Naguilian, La Union

Naguilian
Municipality of Naguilian
Naguilian Municipal Hall, Downtown proper and Naguilian or Balili River
Nicknames: 
The True Heart of La Union
Home of the Original Basi
Motto: 
Tattan Naguilian!
Map of La Union with Naguilian highlighted
Interactive map of Naguilian
Naguilian
Location within the Philippines
Coordinates: 16°32′N 120°24′E / 16.53°N 120.4°E / 16.53; 120.4
CountryPhilippines
RegionIlocos Region
ProvinceLa Union
District 2nd district
FoundedFebruary 18, 1839
Barangays37 (see Barangays)
Government
 • TypeSangguniang Bayan
 • MayorHon. Nieri T. Flores
 • Vice MayorHon. Reynaldo J. Flores
 • RepresentativeHon. Dante S. Garcia
 • Municipal Council
Members
  • Ruperto A. Rillera Jr.
  • Diomedes F. Hipol
  • Georgina F. Estepa-Flores
  • Helen C. Obispo
  • Danilo T. Soriano
  • Hulgar Redentor R. Rimando
  • Aurelio F. Flora
  • Roger A. Floresca
 • Electorate36,646 voters (2025)
Area
 • Total
104.60 km2 (40.39 sq mi)
Elevation
95 m (312 ft)
Highest elevation
495 m (1,624 ft)
Lowest elevation
7 m (23 ft)
Population
 (2024 census)
 • Total
53,443
 • Density510.93/km2 (1,323.3/sq mi)
 • Households
12,915
DemonymNaguilianon
Economy
 • Income class1st municipal income class
 • Poverty incidence
9
% (2021)
 • Revenue PHP 307,477,249.26 million (28.02%) (2022)
 • Assets PHP 1,153,571,103.05 billion (25.73%) (2022)
 • Equity PHP 947,824,505.09 million (17.71%) (2022)
 • Expenditure PHP 166,800,843.74 million (20.64%) (2022)
 • Liabilities PHP 205,746,597.96 million (83.33%) (2022)
Service provider
 • ElectricityLa Union Electric Cooperative (LUELCO)
Time zoneUTC+8 (PST)
ZIP code
2511
PSGC
IDD:area code+63 (0)72
Native languagesIlocano
Tagalog
Major religionsRoman Catholic
Patron saintSaint Augustine of Hippo
Notable FestivalBasi Festival
Websitenaguilianlu.gov.ph

Naguilian, officially the Municipality of Naguilian (Ilocano: Ili ti Naguilian; Filipino: Bayan ng Naguilian), is a municipality in the province of La Union, Philippines. According to the 2024 census, it has a population of 53,443 people.

It is renowned as the Home of the Original Basi, a traditional fermented sugarcane wine. Naguilian is located at the geographical center of La Union and has a total land area of 10,086.85 hectares, making it the third-largest among the 19 towns and cities in the province. As of 2020, the town has 36,150 registered voters.