- Country: Italy, Spain, West Germany
- Genres: Western
- Release: 1965-03-11
- Director: Jaime Jesús Balcázar , Roberto Bianchi Montero
- Writers: Alfonso Balcázar , Helmut Harun , Giuseppe Maggi
- Language: Spanish | German | Italian
- Stars: Richard S. Hornbeck , Richard S. Hornbeck , José Calvo , Sabine Bethmann , Tom Felleghy , Karl-Otto Alberty , Jesús Puche , George Herzig , Fernando Rubio , Leontine Snell , Eduardo Lizarza
- Runtime: 81 min
- Awards: N/A
- AKA: Oklahoma John (Brazil) , Oklahoma John , Der Sheriff von Rio Rojo , Ranch of the Ruthless (United States of America) , The Man from Oklahoma (United States of America) , Alçaklar affedilmez (Turkey) , O Homem de Oklahoma (Portugal, Portuguese Republic) , Oklahoma Colt (Greece) , Oklahoma John (Spain) , Violence à Oklahoma (France, French Republic) , Il ranch degli spietati (Italy)
- Plot: Oklahoma Dan is sent into a small town ruled by the ruthless ranch hands of Rod Edwards. Danger abounds, as the last sheriff was murdered by Edward's son Jim and foreman Hondo. Oklahoma calmly handles each threat as he fights to bring the evidence to light. Oklahoma vows to find the murderer of Miss White's father.
- IMDB:tt0059536
Ranch of the Ruthless Cast · · · ALL
Jaime Jesús Balcázar
Director
Roberto Bianchi Montero
Director
José Calvo
Ron Edwards
Giuseppe Addobbati
Ken Hogg
Sabine Bethmann
Georgina White
Tom Felleghy
Steve Watson
Karl-Otto Alberty
Hondo
Jesús Puche
Cruck