The Bassarids is an opera in one act and an intermezzo, with music by Hans Werner Henze to an English libretto by W. H. Auden and Chester Kallman, after Euripides's The Bacchae.

Hans Werner Henze was a German composer. His large oeuvre is extremely varied in style, having been influenced by serialism, atonality, Stravinsky, Italian music, Arabic music and jazz, as well as traditional schools of German composition. In particular, his stage works reflect "his consistent cultivation of music for the theatre throughout his life".