur
Barangay San Isidro Sur is a small barangay in the City of Sto. Tomas, located in the province of Batangas, in the CALABARZON region of the Philippines.
According to the 2024 POPCEN (Census of Population) published by the Philippine Statistics Authority, Barangay San Isidro Sur had a population of 1,890. This made it the 29th largest of 30 barangays in City of Sto. Tomas by population, placing it among the smaller barangays of the city. Residents of Barangay San Isidro Sur accounted for approximately 0.83% of the total population of City of Sto. Tomas, which stood at 226,772 in the same 2024 POPCEN reference period.
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The barangay recorded 3,377 residents in the 2020 Census of Population and Housing and 1,890 residents in the 2024 POPCEN — a net change of -44.0%, consistent with a contracting settlement. Barangay San Isidro Sur is officially classified as urban, reflecting the density and built-up character of the area.
City of Sto. Tomas is a city comprising 30 barangays, and serves as the governing unit directly responsible for local services in Barangay San Isidro Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of Batangas, which contains 1,078 barangays across its component cities and municipalities, Barangay San Isidro Sur ranks 576th by 2024 POPCEN population. Batangas is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.
Barangay San Isidro Sur is governed by an elected Sangguniang Barangay composed of a Punong Barangay and seven kagawads, with the Sangguniang Kabataan representing the youth. The next BSKE, set for Monday, November 2, 2026, will elect officials to four-year terms as provided under Republic Act No. 12232.
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.
The current Sangguniang Barangay leadership for Barangay San Isidro Sur is being verified against the DILG Barangay Officials Masterlist. Other details about this barangay — including census population, urban/rural classification, income class, and administrative hierarchy — are documented in the sections below.
The next Barangay and Sangguniang Kabataan Elections are scheduled for Monday, November 2, 2026 under Republic Act No. 12232. Each Punong Barangay, Kagawad, and SK Chairperson serves a four-year term.
Are you a resident or official of Barangay San Isidro Sur? Use the form below to share verified officials, the hall address, or a contact number. All submissions are reviewed by our editorial team before publication.
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Population history of Barangay San Isidro Sur from official Philippine Statistics Authority census releases.
Census
Population
Change
% change
2015 Census
2,653
—
—
2020 CPH
3,377
+724
+27.3%
2024 POPCEN
1,890
-1,487
-44.0%
2015–2020: +27.3% total (+4.94%/yr).2020–2024: -44.0% total (-13.51%/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 City of Sto. Tomas
29thof 30
Among the smaller barangays of City of Sto. Tomas by population.
Share of City of Sto. Tomas
0.83%
of the city's total 226,772 residents.
Rank in Batangas
576thof 1,078
Province-wide percentile: 47.
PSA Classification
Urban
Higher density, predominantly built-up land use.
Income Classification
1st
BLGF highest fiscal capacity tier.
City of Sto. Tomas (city) class
1st (as Mun)
Parent city 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 Isidro Sur in City of Sto. Tomas 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.
Notice a hotline change? Report it so we can update this page.
Frequently Asked Questions about Barangay San Isidro Sur
Where is Barangay San Isidro Sur located?▾
Barangay San Isidro Sur is a barangay in the City of Sto. Tomas, Batangas, CALABARZON, Philippines.
What is the address of the Barangay San Isidro Sur hall?▾
Barangay San Isidro Sur is located in City of Sto. Tomas, Batangas, CALABARZON, Philippines. The exact street address of the barangay hall is being verified.
Who is the Punong Barangay of Barangay San Isidro Sur?▾
The current Punong Barangay information for Barangay San Isidro Sur is being verified. The position is elected during the Barangay and SK Elections (BSKE), with the next election scheduled for Monday, November 2, 2026.
How can I contact Barangay San Isidro Sur?▾
Verified contact information for Barangay San Isidro Sur is being collected. You can reach the local barangay hall in person or check the official City of Sto. Tomas LGU website. Submit verified information using the form on this page.
What city is Barangay San Isidro Sur part of?▾
Barangay San Isidro Sur is one of 30 barangays in the City of Sto. Tomas, Batangas, Philippines.
Is Barangay San Isidro Sur urban or rural?▾
Barangay San Isidro Sur is officially classified as urban by the Philippine Statistics Authority. Urban classification reflects higher population density and a more built-up character — typically more permanent housing, paved roads, and proximity to commercial activity than rural barangays in the same city.
What is the income classification of City of Sto. Tomas?▾
City of Sto. Tomas is classified as a 1st (as mun) by the Bureau of Local Government Finance. This classification is based on the city'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 Isidro Sur.
Has the population of Barangay San Isidro Sur been growing or shrinking?▾
Between the 2020 and 2024 censuses, Barangay San Isidro Sur went from 3,377 residents to 1,890 — a change of -44.0% over the intercensal period. The barangay is shrinking significantly based on figures published by the Philippine Statistics Authority in the 2024 POPCEN.
What region of the Philippines is Barangay San Isidro Sur in?▾
Barangay San Isidro Sur is part of the CALABARZON administrative region of the Philippines. Within CALABARZON, the barangay falls under the province of Batangas, and is one of 30 barangays administered by City of Sto. Tomas.
How many barangays are in City of Sto. Tomas?▾
City of Sto. Tomas has 30 barangays, including Barangay San Isidro Sur. You can browse the full list on our City of Sto. Tomas page.
How many residents does Barangay San Isidro Sur have?▾
Barangay San Isidro Sur had a population of 1,890 residents according to the 2024 POPCEN (Census of Population) published by the Philippine Statistics Authority.
What is the ZIP code of Barangay San Isidro Sur?▾
The primary PHLPost ZIP code for City of Sto. Tomas is 4234. 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 Isidro Sur, confirm with PHLPost at https://phlpost.gov.ph.
When was this page last updated?▾
The information on this page for Barangay San Isidro Sur 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 Isidro Sur
Information on Barangay San Isidro Sur, City of Sto. Tomas is compiled from the following authoritative sources. Each citation links to the primary publisher.
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.
