CHJJ-FM (90.7 MHz) is a listener-supported non-commercial station in Cobourg, Ontario. It broadcasts a contemporary Christian music format and is owned by United Christian Broadcasters of Canada (UCB). Most programming is simulcast with co-owned 102.3 CKJJ-FM Belleville.

In 2007, the station originally began operating as a rebroadcaster of CKJJ-FM Belleville, Ontario. The new Cobourg station was on 100.9 FM with 42 watts of power, using the call sign CKJJ-FM-1.^[1]

On January 26, 2010, UCB was denied a licence by the Canadian Radio-television and Telecommunications Commission to change CKJJ-FM-1's frequency to 90.7 MHz.^[2] They would apply for it again on September 27, 2010,^[3] this time receiving approval on February 21, 2011,^[4] after the original repeater was forced to close down following the launch of CIYM-FM 100.9 in Brighton.

CHJJ-FM began on-air tests at 90.7 FM in December 2011 and officially launched on September 8, 2012.