Santiago de Piães is a Portuguese civil parish (freguesia) in the municipality of Cinfães.

[2] The parish contains the localities Cosconhe, Crasto, Lage, Santiago de Piães, Santo António, Sanfins, Ventoselas and Vilar d'Arca.

The presence of primitive tribes in this region is reflected in the local toponymy (such as Castro, Cristelo, Cabruela and Concela).

[3] Similarly, the Roman occupation is reflected in nuclei such as Vilar de Arca, Cimo de Vila, Cabo de Vila, Vila Verde, Vila de Antomil, Casal Joane, Casal Seco a Póvoa, while Moorish influence is reflected in Outeiro do Mouro and Lapa da Moura, and Christian influences in Sanfins (São Felix), Santa Comba and São Pedro a São Martinho (reflecting the influences of these groups).

[3] Before the 12th century, Santiago de Piães was the centre of the medieval magistrium in Sanfins(San Fiiz or Sancti Felicis).