Johnny Torrio, Italian-American mob boss (d. 1957)
John Donato Torrio (born Donato Torrio, Italian: [doˈnaːto ˈtɔrrjo]; January 20, 1882 – April 16, 1957) was an Italian-American mobster who helped build the Chicago Outfit in the 1920s. It was later inherited by his protégé Al Capone. Torrio proposed a National Crime Syndicate in the 1930s and later became an adviser to Lucky Luciano and his Luciano crime family.

Torrio had several nicknames, primarily "The Fox" for his cunning and finesse. The US Treasury official Elmer Irey considered him "the biggest gangster in America" and wrote, "He was the smartest and, I dare say, the best of all the hoodlums. 'Best' referring to talent, not morals". Virgil W. Peterson of the Chicago Crime Commission stated that his "talents as an organizational genius were widely respected by the major gang bosses in the New York City area". Crime journalist Herbert Asbury affirmed: "As an organizer and administrator of underworld affairs, Johnny Torrio is unsurpassed in the annals of American crime; he was probably the nearest thing to a real mastermind that this country has yet produced".