Star Trek: New Voyages, known from 2008 until 2015 as Star Trek: Phase II, is a fan-created science fiction webseries set in the fictional Star Trek universe. The series was designed as a continuation of the original Star Trek (aka ST:TOS or just TOS), beginning in the fifth and final year of the starship Enterprise's "five-year mission." The first episode was released in January 2004, with new episodes released at a rate of about one per year. Production on new episodes halted in June 2016 following the release of new fan film guidelines by CBS/Paramount after they sued the makers of Star Trek: Axanar, with three episodes in post-production left unreleased. The sets constructed for New Voyages were licensed as a 'Studio Set Tour' beginning in July 2016.

The series was the first such show with extensive standing sets, and that it has attracted the talents of a number of professional writers and actors associated with official Star Trek productions, including George Takei reprising his role as Sulu in "World Enough and Time", and Walter Koenig as Chekov in "To Serve All My Days". Eugene Roddenberry Jr., the son of Star Trek creator Gene Roddenberry, served as consulting producer.

The show's episode "World Enough and Time" was nominated for the Hugo Award for Best Dramatic Presentation, Short Form in 2008, alongside episodes of Doctor Who, Torchwood, and Battlestar Galactica, but lost to the Doctor Who episode "Blink."