Indiana State Route 18 cuts east-west across the Center of Benton County. This is the main east-west route in the county. IN St Rt 18 passes through the following towns in Benton County. Free Fowler IN St Rt 18 is multi-plexed in Benton County. U.S. Rt. 52, from around Fowler. Indiana State Route 55, around Fowler.