San Guillermo

San Guillermo
Municipality
Municipality of San Guillermo
Flag of San Guillermo
Flag
Official seal of San Guillermo
Seal
Map of Isabela with San Guillermo highlighted
Map of Isabela with San Guillermo highlighted
Interactive map of San Guillermo
San Guillermo is located in Philippines
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
CountryPhilippines
RegionCagayan Valley
ProvinceIsabela
District 6th district
FoundedJune 17, 1967
Named afterEugenio Guillermo and Saint William of Maleval
Barangays26 (see Barangays)
Government
 [1]
 • TypeSangguniang Bayan
 • MayorFelipe N. Guyud, Jr.
 • Vice MayorBernadine M. Lucas
 • RepresentativeFaustino Dy III
 • Electorate13,806 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
 • Density64.650/km2 (167.44/sq mi)
 • Households
4,989
Economy
 • Income class4th 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
 • ElectricityIsabela 1 Electric Cooperative (ISELCO 1)
Time zoneUTC+8 (PST)
ZIP code
3308
PSGC
0203128000
IDD : area code +63 (0)78
Native languagesIlocano
Tagalog
Websitewww.sanguillermo-isabela.gov.ph

San Guillermo (Spanish for Saint William), officially the Municipality of San Guillermo, is a municipality in the province of Isabela, 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.

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. It used to consist of 15 barangays from 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 (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 and the municipality's official seat.[7]

Geography

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

Barangays

San Guillermo is politically subdivided into 26 barangays. [8] Each barangay consists of puroks while some have sitios.

  • Anonang
  • Aringay
  • Burgos
  • Calaoagan
  • Centro 1 (Poblacion)
  • Centro 2 (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

Population census of San Guillermo
YearPop.±% 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[16][17][18][19][20][21][22][23]

Circles Resort, a tourism enterprise zone in San Guillermo

Socioeconomic metrics indicate that San Guillermo operates formally as a fourth-income-class municipality within the Philippines. According to the Philippine Statistics Authority, the municipality recorded a poverty incidence rate of 22.09 percent in 2021 among its registered population. A measurable portion of the community experiences persistent food insecurity, prompting the direct intervention of national social welfare initiatives. The Department of Social Welfare and Development included San Guillermo in its Walang Gutom program, which distributes food credits to targeted households to mitigate hunger and malnutrition.[24] Local economic planning aims to address these poverty metrics by promoting domestic investments in poultry production, commercial crop cultivation, and regulated forest management. The municipal government generates revenue from local business taxes, agricultural trade, and national tax allotments to fund administrative and social services aimed at supporting the local workforce. Financial records for the municipality show reliance on these combined revenue streams to sustain public works and poverty alleviation programs across its twenty-six constituent barangays.

The local economy relies heavily on agricultural production and forestry as its primary sources of livelihood. Data from the municipal government indicates that the local agricultural sector focuses on the cultivation of corn, bananas, and pineapples.[25] These crops are harvested and subsequently distributed to neighboring municipalities and regional market centers. Local farming operations vary, ranging from small subsistence agriculture to larger organized commercial crop production. To improve farm efficiency and output, national government agencies provide structural support and technical training to local agricultural workers. The Department of Agrarian Reform established a Farm Business School in the municipality to train groups such as the Estrella Danggayan Agrarian Reform Beneficiaries Cooperative. This educational program teaches farmers resource allocation, systematic farm planning, and business management techniques to transition their operations into financially viable agro-industrial enterprises.[26] Livestock and poultry raising also contribute to the local agricultural output, providing secondary income streams for rural households. The integration of modern farming techniques seeks to establish food security and steady revenue for the local agrarian workforce.

The topography of San Guillermo dictates its specific economic activities and structural land use patterns. The local government reports that the municipality covers a total land area of 45,370 hectares characterized largely by a mountainous, hilly, and rugged landscape. This specific slope classification supports the planting of various fruit-bearing trees and facilitates organized ranching activities across the terrain.[25] The municipal administration identifies the local forested areas as accessible sources of timber, rattan, and bamboo. Commercial timber production and agro-forestry form a core component of the local livelihood, generating revenue for both the municipality and individual laborers. Geographic constraints and inadequate infrastructure routinely affect economic movement within the territory. The presence of underdeveloped roads and bridges complicates the ability of farmers in rural barangays to transport their harvested goods to centralized market centers. Improving these farm-to-market road networks remains a target for local government development in order to facilitate the steady trade of agricultural and forest products. The terrain, while providing natural resources, necessitates continued infrastructure funding to maintain economic stability.

