Colonel Cord McNally
John Wayne
Captain Pierre Cordona (Frenchy)
Jorge Rivero
Deputy Whitey Carter
Robert Donner
Fourth Gunman
George Plimpton
Lt. Harris
Edward Faulkner
Lt. Ned Forsythe
Peter Jason
Chuck
Chuck Courtney
Third Gunman
Robert Rothwell
Blackthorne Sheriff Pat Cronin
Bill Williams
Rio Lobo Sheriff 'Blue Tom' Hendricks
Mike Henry
Union Soldier
Jim Prejean
Hank, the hotel desk clerk
Hank Worden
Shasta Delaney
Jennifer O'Neill
Rio Lobo Deputy (uncredited)
Bob Steele
Corporal in Baggage Car
Chuck Roberson
(uncredited)
Chuck Hayward
Feeny - Bartender (uncredited)
Don 'Red' Barry
Blackthorne Prostitute (uncredited)
Sondra Currie
Bart (uncredited)
Conrad Hool
Picket (uncredited)
Lance Hool
John Hudkins
Barfly in Blackthorne (uncredited)
Michael Jeffers
Man in Army Post Saloon (uncredited)
Richard LaMarr
Phillips
Jack Elam
John McKee
Train Engineer (uncredited)
Boyd 'Red' Morgan
William H. O'Brien
Pete - Henchman (uncredited)
Gregg Palmer
Corporal in Baggage Car (uncredited)
Man Delivering Message to Jail (uncredited)
Danny Sands
Card Player (uncredited)
Cap Somers
Guitar Player in Opening Credits (uncredited)
Tommy Tedesco
Hank - Hotel Clerk (uncredited)
Seargent Tuscarora Phillips
Christopher Mitchum
Ketcham
Victor French
Maria Carmen
Susana Dosamantes
Amelita
Sherry Lansing
Dr. Ivor Jones
David Huddleston
Rio Lobo Deputy
Jim Davis
Original Music Composer
Jerry Goldsmith
Title Designer
Dan Perri
Director of Photography
William H. Clothier
Second Unit Director
Yakima Canutt
Stunt Double
Terry Leonard
Producer
Howard Hawks
Director
Screenplay
Leigh Brackett
Stunts
Hal Needham
Paul Helmick
Editor
John Woodcock
Story
Burton Wohl
Production Design
Robert Emmet Smith
Casting
Hoyt Bowers
Makeup Designer
Monty Westmore
Set Decoration
William Kiernan
Costume Design
Leah Rhodes
Sound
John R. Carter