Five Nights at Freddy's 4 is an indie survival horror video game developed and published by Scott Cawthon. It is the fourth installment of the Five Nights at Freddy's series. The game takes place in the bedroom of a child, where the player must avoid attack by nightmarish versions of the animatronics from the first game.

The game was announced in mid-2015 under the working title Five Nights at Freddy's: The Final Chapter. It was originally planned for release on October 31, 2015, however the game was pushed forward to August 8, then to July 23 when it was unexpectedly released on Steam. It was released for Android devices on July 25, 2015, and for iOS devices on August 3, 2015. A Nintendo Switch, PlayStation 4 and Xbox One port was released on November 29, 2019.

Upon release, the game received polarizing reviews from critics; praise centered on its unsettling atmosphere, while many were divided over the game's mechanics. Five Nights at Freddy's 4 is the only game in the entire Five Nights at Freddy’s series that features no spoken dialogue. The game was followed by Five Nights at Freddy's: Sister Location, released on October 7, 2016.