Die Feen is an opera in three acts by Richard Wagner. The German libretto was written by the composer after Carlo Gozzi's La donna serpente. Die Feen was Wagner's first completed opera, but remained unperformed in his lifetime. It has never established itself firmly in the operatic repertory although it receives occasional performances, on stage or in concert, most often in Germany. The opera is available on CD and in a heavily cut, adapted-for-children version, DVD.

Wilhelm Richard Wagner was a German composer, theatre director, polemicist, and conductor who is chiefly known for his operas. Unlike most opera composers, Wagner wrote both the libretto and the music for each of his stage works. Initially establishing his reputation as a composer of works in the romantic vein of Carl Maria von Weber and Giacomo Meyerbeer, Wagner revolutionised opera through his concept of the Gesamtkunstwerk, by which he sought to synthesise the poetic, visual, musical and dramatic arts, with music subsidiary to drama. He described this vision in a series of essays published between 1849 and 1852. Wagner realised these ideas most fully in the first half of the four-opera cycle Der Ring des Nibelungen.