Diffun

Diffun, officially the Municipality of Diffun (Ilocano: Ili ti Diffun; Tagalog: Bayan ng Diffun), is a municipality in the province of Quirino, Philippines. According to the 2020 census, it has a population of 56,102 people.^[3]

Diffun
Municipality
Municipality of Diffun
Diffun Town Hall
Flag Seal
Map of Quirino with Diffun highlighted
OpenStreetMap
Diffun Location within the Philippines
Coordinates: 16°35′37″N 121°30′09″E
Country	Philippines
Region	Cagayan Valley
Province	Quirino
District	Lone district
Barangays	33 (see Barangays)
Government  [1]
• Type	Sangguniang Bayan
• Mayor	May G. Calaunan
• Vice Mayor	Marlito G. Corpuz
• Representative	Junie E. Cua
• Municipal Council	Members Cesar M. Agustin Ma. Karen A. Baldonado-Guillermo Gloria C. Antolin Renato M. Antolin Elpidio G. Javonillo Michael A. Lidiang Roseller A. Escobar Cesar C. Valencia
• Electorate	32,761 voters (2025)
Area [2]
• Total	320.10 km2 (123.59 sq mi)
Elevation	160 m (520 ft)
Highest elevation	551 m (1,808 ft)
Lowest elevation	95 m (312 ft)
Population  (2020 census)[3]
• Total	56,102
• Density	180/km2 (450/sq mi)
• Households	13,942
Economy
• Income class	2nd municipal income class
• Poverty incidence	10.07 % (2021)[4]
• Revenue	₱ 317.3 million (2022)
• Assets	₱ 790.9 million (2022)
• Expenditure	₱ 240.3 million (2022)
• Liabilities	₱ 225.9 million (2022)
Service provider
• Electricity	Quirino Electric Cooperative (QUIRELCO)
Time zone	UTC+8 (PST)
ZIP code	3401
PSGC	0205703000
IDD : area code	+63 (0)78
Native languages	Ilocano Bugkalot Tagalog
Website	www.diffun-quirino.gov.ph

Commercial establishments proliferated along the provincial road due to its proximity to Santiago City as the main commercial hub of the region.

Diffun is the most populous town in Quirino Province and is 9 kilometres (5.6 mi) from Cabarroguis, 21 kilometres (13 mi) from Santiago City, and 389 kilometres (242 mi) from Manila.

Geography

Diffun is situated 10.99 kilometres (6.83 mi) from the provincial capital Cabarroguis, and 360.48 kilometres (223.99 mi) from the country's capital city of Manila.

Barangays

Diffun is politically subdivided into 33 barangays. Each barangay consists of puroks and some have sitios.

• Andres Bonifacio (Poblacion)
• Aurora East (Poblacion)
• Aurora West (Poblacion)
• Baguio Village
• Balagbag
• Bannawag
• Cajel
• Campamento
• Diego Silang
• Sittio Der-an
• Don Mariano Perez, Sr.
• Doña Imelda
• Dumanisi
• Gabriela Silang
• Gulac
• Guribang
• Ifugao Village
• Isidro Paredes
• Rizal (Poblacion)
• Liwayway
• Luttuad
• Magsaysay
• Makate
• Maria Clara
• Rafael Palma (Don Sergio Osm)
• Ricarte Norte
• Ricarte Sur
• San Antonio
• San Isidro
• San Pascual
• Villa Pascua
• Aklan Village
• Gregorio Pimentel
• Don Faustino Pagaduan

Climate

Climate data for Diffun, Quirino
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean daily maximum °C (°F)	25 (77)	26 (79)	29 (84)	32 (90)	32 (90)	31 (88)	30 (86)	30 (86)	30 (86)	29 (84)	27 (81)	25 (77)	29 (84)
Mean daily minimum °C (°F)	19 (66)	20 (68)	21 (70)	23 (73)	24 (75)	24 (75)	24 (75)	24 (75)	24 (75)	23 (73)	22 (72)	21 (70)	22 (72)
Average precipitation mm (inches)	119 (4.7)	83 (3.3)	54 (2.1)	37 (1.5)	133 (5.2)	132 (5.2)	161 (6.3)	163 (6.4)	153 (6.0)	142 (5.6)	160 (6.3)	224 (8.8)	1,561 (61.4)
Average rainy days	18.4	13.6	11.6	9.4	19.3	21.9	23.9	23.4	21.1	16.3	18.1	21.4	218.4
Source: Meteoblue[5]

