The year 1991 saw a number of significant events in radio broadcasting history.
January 11 - KKWM-FM 97.9 in Dallas/Ft. Worth becomes KLRX "Lite 97.9" after Cox assumes ownership from Anchor Media. This change will lead to a station swap nearly three years later and the demise of Tampa Bay's heritage rocker WYNF "95 YNF."
February 1 – KOZT-FM, Fort Bragg, Mendocino County, California officially becomes "THE COAST" after 48 hours straight of playing the theme from "Twin Peaks". Started (and still run) by former KLOS & KLSX programmer Tom Yates, the station has since been nominated for several Marconi awards and won one in 2002 for Rock Station of the Year.
February 8 – WROR/Boston flips to Hot AC, branded as "Mix 98.5" and adopts the new call letters WBMX.
May 17 - Philippine Catholic Radio station DZRV Radio Veritas was acquired by the Global Broadcasting Systems from the Philippine Radio Educational and Information Center, Inc, and at the same time, it started commercial operations as DZNN (known as Kaibigang Totoo (Your True Friend) and The Spirit of the Philippines). DZNN also moved its studios to Makati (later moved to Ortigas) and became home to some of the notable broadcasters such as Louie Beltran, Ramon Tulfo, Rey Langit, Jay Sonza, Orly Punzalan, Joel Reyes-Zobel and Dave Sta. Ana among others.
July - Granum Communications takes over KMEZ-FM 107.5 in Dallas/Ft. Worth from Gilmore Broadcasting and replaces its soft AC format with soft classic rock as KCDU "CD-107.5."
September 19 - KKBQ-FM (93Q) in Houston flips from CHR/Top 40 to a Country format at midnight. After a month of experimenting with the brief "Rock hits" stint, KKBQ-FM played a continuous audio sample of ocean waves. Then at 6 am KKBQ-FM completed its transition. The station would then be known as "92.9 Easy Country" for several months before ultimately becoming "93Q Country" in 1992.
October - KHYI 94.9 in Dallas/Ft. Worth drops its top-40 format of roughly 5 years (as Y-95, Power 95 and, later, simply 94.9 FM) to become KODZ "Oldies 94.9."