Banner, KentuckyBanner is an unincorporated community in Floyd County, Kentucky, United States. It was also known as Mouth of Prater.HistoryA post office has been in operation at Banner since 1897. The community was named in honor of David Banner, a local settler.GeographyBanner lies at the intersection of Kentucky Route 80 and U.S. Route 23 at the western terminus of Kentucky Route 1426.