# San Guillermo

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Municipality in Isabela, Philippines

This article is about the municipality in the Philippines; not to be confused with [the Argentinian city in San Cristóbal Department](/source/San_Cristobal_Department).

Municipality in Cagayan Valley, Philippines

San Guillermo Municipality Municipality of San Guillermo Flag Seal Map of Isabela with San Guillermo highlighted Interactive map of San Guillermo San Guillermo Location within the Philippines Coordinates: 16°43′28″N 121°48′36″E / 16.7244°N 121.81°E / 16.7244; 121.81 Country Philippines Region Cagayan Valley Province Isabela District 6th district Founded June 17, 1967 Named after Eugenio Guillermo Barangays 26 (see Barangays) Government [1] • Type Sangguniang Bayan • Mayor Felipe N. Guyud, Jr. • Vice Mayor Bernadine M. Lucas • Representative Faustino A. Dy V • Electorate 13,806 voters (2025) Area [2] • Total 325.49 km2 (125.67 sq mi) Elevation 88 m (289 ft) Highest elevation 128 m (420 ft) Lowest elevation 43 m (141 ft) Population (2024 census)[3] • Total 21,043 • Density 64.650/km2 (167.44/sq mi) • Households 4,989 Economy • Income class 4th municipal income class • Poverty incidence 22.09 % (2021)[4] • Revenue ₱ 203 million (2024) • Assets ₱ 587.8 million (2024) • Expenditure ₱ 141.8 million (2024) • Liabilities ₱ 90.51 million (2024) Service provider • Electricity Isabela 1 Electric Cooperative (ISELCO 1) Time zone UTC+8 (PST) ZIP code 3308 PSGC 0203128000 IDD : area code +63 (0)78 Native languages Ilocano Tagalog Website www.sanguillermo-isabela.gov.ph

**San Guillermo** ([Spanish](/source/Spanish_language) for Saint William), officially the **Municipality of San Guillermo**, is a [municipality](/source/Municipality_of_the_Philippines) in the [province](/source/Philippine_Province) of [Isabela](/source/Isabela_(province)), [Philippines](/source/Philippines). According to the 2024 census, it has a population of 21,043 people.[5]

## Etymology

The town was named after Eugenio Guillermo, former mayor of [Angadanan](/source/Angadanan).

## History

On June 17, 1967, the municipality of San Guillermo was created by virtue of Republic Act No. 4906,[6] sponsored by Melanio Singson, the then-representative of [Isabela's lone district](/source/Isabela's_at-large_congressional_district). It used to consist of 15 barangays from [Angadanan](/source/Angadanan) (i.e. Anonang, Colorado, Calaoagan, Dipacamo, Peredo Edcor, Guam, Nakar, Palawan, Progreso, San Francisco Norte, San Mariano Norte, San Mariano Sur, Villa Rose, Villa Sanchez, and Villa Teresita) and four from [Echague](/source/Echague) (i.e. Aringay, Dingading, San Francisco Sur and Sinalugan).

Due to a noticeable increase in the rate of population migration and potential economic growth, additional barangays were created during the term of Mayor Alvaro Filart, such as barangays Burgos, Dietban, Estrella, Rizal, San Rafael and Villa Remedios. Subsequently, barangay Peredo Edcor was split into two barangays, namely: Centro 1 and Centro 2, which is now the *[poblacion](/source/Poblacion)* and the municipality's official seat.[7]

## Geography

San Guillermo is situated 69.94 kilometres (43.46 mi) from the provincial capital [Ilagan](/source/Ilagan), and 399.93 kilometres (248.50 mi) from the country's capital city of [Manila](/source/Manila).

### Barangays

San Guillermo is politically subdivided into 26 [barangays](/source/Barangay). [8] Each barangay consists of [puroks](/source/Purok) while some have [sitios](/source/Sitios).

