KGRR (97.3 FM) is a radio station broadcasting a mainstream rock format to the Dubuque, Iowa, USA area. The station is licensed to Radio Dubuque, Inc. Its transmitter is located alongside U.S. Highway 20 between Dubuque and Peosta on top of the U.S. 20 Bluff. KGRR was used as the radio station call letters in an episode of 'The Twilight Zone' Nightsong (TV episode 1986 #2.6).