| Person | Type | Job | Role(s) |
|---|---|---|---|
 Art Cruickshank | Crew | Visual Effects | Visual Effects |
 Ben Nye | Crew | Costume & Make-Up | Makeup Artist |
 Dale Van Sickel | Crew | Crew | Stunts |
David Dockendorf | Crew | Sound | Sound |
David Silver | Crew | Production | Unit Production Manager |
Emil Kosa Jr. | Crew | Visual Effects | Visual Effects |
 Fred Steiner | Crew | Sound | Music |
 Harvey Parry | Crew | Crew | Stunts |
Herman Lewis | Crew | Sound | Sound |
Jack Martin Smith | Crew | Art | Art Direction |
L.B. Abbott | Crew | Visual Effects | Visual Effects |
Lionel Newman | Crew | Sound | Original Music Composer |
Margaret Donovan | Crew | Costume & Make-Up | Hairstylist |
 Milton Krasner | Crew | Camera | Director of Photography |
 Monte Hellman | Crew | Writing | Dialogue |
Philip M. Jefferies | Crew | Art | Art Direction |
 Roger Corman | Crew | Directing | Director, Producer |
Walter M. Scott | Crew | Art | Set Decoration |
 Wesley Barry | Crew | Directing | Assistant Director |
William B. Murphy | Crew | Editing | Editor |
Urban Thielmann | Crew | Sound | Orchestrator |
Paul Rapp | Crew | Production | Associate Producer |
Howard Browne | Crew | Writing | Screenplay |
 Alex Rocco | Cast | Actor | Diamond |
 Alexander D'Arcy | Cast | Actor | Joe Aiello |
 Barboura Morris | Cast | Actress | Jeanette Landsman (uncredited) |
 Betsy Jones-Moreland | Cast | Actress | Poolside Interviewer (uncredited) |
 Bruce Dern | Cast | Actor | Johnny May |
 Buck Taylor | Cast | Actor | Poolside Interviewer 2 (uncredited) |
Bud Cokes | Cast | Actor | Hood (uncredited) |
 Celia Lovsky | Cast | Actress | Josephine Schwimmer |
 Clint Ritchie | Cast | Actor | Jack McGurn |
 Corinna Tsopei | Cast | Actress | Gangster Girl (uncredited) |
 David Canary | Cast | Actor | Frank Gusenberg |
 Dick Miller | Cast | Actor | Gangster Dressed as a Cop (uncredited) |
Ernesto Molinari | Cast | Actor | Capone Board Member (uncredited) |
 Frank Silvera | Cast | Actor | Nick Sorello |
 George DeNormand | Cast | Actor | Clerk (uncredited) |
 George Segal | Cast | Actor | Peter Gusenberg |
Gus Trikonis | Cast | Actor | Rio |
 Harold J. Stone | Cast | Actor | Frank Nitti |
Jack Del Rio | Cast | Actor | Capone Board Member (uncredited) |
 Jack Nicholson | Cast | Actor | Gino, Hit Man (uncredited) |
James Gonzalez | Cast | Actor | Party Guest (uncredited) |
 Jan Merlin | Cast | Actor | Willie Marks |
 Jason Robards | Cast | Actor | Al Capone |
 Jean Hale | Cast | Actress | Myrtle |
 Jeffrey Sayre | Cast | Actor | Party Guest (uncredited) |
 Joan Shawlee | Cast | Actress | Edna, Frank's Girlfriend (uncredited) |
 Joe Turkel | Cast | Actor | Jake 'Greasy Thumb' Guzik |
 John Agar | Cast | Actor | Dion O'Bannion |
 Jonathan Haze | Cast | Actor | Gangster Dressed as a Cop (uncredited) |
 Joseph Campanella | Cast | Actor | Albert Wienshank |
 Ken Scott | Cast | Actor | Policeman (uncredited) |
 Kurt Kreuger | Cast | Actor | James Clark |
 Leo Gordon | Cast | Actor | Heitler |
 Leoda Richards | Cast | Actress | Party Guest (uncredited) |
 Mary Grace Canfield | Cast | Actress | Mrs. Doody, Landlady (uncredited) |
 Mary Michael | Cast | Actress | Gangster Girl (uncredited) |
Mickey Deems | Cast | Actor | Reinhold Schwimmer |
 Milton Frome | Cast | Actor | Adam Heyer |
 Monty O'Grady | Cast | Actor | Party Guest (uncredited) |
Mushy Callahan | Cast | Hood (uncredited) | |
Patrick Whyte | Cast | Actor | Judge at Party (uncredited) |
 Paul Frees | Cast | Actor | Narrator (voice) (uncredited) |
 Paul Richards | Cast | Actor | Charles Fischetti |
Phil Harron | Cast | Actor | Capone Board Member (uncredited) |
 Ralph Meeker | Cast | Actor | George Clarence 'Bugs' Moran |
 Reed Hadley | Cast | Actor | Hymie Weiss |
 Richard Bakalyan | Cast | Actor | John Scalise |
Richard Krisher | Cast | Actor | Desk Clerk (uncredited) |
 Rico Cattani | Cast | Actor | Albert Anselmi |
Ron Gans | Cast | Actor | Chapman (uncredited) |
 Ron Nyman | Cast | Actor | Hood (uncredited) |
 Russ Conway | Cast | Actor | Interrogator (uncredited) |
 Tom Reese | Cast | Actor | Ted Newberry |
 Tom Signorelli | Cast | Actor | Bobo Borotto |
 Vincent Barbi | Cast | Actor | Witness (uncredited) |
William Meader | Cast | Actor | Tenant (uncredited) |
 Charles Dierkop | Cast | Actor | Salvanti |
 Daniel Ades | Cast | Actor | Angelo Molina (uncredited) |
Sammy Shack | Cast | Actor | Vagrant (uncredited) |
Albert Cavens | Cast | Reporter (uncredited) | |
 Bernard Sell | Cast | Actor | Hood (uncredited) |
Judith Woodbury | Cast | Party Guest (uncredited) | |
José Portugal | Cast | Actor | Mourner (uncredited) |
Jerry Rush | Cast | Actor | Party Guest (uncredited) |
Lisa Jak | Cast | Actress | Gangster Girl (uncredited) |
Yutta D'Arcy | Cast | Gangster Girl (uncredited) | |
Tony Dante | Cast | Commuter (uncredited) | |
Laura Barry | Cast | Girl (uncredited) | |
Bob Brandon | Cast | Capone Board Member (uncredited) | |
Michele Guarini | Cast | Patsy Lolordo (uncredited) | |
| Person | Type | Job | Role(s) |
