Peer Gynt, Op. 23, is the incidental music to Henrik Ibsen's 1867 play of the same name, written by the Norwegian composer Edvard Grieg in 1875. It premiered along with the play on 24 February 1876 in Christiania (now Oslo).
Grieg later created two suites from his Peer Gynt music. Some of the music from these suites has received coverage in popular culture; see Grieg's music in popular culture.