San Juan, Ilocos Sur

San Juan
Municipality of San Juan
St. John the Baptist Catholic Church
Nickname: 
Buri Capital of the Philippines
Motto: 
Tattan San Juan! (Right Now San Juan)
Map of Ilocos Sur with San Juan highlighted
OpenStreetMap
San Juan
Location within the Philippines
Coordinates: 17°44′35″N 120°27′30″E / 17.7431°N 120.4583°E / 17.7431; 120.4583
CountryPhilippines
RegionIlocos Region
ProvinceIlocos Sur
District 1st district
Named afterSt. John the Baptist
Barangays32 (see Barangays)
Government
  TypeSangguniang Bayan
  MayorMa. Elaine A. Sarmiento
  Vice MayorBenjamin V. Sarmiento
  RepresentativeDeogracias Victor B. Savellano
  Municipal Council
Members
  Electorate18,337 voters (2025)
Area
  Total
64.37 km2 (24.85 sq mi)
Elevation
41 m (135 ft)
Highest elevation
307 m (1,007 ft)
Lowest elevation
0 m (0 ft)
Population
 (2020 census)
  Total
26,674
  Density410/km2 (1,100/sq mi)
  Households
6,735
Economy
  Income class3rd municipal income class
  Poverty incidence
10.54
% (2021)
  Revenue734.4 million (2022)
  Assets2,248 million (2022)
  Expenditure417.5 million (2022)
  Liabilities139.9 million (2022)
Service provider
  ElectricityIlocos Sur Electric Cooperative (ISECO)
Time zoneUTC+8 (PST)
ZIP code
2731
PSGC
IDD:area code+63(0)77
Native languagesIlocano
Tagalog

San Juan, officially the Municipality of San Juan (Ilocano: Ili ti San Juan; Filipino: Bayan ng San Juan), formerly called as Lapog, is a municipality in the province of Ilocos Sur, Philippines. According to the 2020 census, it has a population of 26,674 people.

The town was named in honor of its patron, St. John the Baptist. As it produces the most number of goods made of buri leaf in the province, it is sometimes called the "Buri Capital of Ilocos Sur".