- The Outlaw Josey Wales (1976)
PG | Western
- One-Eyed Jacks (1961)
NR | Drama/Western
- Outlaw Express
NR | Western
- Oklahoma Cyclone (1930)
NR | Western
- Oath of Vengeance
NR | Western
- The Ox-Bow Incident (1943)
NR | Western
- The Over-the-Hill Gang Rides Again (1970)
NR | Comedy/Western
- The Outcast (1954)
NR | Western
- Old Henry (2021)
NR | Western
- The Outlaw Stallion
NR | Western
- The Oklahoma Kid (1939)
NR | Western
- Oklahoma Annie
NR | Comedy/Western
- Outlaws of the Desert (1941)
NR | Western