 Burt LancasterRobert Stroud | Robert Stroud |
 Karl MaldenHarvey Shoemaker | Harvey Shoemaker |
 Thelma RitterElizabeth Stroud | Elizabeth Stroud |
 Neville BrandBull Ransom | Bull Ransom |
 Betty FieldStella Johnson | Stella Johnson |
 Telly SavalasFeto Gomez | Feto Gomez |
 Edmond O'BrienTom Gaddis | Tom Gaddis |
 Hugh MarloweRoy Comstock | Roy Comstock |
 Whit BissellDr. Ellis | Dr. Ellis |
 Crahan DentonKramer | Kramer |
 James WesterfieldJess Younger | Jess Younger |
 Robert BaileyReporter on Dock (uncredited) | Reporter on Dock (uncredited) |
| NNicky BlairInmate (uncredited) | Inmate (uncredited) |
| MMushy CallahanInmate (uncredited) | Inmate (uncredited) |
| JJames J. CasinoInmate (uncredited) | Inmate (uncredited) |
 Noble 'Kid' ChissellInmate (uncredited) | Inmate (uncredited) |
| JJohn IndrisanoInmate (uncredited) | Inmate (uncredited) |
 Pete KellettInmate (uncredited) | Inmate (uncredited) |
 David McMahonInmate (uncredited) | Inmate (uncredited) |
| PPat MoranInmate (uncredited) | Inmate (uncredited) |
| BBen RosemanInmate (uncredited) | Inmate (uncredited) |
| FFrankie VanInmate (uncredited) | Inmate (uncredited) |
 Robert BurtonSen. Ham Lewis (uncredited) | Sen. Ham Lewis (uncredited) |
 Lewis CharlesChaplain Wentzel (uncredited) | Chaplain Wentzel (uncredited) |
 Nick DennisCrazed Prisoner (uncredited) | Crazed Prisoner (uncredited) |
 Mike MahoneyBit Part (uncredited) | Bit Part (uncredited) |
 Raymond GreenleafJudge (uncredited) | Judge (uncredited) |
 William HansenFred Daw (uncredited) | Fred Daw (uncredited) |
 Wayne HeffleyGuard (uncredited) | Guard (uncredited) |
| MMichael MastersGuard (uncredited) | Guard (uncredited) |
