State Route 218 (SR 218) is a north–south state highway in the southern portion of the U.S. state of Ohio. The southern terminus of State Route 218 is at a T-intersection with State Route 217 approximately 5 miles (8.0 km) northwest of Athalia. Its northern terminus is at a T-intersection with State Route 7 about 2 miles (3.2 km) south of Gallipolis.