In music, Op. 61 stands for Opus number 61. Compositions that are assigned this number include:

Beethoven – Violin Concerto Britten – Sechs Hölderlin-Fragmente Chopin – Polonaise-Fantaisie Dvořák – String Quartet No. 11 Elgar – Violin Concerto Giuliani - Grand Overture Rautavaara – Cantus Arcticus Saint-Saëns – Violin Concerto No. 3 Sallinen – Kullervo Schumann – Symphony No. 2 Shostakovich – Piano Sonata No. 2 Spohr – String Quartet No. 18 Tchaikovsky – Orchestral Suite No. 4 Mozartiana