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
Interactive map of San Juan
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
 • RepresentativeRonald Singson
 • Municipal Council
Members
  • Rizalina A. Valle
  • Cresencio G. Valle
  • Gem Paula V. Lucero
  • Michael B. Sumagit
  • Edwin B. Singzon
  • Rafael Vincent P. Ochosa
  • Florante A. Ramos
  • Domingo M. Oli
 • 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
 (2024 census)
 • Total
26,709
 • Density414.9/km2 (1,075/sq mi)
 • Households
6,735
Economy
 • Income class3rd municipal income class
 • Poverty incidence
10.54
% (2021)
 • Revenue₱ 734.4 million (2022)
 • Assets₱ 2,248 million (2022)
 • Expenditure₱ 417.5 million (2022)
 • Liabilities₱ 139.9 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 2024 census, it has a population of 26,709 people.

The town produces the most number of goods made of buri leaf in the province. it is recognized sometimes as the "Buri Capital of Ilocos Sur".