The Ciavenasca is a breed of small domestic sheep from the province of Sondrio, in Lombardy in northern Italy. It is raised in the mountainous terrain of the Val San Giacomo, the Val Bregaglia and the Valchiavenna, from which the name of the breed derives. It is raised only for meat; the wool is of very poor quality, and the milk is sufficient only for the lambs. It is one of the forty-two autochthonous local sheep breeds of limited distribution for which a herdbook is kept by the Associazione Nazionale della Pastorizia, the Italian national association of sheep-breeders.