Quirós is a municipality in the Autonomous Community of the Principality of Asturias, Spain. To the southeast is the municipality of Lena, to the south lies the Autonomous Community of León, to the northeast Riosa and Morcín, to the north is Santo Adriano, to the northwest is Proaza, and to the west is Teverga. Castillo de Alba was a notable fortress here in medieval times, today in ruins.