The Roman Theatre is an ancient building in Aosta, north-western Italy.

It was built in the late reign of Augustus, some decades after the foundation of the city (25 BC), as testified by the presence of pre-existing structures in the area. There was also an amphitheatre, built during the reign of Claudius, located nearby.

It was restored in 2009. Since 2011, the theatre is used for music shows and theatrical performs.