Demographics

Population census of Diffun

Year	Pop.	±% p.a.
1960	9,106	—
1970	14,233	+4.56%
1975	17,811	+4.60%
1980	23,086	+5.32%
1990	31,266	+3.08%
1995	36,048	+2.70%
2000	39,489	+1.97%
2007	42,958	+1.17%
2010	48,501	+4.52%
2015	52,569	+1.55%
2020	56,102	+1.29%
Source: Philippine Statistics Authority[6][7][8][9]

Economy

Poverty incidence of Diffun

10 20 30 40 2000 35.60 2003 32.23 2006 23.00 2009 17.48 2012 15.76 2015 13.36 2018 10.64 2021 10.07 Source: Philippine Statistics Authority[10][11][12][13][14][15][16][17]

Government

Local government

Main article: Sangguniang Bayan

Diffun is part of the lone congressional district of the province of Quirino. It 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 in polls held every three years.

Elected officials

Members of the Municipal Council
(2019–2022)^[18]

Position	Name
Congressman	Junie E. Cua
Mayor	May G. Calaunan
Vice-Mayor	Marlito G. Corpuz
Councilors	Cesar M. Agustin
	Ma. Karen A. Baldonado-Guillermo
	Gloria C. Antolin
	Renato M. Antolin
	Elpidio G. Javonillo
	Michael A. Lidiang
	Roseller A. Escobar
	Cesar C. Valencia

Education

The Schools Division of Quirino governs the town's public education system.^[19] The division office is a field office of the DepEd in Cagayan Valley region.^[20] There are two schools district offices which govern the public and private elementary and high schools throughout the municipality. Theser are Diffun I District, and Diffun II District.^[21]

Primary and elementary schools

• Aklan Village Elementary School
• Ammogaoen Elementary School
• Andres Bonifacio Elementary School
• Baguio Village Elementary School
• Balagbag Elementary School
• Bannawag San Antonio Integrated School (Elementary)
• Bikibik Elementary School
• Cajel Elementary School
• Campamento Elementary School
• Cupianan Elementary School
• Der-an Integrated School (Elementary)
• Diego Silang Elementary School
• Diffun Central School - Integrated SPED Center (Elementary)
• Diffun West Central School
• Don Faustino Pagaduan Elementary School
• Don Mariano Perez Elementary School
• Doña Imelda Elementary School
• Dumanisi Integrated School (Elementary)
• El Elyon Learning Center
• Guinagat Elementary School
• Gulac Integrated School (Elementary)
• Guribang Elementary School
• Ifugao Village Integrated School (Elementary)
• Isidro Paredes Elementary School
• Liwanag Elementary School
• Liwayway Elementary School
• Lower Gabriela Elementary School
• Luttuad Elementary School
• Macate Elementary School
• Magsaysay Elementary School
• Maria Clara Elementary School
• Pallutan Elementary School
• Pamungyen Elementary School
• Pimentel Elementary School
• Rafael Palma Elementary School
• Ricarte Norte Elementary School
• Ricarte Sur Elementary School
• Rizal Elementary School
• San Antonio Integrated School (Elementary)
• San Isidro Integrated School (Elementary)
• San Pascual Elementary School
• Sitio Eden Elementary School
• Turayok Elementary School
• United Methodist Marvelous Kindergarten School
• Upper Gabriela Integrated School (Elementary)
• Villa Pascua Elementary School

Secondary schools

• Bannawag San Antonio Integrated School
• Der-an Integrated School
• Diffun Central School - Integrated SPED Center
• Diffun National High School
• Dumanisi Integrated School
• Gulac Integrated School
• Ifugao Village Integrated School
• Magsaysay National High School
• Quirino State University Laboratory High School
• San Antonio Integrated School
• San Isidro Integrated School
• St. Mary's Academy
• Upper Gabriela Integrated School

Higher educational institution

• Quirino State University