State Route 39 is a primarily east–west running state highway in north-central and northeastern portion of the U.S. state of Ohio. The route runs through seven counties on its approximately 155-mile (249 km) trip through the region. Its western terminus is at State Route 103 near New Washington, and its eastern terminus is at PA 68 near East Liverpool.

State Route 103 (SR 103) is a 77.07-mile (124.03 km) state route that runs between Bluffton and Willard in the US state of Ohio. Most of the route is a rural two-lane highway and passes through both farmland and residential properties. In Bluffton the route has two interchanges with Interstate 75 (I–75).