San Agustin, Surigao del Sur

San Agustin
Municipality of San Agustin
Britania Islets at the Lianga Bay in San Agustin
Nickname: 
Heart of Surigao del Sur
Map of Surigao del Sur with San Agustin highlighted
OpenStreetMap
San Agustin
Location within the Philippines
Coordinates: 8°44′37″N 126°13′17″E / 8.743664°N 126.221433°E / 8.743664; 126.221433
CountryPhilippines
RegionCaraga
ProvinceSurigao del Sur
District 1st district
Barangays13 (see Barangays)
Government
  TypeSangguniang Bayan
  MayorLibertad O. Alameda
  Vice MayorMamerta P. Milo
  RepresentativeRomeo S. Momo Sr.
  Electorate15,281 voters (2025)
Area
  Total
277.28 km2 (107.06 sq mi)
Elevation
35 m (115 ft)
Highest elevation
384 m (1,260 ft)
Lowest elevation
0 m (0 ft)
Population
 (2020 census)
  Total
22,855
  Density82/km2 (210/sq mi)
  Households
4,964
Economy
  Income class4th municipal income class
  Poverty incidence
34.65
% (2021)
  Revenue260.8 million (2022)
  Assets260 million (2022)
  Expenditure225.4 million (2022)
  Liabilities81.63 million (2022)
Service provider
  ElectricitySurigao del Sur 2 Electric Cooperative (SURSECO 2)
Time zoneUTC+8 (PST)
ZIP code
8305
PSGC
IDD:area code+63(0)86
Native languagesSurigaonon
Agusan
Cebuano
Kamayo
Tagalog
Websitewww.sanagustin.info

San Agustin, officially the Municipality of San Agustin (Surigaonon: Lungsod nan San Agustin; Tagalog: Bayan ng San Agustin), is a municipality in the province of Surigao del Sur, Philippines. According to the 2020 census, it has a population of 22,855 people.

It was established as the municipality of Oteiza on June 16, 1962, by virtue of Republic Act No. 3489, from the municipality of Marihatag; it acquired its current name on June 17, 1967, by virtue of Republic Act No. 4903.

The town is famous for the Britania Group of Islands (or simply Britania Islets), a group of 24 islands with white sandbar beaches scattered across waters of the Lianga Bay, overlooking the Philippine Sea.