KFUO (850 kHz) is a non-commercial AM radio station licensed to Clayton, Missouri and serving Greater St. Louis. It has a Christian talk and teaching radio format. KFUO is one of the oldest continuous operating Christian radio stations in the United States, with its first broadcast on October 26, 1924. Owned and operated by The Lutheran Church–Missouri Synod (LCMS), its radio studios and offices are in the LCMS headquarters in Kirkwood, Missouri.