CJMX-FM (105.3 MHz) is a Canadian radio station, which broadcasts a hot adult contemporary format in Sudbury, Ontario.

After a change in CRTC media ownership rules, Pelmorex sold CJMX to Telemedia, the owner of CJRQ and CIGM, in 1998.

[3] In late April 1999, shortly after the Telemedia purchase was finalized, CJMX dropped its hot AC format in favour of a soft AC format with the "EZ Rock" branding and moved from the 493B Barrydowne studios to 880 LaSalle Boulevard Telemedia studios to join with sister stations CIGM and CJRQ-FM.

In the late 1990s and early 2000s, CJMX overtook former ratings leader CJRQ in the market, based in part on actively promoting itself as a station suitable for workplace listening.

[4] Under Rogers ownership in 2002, the station laid off several employees, including Dave Lindsay, afternoon drive time disc jockey and president of Communications, Energy and Paperworkers Union Local 725-M, which represented staff at CJMX and CHNO.

In late October 2004, a fire damaged a transmission line at the transmitter that knocked CJMX off the air for 25 hours.

[6] In 2009, CJMX's sister station CIGM was sold to Newcap Broadcasting, then moved to the FM dial in August that same year.

In July 2011, the station altered its musical format to present a more contemporary version of its AC Mainstream Plus blend.

[9] CJMX was one of four "EZ Rock" stations owned and operated by Rogers Media, all of which are located in Northern Ontario (the others being CKGB-FM Timmins, CHUR-FM North Bay, and CHAS-FM Sault Ste.