Frank McErlane (1894–1932) was a Prohibition-era Irish-American organized crime figure. He led the Saltis-McErlane Gang, allied with Rusyn American gangster Joseph Saltis and the Johnny Torrio-Al Capone led Chicago Outfit, against rival Irish-American bootleggers, the Southside O'Donnell Gang. He is credited with introducing the Thompson submachine gun to Chicago's underworld. The Illinois Crime Survey called him "the most brutal gunman who ever pulled a trigger in Chicago."