KFUO (850 AM) is a Christian radio station in St. Louis County, Missouri. It can be heard locally on the radio, and it also streams online. It is the longest-running Christian radio station in the United States. The Lutheran Church–Missouri Synod (LCMS) owns and runs the station. It broadcasts talk programs about the Bible, theology, and society. It also plays Lutheran sacred music. The station broadcasts four Lutheran church services on the weekends.