In music, Op. 55 stands for Opus number 55. Compositions that are assigned this number include:
Beethoven – Symphony No. 3 Brahms – Triumphlied Chopin – Nocturnes, Op. 55 Alkan - Une fusee, Op. 55 Elgar – Symphony No. 1 Glazunov – Symphony No. 5 Haydn, J. - “Tost” Quartets, Set II, Op. 55 Ippolitov-Ivanov – Turkish March Klebe – Das Märchen von der schönen Lilie Krenek – Schwergewicht Madetoja – Symphony No. 3 in A major (1926) Mendelssohn – Antigone Nielsen – Tre Motetter Prokofiev – Piano Concerto No. 5 Ries – Piano Concerto No. 3 Schumann – 5 Lieder Sibelius – Nightride and Sunrise (), tone poem for orchestra (1908) Szymanowski – Harnasie Tchaikovsky – Orchestral Suite No. 3