WDJX (99.7 FM) is a top 40 (CHR)-formatted radio station located in Louisville, Kentucky.

When the FCC banned full-time AM-FM simulcasts in the late 1960s, WKLO-FM switched to an automated Top 40 format.

In 1981, sister WKJJ dropped the lateral replay concept as the format was changed to Country as WCII.

In addition, legendary AOR leader WLRS and Adult Contemporary turned Top 40/CHR WJYL would attempt to fill the hole for CHR in the Louisville market, and WRKA in nearby Lyndon took its short-lived Top 40 format for the Louisville market throughout 1982 and 1983 before returning to its fully operated Adult Contemporary format by 1984.

In 1994, Regent Communications (now Townsquare Media), owner of both WDJX-FM and WDJX, changed its relationship with WHKW from a LMA to a sales marketing agreement.