San Fagondu (Spanish: San Facundo) is one of 44 parishes (administrative divisions) in Tinéu, a municipality within the province and autonomous community of Asturias, in northern Spain.

Situated at 523 m (1,716 ft) above sea level, it is 12.81 km² (4.95 sq mi) in size, with a population of 210 (INE 2004). The postal code is 33875.

• Bárzana
• Barzanicas
• Cerviáu
• La Cueta
• Mirayu d'Arriba
• Pondusén
• San Fagondu
• Viḷḷacín

43°17′00″N 6°31′00″W / 43.2833°N 6.5167°W / 43.2833; -6.5167