Star Trek 4 is the working title for an American science fiction film in development at Paramount Pictures, based on the television series Star Trek by Gene Roddenberry. It is intended to be the fourteenth film in the Star Trek film franchise and the fourth installment in the reboot series. There have been several different iterations of the film in development since 2015.

Development of a new Star Trek film following Star Trek Beyond (2016) was revealed before the release of that film, with J. D. Payne and Patrick McKay writing. In December 2017, Quentin Tarantino pitched his own idea for a new Star Trek film to producer J. J. Abrams, and development began separately from the Beyond sequel. S. J. Clarkson was hired to direct the latter in April 2018, but negotiations with stars Chris Pine and Chris Hemsworth ended that August with the actors leaving the project. Noah Hawley was hired in November 2019 to write and direct a new version of the franchise. Tarantino revealed in January 2020 that he had decided not to direct his Star Trek film.