WGN may refer to: WGN (AM), a radio station (720 AM) licensed to Chicago, Illinois, United States WGN-TV, a television station (channel 9 analog/19 digital) licensed to Chicago, Illinois, United States WGN America, a cable television network based in Chicago, Illinois, United States WFMT, a radio station (98.7 FM) licensed to Chicago, Illinois, United States, which used the call sign WGN-FM until 1954 White Gaussian noise (see also additive white Gaussian noise)… (More on Wgn)