Ilocos Sur

Ilocos Sur
Clockwise from the top: Santa Maria Basilica, Vigan City, Bantay Church, Mount Tuwato, Bantay Church Belltower
Nickname: 
The Heritage Haven of the North
Location in the Philippines
OpenStreetMap
Coordinates: 17°20′N 120°35′E / 17.33°N 120.58°E / 17.33; 120.58
CountryPhilippines
RegionIlocos Region
FoundedFebruary 2, 1818
CapitalVigan
Largest cityCandon
Government
  GovernorJeremias C. Singson (NPC/Bileg)
  Vice GovernorRyan Luis V. Singson (Lakas/Bileg)
  LegislatureIlocos Sur Provincial Board
Area
  Total
2,596.00 km2 (1,002.32 sq mi)
  Rank51st out of 81
Highest elevation
(Mount Camingingel)
2,371 m (7,779 ft)
Population
 (2020 census)
  Total
706,009
  Rank43rd out of 81
  Density270/km2 (700/sq mi)
   Rank33rd out of 81
Demonyms
  • Ilocano (m/n)
  • Ilocana (f)
Divisions
  Independent cities0
  Component cities
  Municipalities
  Barangays768
  DistrictsLegislative districts of Ilocos Sur
Time zoneUTC+8 (PST)
ISO 3166 codePH-ILS
Spoken languages
HDI 0.70 (High)
HDI rank19th (2019)
Websitemis.ilocossur.gov.ph

Ilocos Sur (lit.'Ilocos South'), officially the Province of Ilocos Sur (Ilocano: Probinsia ti Ilocos Sur; Tagalog: Lalawigan ng Ilocos Sur), is a province in the Philippines located in the Ilocos Region in Luzon. Located on the mouth of the Mestizo River is the capital of Vigan, while Candon is the most-populous city. Ilocos Sur is bordered by Ilocos Norte and Abra to the north, Mountain Province to the east, La Union and Benguet to the south and the West Philippine Sea to the west.

Ilocos Sur was established in 1818 when the province of Ilocos was split into two: the north (now Ilocos Norte) and the south (Ilocos Sur). At that time, it included parts of Abra and the upper half of present-day La Unión. The current boundaries of the province set in March 1917 by virtue of Act No. 2683.

The province is home to two UNESCO World Heritage Sites, namely, the Heritage City of Vigan and the Santa Maria Basilica.