Gianni Ferrio (15 November 1924 – 21 October 2013) was an Italian composer, conductor and music arranger.

Born in Vicenza, Ferrio studied at conservatories of Vicenza and Venice. He started working at the end of the fifties, and was pretty active as a composer of film scores, signing about 120 sound-tracks especially for spaghetti westerns and commedie sexy all'italiana. His piece "One Silver Dollar", the main theme of the sound-track of Giorgio Ferroni's Un dollaro bucato, was later included in the sound-track of Quentin Tarantino's Inglourious Basterds.