CKDK-FM is a Canadian radio station owned by Corus Entertainment, and is licensed to the city of Woodstock, Ontario.

It serves the London market, with transmitter power of 51,000 watts on the assigned frequency of 103.9 MHz, covering most of Southwestern Ontario.

Tatham and Charles Perry applied for an FM licence at Woodstock as CKOX-FM.

On January 12, 2000, CKDK and sister station CFHK-FM in St. Thomas, swapped formats, but not call letters.

On September 25, 2012, Shaw received CRTC approval to change the authorized contours of the english-language commercial radio programming undertaking CKDK Woodstock by relocating its transmitter site, by decreasing the average effective radiated power from 52,000 to 51,000 watts and by increasing its effective height of antenna above average terrain from 133 to 138.4 metres.