State Route 595 (SR 595) is a north–south state highway in southeastern Ohio, a U.S. state. The route's southern terminus is at a diamond interchange with the U.S. Route 33 (US 33) expressway approximately three and a half miles (5.6 km) southeast of Logan. Its northern terminus is at a T-intersection with SR 216 in New Straitsville, just two blocks southeast of SR 216's northern terminus at SR 93.