State Route 195 (SR 195) is a 3.6-mile-long (5.8 km) north–south state highway in the western portion of the U.S. state of Ohio. SR 195 has its southern terminus at an intersection with Hardin County Route 110 one mile (1.6 km) south of the village of McGuffey. Its northern terminus is at its junction with SR 309 about two miles (3.2 km) north of McGuffey. It is entirely located within western Hardin County.

State Route 309 is an east–west highway in central Ohio. Its western terminus is at its interchange with U.S. Route 30 (US 30) near Delphos, and its eastern terminus is at its interchange with US 30 in Mansfield. Its current route takes it through the cities of Lima, Kenton, Marion, Galion, and Ontario; as well as the villages of Elida and Caledonia.