The Bayreuth Festival (German: Bayreuther Festspiele) is a music festival held annually in Bayreuth, Germany, at which performances of operas by the 19th century German composer Richard Wagner are presented. Wagner himself conceived of and promoted the idea of a special festival to showcase his own works, in particular his monumental cycle Der Ring des Nibelungen and Parsifal.

Performances take place in a specially designed theatre, the Bayreuth Festspielhaus. Wagner personally supervised the design and construction of the theatre, which contained many architectural innovations to accommodate the huge orchestras for which Wagner wrote as well as the composer's particular vision about the staging of his works. The Festival has become a pilgrimage destination for Wagner enthusiasts, who often must wait years to obtain tickets.

The origins of the Festival itself lie rooted in Richard Wagner's interest in establishing his financial independence. A souring of the relationship with his patron, Ludwig II of Bavaria, led to his expulsion from Munich, where he had originally intended to launch the festival. Wagner next considered Nuremberg, which would have reinforced the thematic significance of works such as Die Meistersinger. On the advice of Hans Richter, however, the focus fell upon Bayreuth which enjoyed three distinct advantages.