The Fassa Valley (Ladin: Fascia, Italian: Val di Fassa, German: Fassatal) is a valley in the Dolomites in Trentino, northern Italy. As an administrative valley community (Italian: Comunità di valle, German: Talgemeinschaft) of Trentino, it is called Region Comun General de Fascia.
The valley is the home of the Ladin community in Trentino, which make up the majority of the population.
The municipalities in the valley include (Ladin name):