San Agustin, Surigao del Sur

San Agustin, officially the Municipality of San Agustin (Surigaonon: Lungsod nan San Agustin; Bayan ng San Agustin), is a 4th class municipality in the province of Surigao del Sur, Philippines. According to the 2020 census, it has a population of 22,855 people.

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.

Barangays
San Agustin is politically subdivided into 13 barangays. Each barangay consists of puroks while some have sitios.
 * Britania
 * Buatong
 * Buhisan
 * Gata
 * Hornasan
 * Janipaan
 * Kauswagan
 * Oteiza
 * Poblacion
 * Pong-on
 * Pongtod
 * Salvacion
 * Santo Niño