KXFN (1380 AM) is a radio station in St. Louis, Missouri. It is owned by Relevant Radio, Inc. and airs an English language Catholic format. The station has a colorful history as a Top 40 station KWK. KXFN employs separate daytime and nighttime transmitter sites; the daytime transmitter is located on Chouteau Island near Granite City, Illinois, while the nighttime site is located further south near Dupo, Illinois. Listeners in St. Louis and its adjacent communities can also hear KXFN programming on an FM translator station, 105.3 K287BY.