- Anonang

- Aringay

- Burgos

- Calaoagan

- Centro 1 ([Poblacion](/source/Poblacion))

- Centro 2 ([Poblacion](/source/Poblacion))

- Colorado

- Dietban

- Dingading

- Dipacamo

- Estrella

- Guam

- Nakar

- Palawan

- Progreso

- Rizal

- San Francisco Norte

- San Francisco Sur

- San Mariano Norte

- San Mariano Sur

- San Rafael

- Sinalugan

- Villa Remedios

- Villa Rose

- Villa Sanchez

- Villa Teresita

### Climate

Climate data for San Guillermo, Isabela Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Mean daily maximum °C (°F) 29 (84) 30 (86) 32 (90) 35 (95) 35 (95) 35 (95) 34 (93) 33 (91) 32 (90) 31 (88) 30 (86) 28 (82) 32 (90) Mean daily minimum °C (°F) 19 (66) 20 (68) 21 (70) 23 (73) 23 (73) 24 (75) 23 (73) 23 (73) 23 (73) 22 (72) 21 (70) 20 (68) 22 (71) Average precipitation mm (inches) 31.2 (1.23) 23 (0.9) 27.7 (1.09) 28.1 (1.11) 113.5 (4.47) 141.4 (5.57) 176.4 (6.94) 236.6 (9.31) 224.9 (8.85) 247.7 (9.75) 222.9 (8.78) 178 (7.0) 1,651.4 (65) Average rainy days 10 6 5 5 13 12 15 15 15 17 16 15 144 Source: World Weather Online[9]

## Demographics

‹ The [template](https://en.wikipedia.org/wiki/Help:Template) *[Historical populations](https://en.wikipedia.org/wiki/Template:Historical_populations)* is being [considered for merging](https://en.wikipedia.org/wiki/Wikipedia:Templates_for_discussion/Log/2026_June_24#Template:Infobox_demographics). ›

Population census of San Guillermo Year Pop. ±% p.a. 1970 9,970 — 1975 5,573 −11.01% 1980 6,985 +4.62% 1990 10,700 +4.36% 1995 12,506 +2.97% 2000 13,338 +1.39% 2007 16,865 +3.29% 2010 18,423 +3.27% 2015 20,200 +1.77% 2020 20,915 +0.73% 2024 21,043 +0.15% Source: Philippine Statistics Authority[10][11][12][13][14]

In the 2024 census, the population of San Guillermo was 21,043 people,[15] with a density of 65 inhabitants per square kilometre or 170 inhabitants per square mile.

## Economy

**Poverty incidence of San Guillermo**

10

20

30

40

50

60

2000
 50.89

2003
 33.43

2006
 36.10

2009
 21.62

2012
 27.61

2015
 23.53

2018
 27.20

2021
 22.09

**Source:** [Philippine Statistics Authority](/source/Philippine_Statistics_Authority)[16][17][18][19][20][21][22][23]

## Government

### Local government

Main article: [Sangguniang Bayan](/source/Sangguniang_Bayan)

As a municipality in the Province of Isabela, government officials at the provincial and municipal levels are voted by the town. The provincial government has political jurisdiction over most local transactions of the municipal government.

The Municipality of San Guillermo is governed by a mayor, designated as its local chief executive, and by a municipal council as its legislative body in accordance with the Local Government Code. The mayor, vice mayor, and the municipal councilors are elected directly through elections held every three years.

Barangays are also headed by elected officials: [Barangay Captain](/source/Barangay_Captain), [Barangay Council](/source/Sangguniang_Barangay), whose members are called [Barangay Councilors](/source/Barangay_Kagawad). The barangays have SK federation which represents the barangay, headed by SK chairperson and whose members are called SK councilors. All officials are also elected every three years.

### Elected officials

Members of the San Guillermo Municipal Council (2022-2025)[24] Position Name District Representative Faustino A. Dy V Municipal Mayor Felipe N. Guyud, Jr. Municipal Vice-Mayor Bernardine M. Lucas Municipal Councilors Marilou N. Sanchez John N. Sanchez Harrison S. Guyud Jolly A. De Guzman Florido N. Marcos Ricardo G. Castañeda Marcelina L. Cabaero Emmanuel N. Guyud

### Congress representation

San Guillermo, belonging to the [sixth legislative district](/source/Legislative_districts_of_Isabela) of the province of Isabela, currently represented by Hon. Faustino A. Dy V.[25]

## Education

The Schools Division of Isabela governs the town's public education system.[26] The division office is a field office of the [DepEd](/source/Department_of_Education_(Philippines)) in [Cagayan Valley](/source/Cagayan_Valley) region.[27] The San Guillermo Schools District Office oversees all public and private elementary and high schools within the municipality.[28]

