Sariego (Asturian: Sariegu) is a municipality in the Autonomous Community of the Principality of Asturias, Spain. It is bordered on the north by Gijón and Villaviciosa, on the east by Villaviciosa, Nava and Cabranes, on the south by Siero and Nava, and on the west by Siero. The source of the Nora River is within the municipality.The principal holidays are that of Santiago (the weekend before July 25) and San Pedrín de la Cueva (the third Sunday in August).