| Clint Eastwood | ... | Marshal Jed Cooper |
| Inger Stevens | ... | Rachel Warren |
| Ed Begley | ... | Captain Wilson, Cooper Hanging Party |
 | Pat Hingle | ... | Judge Fenton |
| Ben Johnson | ... | Marshal Dave Bliss |
| Charles McGraw | ... | Sheriff Ray Calhoun, Red Creek |
| Ruth White | ... | Madame 'Peaches' Sophie |
| Bruce Dern | ... | Miller, One of the 3 rustlers, and murderer |
| Alan Hale Jr. | ... | Matt Stone, Cooper Hanging Party |
| Arlene Golonka | ... | Jennifer, the Prostitute |
| James Westerfield | ... | Prisoner |
| Dennis Hopper | ... | The Prophet |
| L.Q. Jones | ... | Loomis, Cooper Hanging Party |
| Michael O'Sullivan | ... | Francis Elroy Duffy, Prisoner |
| Joseph Sirola | ... | Reno, Cooper Hanging Party |
| James MacArthur | ... | The Preacher |
| Bob Steele | ... | Jenkins, Cooper Hanging Party |
| Bert Freed | ... | Schmidt, the Hangman |
| Russell Thorson | ... | Maddow, Cooper Hanging Party (as Russell Thorsen) |
| Ned Romero | ... | Charlie Blackfoot, Cooper Hanging Party |
| Jonathan Lippe | ... | Tommy, Cooper Hanging Party |
| Richard Gates | ... | Ben, Billy Joe's Brother (as Rick Gates) |
| Bruce Scott | ... | Billy Joe, Ben's Brother |
| Richard Guizon | | |
| Tod Andrews | ... | Defense Attorney |
| Mark Lenard | ... | Prosecutor |
| Roy Glenn | ... | Guard |
| Paul Sorensen | ... | Reno (as Paul Sorenson) |
| Richard Angarola | | |
| Larry J. Blake | ... | Drinking Spectator-to-Be (as Larry Blake) |
| Ted Thorpe | | |
| Robert Jones | | |
| Barry Cahill | | |
| John Wesley | | |
| Dennis Dengate | | |
| Bill Zuckert | ... | Sheriff |
| Hal England | | |
| Robert Williams | ... | Elwood, the Gravedigger (as Robert B. Williams) |
| Tony Di Milo | | (as Tony di Milo) |
| rest of cast listed alphabetically: |
| John Cochran | ... | Jailer (uncredited) |
| Herbert Ellis | ... | Swede (uncredited) |
| Joel Fluellen | ... | Prisoner wagon driver (uncredited) |
| Jack Ging | ... | Marshal Hayes (uncredited) |
