Kavanaugh, Kentucky is an unincorporated community located in Boyd County, Kentucky, located along U.S. Route 23 directly north of the Lawrence County line. In 1984, the original alignment of U.S. 23 was replaced with a modern four-lane highway. CSX Transportation's Big Sandy Subdivision railroad tracks pass through the community. The railroad was formerly operated by the Chessie System and its predecessor the Chesapeake and Ohio Railway Company.