State Route 542 is a state highway in western Carroll County, within the eastern side of Ohio. The route runs 15.8 miles (25.4 km) long and connects SR 212 near Sherrodsville to Magnolia at SR 183 by way of Dellroy and Atwood Lake.

State Route 212 is a two-lane east–west state highway that runs within Stark, Tuscarawas, Carroll, and Harrison Counties in eastern Ohio. The western terminus of SR 212 is at U.S. Route 250 near Beach City, and its eastern terminus is at SR 151 in Bowerston. The route passes through rural areas but passes through small villages including Beach City, Bolivar, Zoar, Sherrodsville, and Leesville. It largely follows the valleys formed by the Tuscarawas River and Conotton Creek.