- 4 Days (2016)
- 4 for Texas (1963)
- 4 Inyong shiktak (Uninvited) (2003)
- 4 latas (2019)
- 4 mosche di velluto grigio (The Four Velvet Flies AKA 4 Flies on Grey Velvet) (1971)
- 4 Phone Calls From Amelia (2018)
- 4.3.2.1 (2010)
- 4/20 Massacre (2018)
- 40 Days and 40 Nights (2002)
- 40 Days and Nights (2012)
- 40 Guns to Apache Pass (1967)
- 40 Year Old Virgin, The (2005)
- 400 Days (2015)
- 404 (2011)
- 407 Dark Flight 3D (2012)
- 42 (2013)
- 42 Seconds Of Happiness (2016)