Diffun

Diffun
Municipality of Diffun
Diffun Town Hall
Map of Quirino with Diffun highlighted
OpenStreetMap
Diffun
Location within the Philippines
Coordinates: 16°35′37″N 121°30′09″E / 16.5936°N 121.5025°E / 16.5936; 121.5025
CountryPhilippines
RegionCagayan Valley
ProvinceQuirino
District Lone district
Barangays33 (see Barangays)
Government
  TypeSangguniang Bayan
  MayorMay G. Calaunan
  Vice MayorMarlito G. Corpuz
  RepresentativeJunie E. Cua
  Municipal Council
Members
  Electorate32,761 voters (2025)
Area
  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)
  Total
56,102
  Density180/km2 (450/sq mi)
  Households
13,942
Economy
  Income class2nd municipal income class
  Poverty incidence
10.07
% (2021)
  Revenue317.3 million (2022)
  Assets790.9 million (2022)
  Expenditure240.3 million (2022)
  Liabilities225.9 million (2022)
Service provider
  ElectricityQuirino Electric Cooperative (QUIRELCO)
Time zoneUTC+8 (PST)
ZIP code
3401
PSGC
IDD:area code+63(0)78
Native languagesIlocano
Bugkalot
Tagalog
Websitewww.diffun-quirino.gov.ph

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.

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.