JACK FM was an adult hits format radio station that broadcast on 106.8 MHz FM in Oxford, Oxfordshire, United Kingdom, and on DAB in Oxfordshire. Between 2016 and 2017 it also broadcast in Surrey and parts of Hampshire. The station shared premises in Eynsham, Oxfordshire, with its sister stations JACK 2 and JACK 3. As of September 2023, the station broadcast to a weekly audience of 55,000, according to RAJAR. The station closed at 22:00 on 29th October 2023 following the acquisition of the FM frequencies by Bauer to become part of the Greatest Hits Radio network. ()