Ohio State Route 54 is a north-south highway in Clark County. It runs in east-central and northeastern Clark County. OH St Rt 54 passes thorugh the following towns in Clark County. Plattsburg South Vienna Catawba OH St Rt 54 is not multi-plexed in Clark County. OH St Rt 54 intersects the following highways in Clark County. Ohio State Route 41, near Plattsburg. U.S. Rt. 40, near South Vienna. Interstate 70, near South Vienna.