### Primary and elementary schools

- Anonang Primary School

- Aringay Primary School

- Burgos East Elementary School

- Burgos West Elementary School

- Calaoagan Primary School

- Dilucot Primary School

- Dipacamo Elementary School

- Dipugo Primary School

- Estrella Primary School

- Guam Elementary School

- Nakar Primary School

- Progreso Elementary School

- San Francisco Norte Elementary School

- San Francisco Sur Primary School

- San Guillermo Central School

- San Mariano Norte Primary School

- San Mariano Sur Primary School

- San Rafael Primary School

- Sinag Tala Learning Center of San Guillermo

- Sinalugan Primary School

- Southern Isabela Academy (Preparatory and Elementary Department)

- Villa Remedios Primary School

- Villa Rose Elementary School

- Villa Sanchez Primary Schoo

- Villa Teresita Primary School

### Secondary schools

- Colorado Integrated School

- Dietban Integrated School

- Dingading Integrated School

- Palawan Integrated School

- San Guillermo Vocational & Industrial High School

- Southern Isabela Academy (JHS and SHS)

## References

1. **[^](#cite_ref-1)** [Municipality of San Guillermo](https://lgu201.dilg.gov.ph/view.php?r=02&p=31&m=28) | [(DILG)](/source/Department_of_Interior_and_Local_Government)

1. **[^](#cite_ref-popcen2015_r3_2-0)** ["2015 Census of Population, Report No. 3 – Population, Land Area, and Population Density"](https://www.psa.gov.ph/sites/default/files/_POPCEN%20Report%20No.%203.pdf) (PDF). *Philippine Statistics Authority*. Quezon City, Philippines. August 2016. [ISSN](/source/ISSN_(identifier)) [0117-1453](https://search.worldcat.org/issn/0117-1453). [Archived](https://web.archive.org/web/20210525030629/https://www.psa.gov.ph/sites/default/files/_POPCEN%20Report%20No.%203.pdf) (PDF) from the original on May 25, 2021. Retrieved July 16, 2021.

1. **[^](#cite_ref-3)** ["2024 Census of Population (POPCEN) Population Counts Declared Official by the President"](https://psa.gov.ph/content/2024-census-population-popcen-population-counts-declared-official-president). Philippine Statistics Authority. 17 July 2025. Retrieved 18 July 2025.

1. **[^](#cite_ref-4)** ["PSA Releases the 2021 City and Municipal Level Poverty Estimates"](https://www.psa.gov.ph/content/psa-releases-2021-city-and-municipal-level-poverty-estimates). Philippine Statistics Authority. 2 April 2024. Retrieved 28 April 2024.

1. **[^](#cite_ref-5)** ["2024 Census of Population (POPCEN) Population Counts Declared Official by the President"](https://psa.gov.ph/content/2024-census-population-popcen-population-counts-declared-official-president). Philippine Statistics Authority. 17 July 2025. Retrieved 18 July 2025.

1. **[^](#cite_ref-6)** Republic Act No. 4906 (June 17, 1967), [*An Act Creating the Municipality of San Guillermo in the Province of Isabela*](https://thecorpusjuris.com/legislative/republic-acts/ra-no-4906.php), retrieved January 14, 2022

1. **[^](#cite_ref-7)** ["History of San Guillermo"](https://lgusanguillermo.gov.ph/about-us/history/). *Official Website of the Municipality of San Guillermo*. Retrieved January 14, 2021.

1. **[^](#cite_ref-nscb-area_8-0)** ["Province:"](https://psa.gov.ph/classification/psgc/citimuni/020300000). *PSGC Interactive*. Quezon City, Philippines: [Philippine Statistics Authority](/source/Philippine_Statistics_Authority). Retrieved 25 August 2025.

1. **[^](#cite_ref-met_norms_9-0)** ["San Guillermo, Isabela: Average Temperatures and Rainfall"](http://www.worldweatheronline.com/San-Guillermo-weather-averages/Isabela/PH.aspx). World Weather Online. Retrieved 3 November 2015.

1. **[^](#cite_ref-10)** ["2024 Census of Population (POPCEN) Population Counts Declared Official by the President"](https://psa.gov.ph/content/2024-census-population-popcen-population-counts-declared-official-president). Philippine Statistics Authority. 17 July 2025. Retrieved 18 July 2025.

