Al Piantadosi (born John Alberto Joseph Piantadosi; August 18, 1882 in New York City – April 8, 1955 in Encino, California) was an American composer of popular music during the heyday of Tin Pan Alley. He started out as a saloon and vaudeville pianist and rapidly flourished as a songwriter. For about ten years (from 1918 to 1928) he was an independent music publisher.