Mike Henry
Rio Lobo Sheriff 'Blue Tom' Hendricks
Bill Williams
Blackthorne Sheriff Pat Cronin
George Plimpton
George, Whitey's 4th Henchman
Chuck Courtney
Chuck, Whitey's 2nd Henchman
Don 'Red' Barry
Feeny - Bartender (uncredited)
Sondra Currie
Blackthorne Prostitute (uncredited)
John Hudkins
Rio Lobo Deputy (uncredited)
Michael Jeffers
Barfly in Blackthorne (uncredited)
Richard LaMarr
Man in Army Post Saloon (uncredited)
John McKee
Rio Lobo Deputy (uncredited)
Boyd 'Red' Morgan
Train Engineer (uncredited)
William H. O'Brien
Man in Army Post Saloon (uncredited)
Gregg Palmer
Pete - Henchman (uncredited)
Jim Prejean
Union Soldier (uncredited)
Chuck Roberson
Corporal in Baggage Car (uncredited)
Danny Sands
Man Delivering Message to Jail (uncredited)
Bob Steele
Rio Lobo Deputy (uncredited)
Tommy Tedesco
Guitar Player in Opening Credits (uncredited)
Hank Worden
Hank - Hotel Clerk (uncredited)