Government

Local government

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, Barangay Council, whose members are called Barangay Councilors. 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)[27]
Position Name
District Representative Faustino Dy III
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 of the province of Isabela, currently represented by Hon. Faustino A. Dy V.[28]

Education

The Schools Division of Isabela governs the town's public education system.[29] The division office is a field office of the DepEd in Cagayan Valley region.[30] The San Guillermo Schools District Office oversees all public and private elementary and high schools within the municipality.[31]

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. ↑  Municipality of San Guillermo | (DILG)
  2. ↑ "2015 Census of Population, Report No. 3 – Population, Land Area, and Population Density" (PDF). Philippine Statistics Authority. Quezon City, Philippines. August 2016. ISSN 0117-1453. Archived (PDF) from the original on May 25, 2021. Retrieved July 16, 2021.
  3. ↑ "2024 Census of Population (POPCEN) Population Counts Declared Official by the President". Philippine Statistics Authority. 17 July 2025. Retrieved 18 July 2025.
  4. ↑ "PSA Releases the 2021 City and Municipal Level Poverty Estimates". Philippine Statistics Authority. 2 April 2024. Retrieved 28 April 2024.
  5. ↑ "2024 Census of Population (POPCEN) Population Counts Declared Official by the President". Philippine Statistics Authority. 17 July 2025. Retrieved 18 July 2025.
  6. ↑ Republic Act No. 4906 (June 17, 1967), An Act Creating the Municipality of San Guillermo in the Province of Isabela, retrieved January 14, 2022
  7. ↑ "History of San Guillermo". Official Website of the Municipality of San Guillermo. Retrieved January 14, 2021.
  8. ↑ "Province:". PSGC Interactive. Quezon City, Philippines: Philippine Statistics Authority. Retrieved 25 August 2025.
  9. ↑ "San Guillermo, Isabela: Average Temperatures and Rainfall". World Weather Online. Retrieved 3 November 2015.
  10. ↑ "2024 Census of Population (POPCEN) Population Counts Declared Official by the President". Philippine Statistics Authority. 17 July 2025. Retrieved 18 July 2025.
  11. ↑ Census of Population (2015). "Region II (Cagayan Valley)". Total Population by Province, City, Municipality and Barangay. Philippine Statistics Authority. Retrieved 20 June 2016.
  12. ↑ Census of Population and Housing (2010). "Region II (Cagayan Valley)" (PDF). Total Population by Province, City, Municipality and Barangay. National Statistics Office. Retrieved 29 June 2016.
  13. ↑ Censuses of Population (1903–2007). "Region II (Cagayan Valley)". Table 1. Population Enumerated in Various Censuses by Province/Highly Urbanized City: 1903 to 2007. National Statistics Office.
  14. ↑ "Province of". Municipality Population Data. Local Water Utilities Administration Research Division. Retrieved 17 December 2016.
  15. ↑ "2024 Census of Population (POPCEN) Population Counts Declared Official by the President". Philippine Statistics Authority. 17 July 2025. Retrieved 18 July 2025.
  16. ↑ "Poverty incidence (PI):". Philippine Statistics Authority. Retrieved December 28, 2020.
  17. ↑ "Estimation of Local Poverty in the Philippines" (PDF). Philippine Statistics Authority. 29 November 2005.
  18. ↑ "2003 City and Municipal Level Poverty Estimates" (PDF). Philippine Statistics Authority. 23 March 2009.
  19. ↑ "City and Municipal Level Poverty Estimates; 2006 and 2009" (PDF). Philippine Statistics Authority. 3 August 2012.
  20. ↑ "2012 Municipal and City Level Poverty Estimates" (PDF). Philippine Statistics Authority. 31 May 2016.
  21. ↑ "Municipal and City Level Small Area Poverty Estimates; 2009, 2012 and 2015". Philippine Statistics Authority. 10 July 2019.
  22. ↑ "PSA Releases the 2018 Municipal and City Level Poverty Estimates". Philippine Statistics Authority. 15 December 2021. Retrieved 22 January 2022.
  23. ↑ "PSA Releases the 2021 City and Municipal Level Poverty Estimates". Philippine Statistics Authority. 2 April 2024. Retrieved 28 April 2024.
  24. ↑ "The 'Walang Gutom 2027 Program ': A Pivotal Step Towards Eradicating Hunger in the Philippines". Philippine Information Agency. 2025-02-15. Retrieved 2026-06-25.
  25. 1 2 "Municipal Profile | Official Website Of Municipality of San Guillermo". Retrieved 2026-06-25.
  26. ↑ Edale, Merlito G.; Jr. (2026-04-28). "Isabela farmers gain skills to improve productivity through DAR Farm Business School". Philippine Information Agency. Retrieved 2026-06-25.
  27. ↑ "San Guillermo, Isabela Election Results 2022". Rappler PH. ph.rappler.com. Archived from the original on May 22, 2022. Retrieved May 13, 2022.
  28. ↑ "House of Representatives: 19th Congress". Official Website of the House of Representatives PH. congress.gov.ph. Retrieved May 15, 2022.
  29. ↑ "HISTORY OF DEPED-ISABELA". DepED Isabela | The official website of DepED Schools Division of Isabela. Retrieved March 13, 2022.
  30. ↑ "DEPED REGIONAL OFFICE NO. 02". DepED RO2 | The official website of DepED Regional Office No. 02. Archived from the original on 2022-04-12. Retrieved 2022-03-12.
  31. ↑ "Masterlist of Schools" (PDF). Department of Education. January 15, 2021. Retrieved April 11, 2025.
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