WJJO ("94-1 'JJO") is a radio station broadcasting at 94.1 FM in Madison, Wisconsin. (licensed to Watertown, Wisconsin). It describes itself as having an "active rock" format, targeting adults 18 to 49. WJJO is considered one of the hardest active rock radio stations in the country, and was voted #1 Rock Station in the country by the music industry in 2006 and 2007 and was the recipient of the Radio Contraband Rock Radio Award for Medium Market Radio Station of the year in both 2011, 2012 and 2013. The station is owned by Mid-West Management, Inc.
Its morning show was hosted by Johnny Danger and Greg Bair for many years. On December 22, 2006 Greg Bair left to host mornings on Mid-West's WHLK "The Lake." On Monday, November 3, 2008, Greg Bair returned to WJJO to co-host the morning show. Previous morning show hosts include Sue Peterson, Mark Elliot, and "Crash and Burns".
WJJO began broadcasting in Watertown, Wisconsin in 1961 at 104.7 MHz as WTTN-FM, moving to 94.1 in the early 1970s to allow WTKM in Hartford, Wisconsin to apply for a FM license to broadcast on 104.9. WTTN-FM and it's AM sister station WTTN-AM at 1580 kHz, simulcasted programming from 1961 until 1982, when the FM started broadcasting in stereo and became WMLW ("Mellow 94") and broadcast a soft adult-contemporary music format. WMLW also broadcast Milwaukee Brewer baseball games in the 1980's. In 1989, with a change in ownership to Joyner Communications, the station adopted a Top 40 format as 94.1 WTFX "The Fox" and moved studios to Madison, Wisconsin and the transmitter location to Deerfield, Wisconsin where it remains today. Joyner later sold the station to the current owner, Mid-West Family broadcasting. In 1991, The call letters were changed to WJJO and a classic rock format was adopted. The station later switched to its current format of Active Rock
WJJO carries an HD-2 subchannel also carrying an active rock format very similar to the HD-1 channel.