- not to be confused with San Tirso
San Tirso de Abres (Eonavian: Santiso d'Abres) is a municipality in the Autonomous Community of the Principality of Asturias, Spain. It is bordered on the north, south, and west by Lugo province of Galicia, and on the east by the municipalities of Taramundi and Vegadeo. It is the easternmost province in Asturias.
The municipality consists of only one parish, San Salvador. It is one of Eonavian speaking councils of Asturias