1. **[^](#cite_ref-PSA15–02_11-0)** Census of Population (2015). ["Region II (Cagayan Valley)"](https://psa.gov.ph/system/files/phcd/2022-12/R02.xlsx). *Total Population by Province, City, Municipality and Barangay*. [Philippine Statistics Authority](/source/Philippine_Statistics_Authority). Retrieved 20 June 2016.

1. **[^](#cite_ref-NSO10–02_12-0)** Census of Population and Housing (2010). ["Region II (Cagayan Valley)"](https://psa.gov.ph/system/files/phcd/2022-12/Cagayan%2520Valley.pdf) (PDF). *Total Population by Province, City, Municipality and Barangay*. [National Statistics Office](/source/Philippine_Statistics_Authority#National_Statistics_Office). Retrieved 29 June 2016.

1. **[^](#cite_ref-NSO07-02_13-0)** Censuses of Population (1903–2007). ["Region II (Cagayan Valley)"](https://archive.org/download/PhilippinesCensusofPopulationLGUs19032007/Region%202%20Cagayan%20Valley%20Philippines%20Census%20of%20Population%201903%20-%202007.xls). [*Table 1. Population Enumerated in Various Censuses by Province/Highly Urbanized City: 1903 to 2007*](https://archive.org/download/PhilippinesCensusofPopulationLGUs19032007). [National Statistics Office](/source/Philippine_Statistics_Authority#National_Statistics_Office).

1. **[^](#cite_ref-LWUA-PopulationData_14-0)** ["Province of"](http://122.54.214.222/population/MunPop.asp?prov=). *Municipality Population Data*. [Local Water Utilities Administration](/source/Local_Water_Utilities_Administration) Research Division. Retrieved 17 December 2016.

1. **[^](#cite_ref-15)** ["2024 Census of Population (POPCEN) Population Counts Declared Official by the President"](https://psa.gov.ph/content/2024-census-population-popcen-population-counts-declared-official-president). Philippine Statistics Authority. 17 July 2025. Retrieved 18 July 2025.

1. **[^](#cite_ref-16)** ["Poverty incidence (PI):"](https://psa.gov.ph/content/poverty-incidence-pi). Philippine Statistics Authority. Retrieved December 28, 2020.

1. **[^](#cite_ref-17)** ["Estimation of Local Poverty in the Philippines"](https://psa.gov.ph/sites/default/files/NSCB_LocalPovertyPhilippines_0.pdf) (PDF). Philippine Statistics Authority. 29 November 2005.

1. **[^](#cite_ref-18)** ["2003 City and Municipal Level Poverty Estimates"](https://psa.gov.ph/sites/default/files/2003%20SAE%20of%20poverty%20(Full%20Report)_1.pdf) (PDF). Philippine Statistics Authority. 23 March 2009.

1. **[^](#cite_ref-19)** ["City and Municipal Level Poverty Estimates; 2006 and 2009"](https://psa.gov.ph/sites/default/files/2006%20and%202009%20City%20and%20Municipal%20Level%20Poverty%20Estimates_0_1.pdf) (PDF). Philippine Statistics Authority. 3 August 2012.

1. **[^](#cite_ref-20)** ["2012 Municipal and City Level Poverty Estimates"](https://psa.gov.ph/sites/default/files/2012%20Municipal%20and%20City%20Level%20Poverty%20Estimates%20Publication%20(1).pdf) (PDF). Philippine Statistics Authority. 31 May 2016.

1. **[^](#cite_ref-21)** ["Municipal and City Level Small Area Poverty Estimates; 2009, 2012 and 2015"](https://psa.gov.ph/sites/default/files/City%20and%20Municipal-level%20Small%20Area%20Poverty%20Estimates_%202009%2C%202012%20and%202015_0.xlsx). Philippine Statistics Authority. 10 July 2019.

1. **[^](#cite_ref-22)** ["PSA Releases the 2018 Municipal and City Level Poverty Estimates"](https://psa.gov.ph/content/psa-releases-2018-municipal-and-city-level-poverty-estimates). Philippine Statistics Authority. 15 December 2021. Retrieved 22 January 2022.

