Kevin Costner (Eliot Ness), Sean Connery (Jim Malone), Charles Martin Smith (Oscar Wallace), Andy García (George Stone), Robert De Niro (Al Capone), Richard Bradford (Mike), Jack Kehoe (Payne) more..., Brad Sullivan (George), Billy Drago (Nitti), Patricia Clarkson (Ness' Wife), Vito D'Ambrosio (Bowtie Driver), Steven Goldstein (Scoop), Peter Aylward (Lt. Anderson), Don Harvey (Preseuski), Robert Swan (Mountie Captain), John J. Walsh (Bartender), Del Close (Alderman), Colleen Bade (Mrs. Blackmer), Greg Noonan (Rangemaster), Sean Grennan (Cop Cousin), Larry Viverito Sr. (Italian Waiter), Kevin Michael Doyle (Williamson), Mike Bacarella (Overcoat Hood), Michael P. Byrne (Ness' Clerk), Kaitlin Montgomery (Ness' Daughter), Aditra Kohl (Blackmer Girl), Charles Keller Watson (Reporter), Larry Brandenburg (Reporter), Chelcie Ross (Reporter), Tim Gamble (Reporter), Pat Billingsley (Bailif), Sam Smiley (Bailiff), John Bracci (Fat Man), Jennifer Anglin (Woman in Elevator), Eddie Minasian (Butler), Anthony Mockus Sr. (Judge), Will Zahrn (Defense Attorney), Louie Lanciloti (Barber), Vince Viverito (Bodyguard), Valentino Cimo (Bodyguard) and others.

Art Linson (Producer), Stephen H. Burum (Director of Photography), Ennio Morricone (Original Music Composer), William A. Elliott (Art Direction), Hal Gausman (Set Decoration), Mali Finn (Casting), Gerald B. Greenberg (Editor) more..., Bill Pankow (Editor), David Mamet (Writer), Matt Johnston (Stunts), Raymond Hartwick (Associate Producer), Marilyn Vance (Costume Design), Michael Hancock (Makeup Artist), Bette Iverson (Hairstylist), Raymond Hartwick (Unit Production Manager), Glen Trotiner (Assistant Director), Gary Hymes (Stunt Coordinator), Sioux Richards (Script Supervisor), Eric Schwab (Location Manager), Kelly R. Borisy (Grip), Emile Charlap (Music Supervisor), Allen Hall (Special Effects Coordinator), George DiLeonardi (Transportation Captain), Dick Vorisek (Sound Re-Recording Mixer), Ray Hubley (Editorial Services), Robert W. Dutton (Leadman), Sam Moore (Property Master), E.C. Chen (Set Designer), Dick Hansen (Set Dressing Artist), Douglas Ryan (Camera Operator), Alex Touyarot (First Assistant Camera), Gregory Lundsgaard (Steadicam Operator), Zade Rosenthal (Still Photographer), Winnie D. Brown (Costume Supervisor), Glenn Williams (Cableman), Matthew Benjamin (Craft Service), Clay Bartholomew (Driver), Robert A. Hogan (Transportation Co-Captain), Hayden D. Anglin (Transportation Coordinator), Anne Marie Stein (Unit Publicist) and others.