The year 1993 in radio involved some significant events.
The Quad Cities' KSTT call letters are retired as 1170 AM is given the new call sign KJOC, reflecting that station's all-sports format. The station has been simulcasting WXLP's FM signal for the past four years, although its sports programming has been steadily increasing during this time.
19 February - KBEQ/Kansas City drops its top-40 format of 20 years as "Q-104" to go country as "Young Country 104." It will initially be simulcast on KBZR 1030, which has been airing Z-Rock. The "Q-104" handle will return a few years later, but the format will remain country.
Cleveland-based Malrite Communications announces it will merge with Shamrock Broadcasting. The merger will be completed in August.
8 March - KKNB/Lincoln signs on with a modern rock format.
10 March -
12 March - After 10 years in the Top 40/CHR format (with a few moniker and format modifications), WEGX/Philadelphia becomes smooth jazz-formatted WJJZ. Three days later, struggling ACWKSZ fills the format void by flipping to "Z100." However, due to the presence of nearby WHTZ in New York (which is also located on 100.3 FM), the "Z100" moniker will be modified to "Y100".
Two stations in Syracuse flip to country within two days of each other: Beautiful Music-formatted WRHP flips today, while classic rock-formatted WKFM flips the next day.
19 April - WAQZ/Cincinnati flips from album rock to modern rock.
30 April - Virgin Radio, originally called Virgin 1215, is launched nationally in the United Kingdom on 1215 kHz at 12.15pm by Richard Branson. It subsequently becomes the most listened-to online radio station in the world.
28 May - At 4 PM, WOWF/Detroit drop their 5-month old talk format and flip to country, becoming one of the first "Young Country" stations.
3 June - Atlantic Ventures, Stoner Broadcasting and Multi Market Communications all merge to form American Radio Systems, consisting of 16 stations in 7 markets.
9 September - Cox and CBS make a swap involving the Dallas and Tampa radio markets. Cox receives AOR WYNF 94.9 "95 YNF" in Tampa from CBS to pair with its WWRM "Warm 107.3", while CBS receives KLRX "Lite 97.9" in Dallas from Cox to pair with its KTXQ "Q-102." KLRX flips to classic rock as KRRW "Arrow 97.9" on 15 October (becoming the second station to use that branding), while Cox moves the "Warm" format from 107.3 to 94.9 and launches 1970s hits WCOF "107.3 The Coast."
10 September - CBS installs the very first 70s-based classic hits-formatted "Arrow" station on KCBS-FM/Los Angeles, who drop their 4-year old oldies format.
Memphis gets its sixth urban-formatted station when WOGY-AM drops the simulcast with its FM sister station and flips to urban oldies as "The Juice", WJCE.
Carl Hirsch launches his new radio group venture, OmniAmerica Communications.
Westwood One announces it will acquire Unistar Radio Networks for $101.3 million; in addition, Westwood One will sell a 25% equity stake to Infinity Broadcasting for $15 million.
KPOI/Honolulu flips from album rock to modern rock.
25 October - Smooth jazz-formatted KHIH/Denver flips to religious programming; the format void will be filled by AC-formatted KHOW-FM a few days later.
WWKS/Pittsburgh flips from classic rock to hard rock.
Booth American Company and Broadcast Alchemy announce plans of a merger, with the newly combined company getting 11 stations in 7 markets and $160 million. In addition, Metroplex Communications will merge with Clear Channel, a deal worth $53 million.
10 November - KQBR/Sacramento drops country for smooth jazz
12 November - After 23 years in the country format, KLAC/Los Angeles flips to Unistar's adult standards "AM Only" format.
19 November - The "Arrow" format is expanded to two adult contemporary-formatted stations in two markets; in Washington, D.C., WLTT adopts the format, while in Houston, KLTR flips to the format four days later.