- One Way (2006)
- One Way Passage (1932)
- One Week (2008)
- One Week Job (2010)
- One Wild Oat (1951)
- One Winter Weekend (2018)
- One, Two, Many (2008)
- One, Two, Three (1961)
- One-Armed Boxer (1972)
- One-Eyed Jacks (1961)
- Oneechanbara: The Movie (2008)
- Ong Bak 2 (2008)
- Ong Bak 3 (2010)
- Ong-bak (2003)
- Onibaba (1964)
- Onion Field, The (1979)
- Onion Movie, The (2008)