U.S. Route 431 (US 431) in Kentucky runs 86.93 miles (139.90 km) from the Tennessee state line south of Adairville to US 60 at Owensboro. It crosses the state in mainly west-central portions of the state, passing through or near towns such as Russellville, Lewisburg, Central City and Livermore. The route goes through Logan, Muhlenberg, McLean County, and Daviess counties.