- One Fine Day (1996)
- One Flew Over the Cuckoo's Nest (1975)
- One for the Money (2012)
- One Girl's Confession (1953)
- One Good Cop (1991)
- One Good Turn (1996)
- One Hour Photo (2002)
- One Hour with You (1932)
- One Hundred and One Dalmatians (101 Dalmatians) (1961)
- One in the Chamber (2012)
- One Kine Day (2011)
- One Last Deal (2018)
- One Last Thing (2018)
- One Less God (2017)
- One Life (2011)
- One Little Indian (1973)
- One Magic Christmas (1985)