Colonel Cord McNally

John Wayne

Capt. Pierre Cordona aka Frenchy

Jorge Rivero

Shasta Delaney

Jennifer O'Neill

Phillips

Jack Elam

Seargent Tuscarora Phillips

Christopher Mitchum

Ketcham

Victor French

Maria Carmen

Susana Dosamantes

Sheriff "Blue" Tom Hendricks

Mike Henry

Amelita

Sherry Lansing

Dr. Ivor Jones

David Huddleston

Blackthorne Sheriff Pat Cronin

Bill Williams

Rio Lobo deputy

Jim Davis

Lt. Harris

Edward Faulkner

Deputy Whitey Carter

Robert Donner

George, Whitey's 4th Henchman

George Plimpton

Bide (Rio Lobo rancher)

Dean Smith

Lt. Ned Forsythe

Peter Jason

Chuck, Whitey's 2nd Henchman

Chuck Courtney

Whitey's 3rd Henchman

Robert Rothwell

Union Soldier (uncredited)

Jim Prejean

Rio Lobo Deputy (uncredited)

Bob Steele

Train engineer (uncredited)

Boyd Morgan

Feeny - Bartender (uncredited)

Don 'Red' Barry

Train Engineer

Boyd 'Red' Morgan

Hank (hotel clerk) (uncredited)

Hank Worden

Blackthorne Prostitute (uncredited)

Sondra Currie

(uncredited)

Chuck Hayward

Bart (uncredited)

Conrad Hool

Corporal in Baggage Car (uncredited)

Chuck Roberson

Machinist

William Byrne

Picket (uncredited)

Lance Hool

Rio Lobo Deputy (uncredited)

John Hudkins

(uncredited)

Anthony Sparrow Hawk

Barfly in Blackthorne (uncredited)

Michael Jeffers

(uncredited)

Charlie Longfoot

Minor Role (uncredited)

Frank Kennedy

Man in Army Post Saloon (uncredited)

Richard LaMarr

Rio Lobo Deputy (uncredited)

John McKee

(uncredited)

Stanley Corson

Man in Army Post Saloon (uncredited)

William H. O'Brien

Blackthorne Prostitute

Sandra Curie

Pete - Henchman (uncredited)

Gregg Palmer

Man (uncredited)

Rudy Robbins

Man Delivering Message to Jail (uncredited)

Danny Sands

(uncredited)

Harold Cops

Jennifer Oneill

Card Player (uncredited)

Cap Somers

José Ángel Espinosa 'Ferrusquilla'

Guitar Player in Opening Credits (uncredited)

Tommy Tedesco

Boy (uncredited)

Ethan Wayne

John R. McKee