1. **[^](#cite_ref-23)** ["PSA Releases the 2021 City and Municipal Level Poverty Estimates"](https://www.psa.gov.ph/content/psa-releases-2021-city-and-municipal-level-poverty-estimates). Philippine Statistics Authority. 2 April 2024. Retrieved 28 April 2024.

1. **[^](#cite_ref-24)** ["San Guillermo, Isabela Election Results 2022"](https://web.archive.org/web/20220522224804/https://ph.rappler.com/elections/2022/isabela/san-guillermo). *Rappler PH*. ph.rappler.com. Archived from [the original](https://ph.rappler.com/elections/2022/isabela/san-guillermo) on May 22, 2022. Retrieved May 13, 2022.

1. **[^](#cite_ref-25)** ["House of Representatives: 19th Congress"](https://www.congress.gov.ph/members/search.php?id=dy-inno). *Official Website of the House of Representatives PH*. congress.gov.ph. Retrieved May 15, 2022.

1. **[^](#cite_ref-26)** ["HISTORY OF DEPED-ISABELA"](https://deped-isabela.com.ph/transparency/about-sdo-isabela/history/). *DepED Isabela | The official website of DepED Schools Division of Isabela*. Retrieved March 13, 2022.

1. **[^](#cite_ref-27)** ["DEPED REGIONAL OFFICE NO. 02"](https://web.archive.org/web/20220412180850/https://region2.deped.gov.ph/page/14/). *DepED RO2 | The official website of DepED Regional Office No. 02*. Archived from [the original](https://region2.deped.gov.ph/page/14/) on 2022-04-12. Retrieved 2022-03-12.

1. **[^](#cite_ref-28)** ["Masterlist of Schools"](https://www.deped.gov.ph/wp-content/uploads/2021/06/SY-2020-2021-Masterlist-of-Schools-Address-only-1-1.pdf) (PDF). *Department of Education*. January 15, 2021. Retrieved April 11, 2025.

## External links

- [Municipal Profile at the National Competitiveness Council of the Philippines](http://www.competitive.org.ph/cmcindex/pages/profile/?lgu=San%20Guillermo) [Archived](https://web.archive.org/web/20170202040759/http://www.competitive.org.ph/cmcindex/pages/profile/?lgu=San%20Guillermo) 2017-02-02 at the [Wayback Machine](/source/Wayback_Machine)

- [San Guillermo at the Isabela Government Website](http://provinceofisabela.ph/index.php/municipalities/2013-07-10-15-06-24/2013-07-10-15-10-09)

- [Local Governance Performance Management System](http://www.blgs.gov.ph/lgpmsv2/cmshome/index.php?pageID=23&frmIdDcfCode=7&fLguType=CM&frmIdRegion=2&frmIdProvince=21&frmIdLgu=298) [Archived](https://web.archive.org/web/20161010201809/http://www.blgs.gov.ph/lgpmsv2/cmshome/index.php?pageID=23) 2016-10-10 at the [Wayback Machine](/source/Wayback_Machine)

- [Philippine Standard Geographic Code](https://psa.gov.ph/classification/psgc/barangays/0203128000)

- [Philippine Census Information](https://web.archive.org/web/20081120024509/http://www.census.gov.ph/data/census2007/index.html)

- [Municipality of San Guillermo](https://web.archive.org/web/20070930040757/http://www.sanguillermo-isabela.gov.ph/)

Places adjacent to San Guillermo Cauayan San Mariano Angadanan San Guillermo Dinapigue Echague

v t e Province of Isabela Ilagan (capital and largest city) Municipalities Alicia Angadanan Aurora Benito Soliven Burgos Cabagan Cabatuan Cordon Delfin Albano Dinapigue Divilacan Echague Gamu Jones Luna Maconacon Mallig Naguilian Palanan Quezon Quirino Ramon Reina Mercedes Roxas San Agustin San Guillermo San Isidro San Manuel San Mariano San Mateo San Pablo Santa Maria Santo Tomas Tumauini Component cities Cauayan Ilagan Independent component city Santiago (Administratively independent from the province but grouped under Isabela by the Philippine Statistics Authority.) Barangays See: List of barangays in Isabela

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Adapted from the Wikipedia article [San Guillermo](https://en.wikipedia.org/wiki/San_Guillermo) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/San_Guillermo?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.