| Person | Type | Job | Role(s) |
|---|---|---|---|
 Charlie Picerni | Crew | Crew | Stunt Coordinator |
 Eugene Mazzola | Crew | Directing | Assistant Director |
 Gene Corso | Crew | Sound | Sound Effects Designer |
Héctor R. Figueroa | Crew | Camera | Camera Operator |
Jann Carver | Crew | Directing | Script Supervisor |
John C. Broderick | Crew | Production | Associate Producer |
Lowell Brown | Crew | Sound | Boom Operator |
Maurice Stein | Crew | Costume & Make-Up | Makeup Artist |
Ned Parsons | Crew | Art | Set Decoration |
Patricia Miller | Crew | Costume & Make-Up | Hairstylist |
Peter Cornberg | Crew | Production | Production Supervisor |
Richard C. Meyer | Crew | Editing | Editor |
Robert Gravenor | Crew | Sound | Sound Mixer |
 Roger Corman | Crew | Production | Producer |
Roger George | Crew | Crew | Special Effects |
Samuel C. Crutcher | Crew | Sound | Assistant Sound Editor |
 Steve Carver | Crew | Directing | Director |
Teri Schwartz | Crew | Directing | Assistant Director |
V.R. Bud Shelton | Crew | Crew | Property Master |
Vilis Lapenieks | Crew | Camera | Director of Photography |
Ward Preston | Crew | Art | Art Direction |
Robert Edesa | Crew | Camera | First Assistant Camera |
David Grisman | Crew | Sound | Music |
Howard Browne | Crew | Writing | Writer |
Steve Ferry | Crew | Crew | Property Master |
Stephen R. Ferry | Crew | Art | Property Master |
 Barbara Meyer | Crew | Editing | Assistant Editor |
Jerome L. Posner | Crew | Production | Location Coordinator |
Lee Heckler | Crew | Lighting | Lighting Director |
 Beach Dickerson | Cast | Actor | Joe Kepka |
 Ben Gazzara | Cast | Actor | Al Capone |
 Carmen Argenziano | Cast | Actor | Jack McGurn |
 Carmen Filpi | Cast | Actor | Waiter |
Chuck Traynor | Cast | Senator | |
 Dick Miller | Cast | Actor | Joe Pryor |
 Frank Campanella | Cast | Actor | Big Jim Colosimo |
 George Chandler | Cast | Actor | Robert E. Crowe |
George Milan | Cast | William H. Thompson | |
 Harry Guardino | Cast | Actor | Johnny Torrio |
Jack Ackerman | Cast | Adam Heyer | |
Jack O'Leary | Cast | Actor | Pool Hall Owner |
Jim Galante | Cast | Actor | John May |
Joe De Nicola | Cast | Charles Fischetti | |
John Armond | Cast | Actor | Second Reporter |
John C. Broderick | Cast | Actor | Maitre d' |
 John Cassavetes | Cast | Actor | Frankie Yale |
 John Davis Chandler | Cast | Actor | Hymie Weiss |
 John Finnegan | Cast | Actor | N.Y. Police Lt. |
 John Howard | Cast | Actor | Warden J. Johnston |
 John Martino | Cast | Actor | Tony Amatto |
 John Orchard | Cast | Actor | Dion O'Banion |
 Mario Gallo | Cast | Actor | Giuseppe Aiello |
 Martin Kove | Cast | Actor | Pete Gusenberg |
Pamela Toll | Cast | Actress | Mrs. Atkins |
 Peter Maloney | Cast | Actor | Jake Guzik |
 Ralph James | Cast | Actor | Judge J.H. Wilkerson |
 Redmond Gleeson | Cast | Actor | N.Y. Cop #2 |
 Robert Phillips | Cast | Actor | Bugs Moran |
 Royal Dano | Cast | Actor | Anton J. Cermak |
 Russ Marin | Cast | Actor | Joseph Stenson |
 Susan Blakely | Cast | Actress | Iris Crawford |
 Sylvester Stallone | Cast | Actor | Frank Nitti |
Tina Scala | Cast | Actress | Mrs. Torrio |
 Tony Giorgio | Cast | Actor | Antonio Lombardo |
 Vincent Barbi | Cast | Actor | Solly |
 Vincent Di Paolo | Cast | Actor | Mob Soldier (uncredited) |
Bert Conway | Cast | Frank Loesch | |
 Don McGovern | Cast | Actor | N.Y. Cop #1 |
James R. Sweeney | Cast | Actor | Prison Doctor |
John Favorite | Cast | First Reporter | |
George Engelson | Cast | Torrio's Doctor | |
Don Pulford | Cast | Actor | William Cooper |
Tom Cook | Cast | Sam Volenta | |
Angelo Grisanti | Cast | Actor | Angelo Genna |
Eugenia Stewart | Cast | Miss Detwiller | |
Laurence Hagen | Cast | Samuel Ettelson | |
 James V. Christy | Cast | Actor | Thomas Bronk |
Deborah Klose | Cast | Female Reporter | |
Ben Marino | Cast | Frank Gusenberg | |
| Person | Type | Job | Role(s) |
