Paranormal Activity: The Ghost Dimension is a 2015 American 3D found footage supernatural horror film directed by Gregory Plotkin in his directorial debut, and written by Jason Harry Pagan, Andrew Deutschman, Adam Robitel, and Gavin Heffernan. Plotkin served as the editor for the second, third, fourth, and fifth films. Most of the film takes place after Paranormal Activity 4 (2012), though the plot ties in heavily with the events of Paranormal Activity 3 (2011).

It is the sixth installment in the Paranormal Activity series. It was released on October 23, 2015. It is the first installment not to star Katie Featherston as Katie, but she is referred to often. Most of the film involves the young 1988 Katie from the third film. The film had grossed over $78 million worldwide on a $10 million budget. The Rotten Tomatoes consensus says that the franchise's "thrills are mostly gone". Although this film was initially announced and promoted as the final film in the series, a seventh installment was released in October 2021.