The Susa Valley (Italian: Val di Susa; Piedmontese: Valsusa; French: Val de Suse; Occitan: Val d'Ors) is a valley in the Metropolitan City of Turin, Piedmont region of northern Italy, located between the Graian Alps in the north and the Cottian Alps in the south.

It extends over 50 kilometres (31 mi) in an east-west direction from the French border to the outskirts of Turin.

Peaks that surround the valley include: During the Roman age, Augustus formed an alliance with the Segusini of Cottii Regnum to link Italy and France by building a road through the Valley and over the Col de Montgenèvre (Passo del Monginevro), now 2 km away from the Italian border.

During the Middle Ages, the road was called Via Francigena, and pilgrims arriving from France passed through Mont Cenis and the Susa Valley on their way to Rome.

Protesters have fought a 10-year battle to prevent a 57 kilometres (35 mi) rail tunnel being built through the valley.