+3Rio Lobo

John Wayne

Col. Cord McNally

Jorge Rivero

Capt. Pierre Cordona

Jennifer O'Neill

Shasta Delaney

Jack Elam

Phillips

Christopher Mitchum

Sgt. Tuscarora Phillips

Victor French

Ketcham

Susana Dosamantes

Maria Carmen

Sherry Lansing

Amelita

David Huddleston

Dr. Ivor Jones

Mike Henry

Rio Lobo Sheriff 'Blue Tom' Hendricks

Bill Williams

Blackthorne Sheriff Pat Cronin

Jim Davis

Riley

Dean Smith

Bide

Robert Donner

Whitey Carter

George Plimpton

George, Whitey's 4th Henchman

Edward Faulkner

Lt. Harris

Peter Jason

Lt. Ned Forsythe

Chuck Courtney

Chuck, Whitey's 2nd Henchman

Robert Rothwell

Whitey's 3rd Henchman

Don 'Red' Barry

Feeny - Bartender (uncredited)