WGN, 720 AM, is a radio station in Chicago, Illinois, United States. The station is owned by Tribune Broadcasting (as the company's sole remaining radio station), and is one of several flagship properties owned by the locally based Tribune Media, which also owns flagship television station and the market's CW affiliate WGN-TV (channel 9), and regional cable news channel Chicagoland Television (CLTV). The station's studios are located at the Tribune Tower on Michigan Avenue in the Chicago Loop, WGN radio's transmitter is located in Elk Grove Village. Since around 1990, WGN has mainly maintained a news/talk format.