Carolina Ferni (20 August 1839 Como – 4 June 1926 Milan) was an Italian violinist and operatic soprano.
She began her career as a violinist in Paris and Brussels, and later studied voice with famed soprano Giuditta Pasta.
In Agostino Mercuri's opera Il Violino del Diavolo, she both sang and played the violin.
Like his father, Eugenio became an operatic baritone, creating the role of Scarpia in Puccini's Tosca in 1900.
Ferni retired from the stage in 1883, and opened a singing school in Milan, and later in St. Petersburg, Russia.