In music, Op. 47 stands for Opus number 47. Some compositions assigned this number:

• Beethoven's Violin Sonata No. 9
• Chopin's Ballade No. 3 in A♭ major
• Saint-Saëns's Samson and Delilah
• Elgar's Introduction and Allegro for Strings
• Albéniz's Suite Española No. 1
• Sibelius's Violin Concerto in D minor
• Bruch's Kol Nidrei
• Schumann's Piano Quartet in E♭ major
• Tchaikovsky's 7 Romances
• Schönberg's Phantasy for Violin and Piano
• Dvorák's Bagatelles

• First Battle of Lida
• First Battle of Marengo (1799)
• First Battle of Maryang San
• First Battle of Morlancourt
• First Battle of Mubo
• First Battle of Mysunde
• First Battle of Nepheris
• First Battle of Newtonia Historic District
• First Battle of Ramadi
• First Battle of San Salvador
• First Battle of Savanur
• First Battle of Sephoris
• First Battle of Sepphoris
• First Battle of Smolensk
• First Battle of Svensksund
• First Battle of Taku Forts
• First Battle of the Alps
• First Battle of the Bull Run
• First Battle of the Jiu Valley
• First Battle of the Piave
• First Battle of the Shaer gas field
• First Battle of the Weldon Railroad
• First Battle of Tobago
• First Battle of Tuyutí
• First Battle of Ulrichen