State Route 300 is a 6.33-mile (10.19 km) long north–south state highway in northwestern Ohio, a U.S. state. The southern terminus of SR 300 is at a T-intersection with U.S. Route 6 (US 6) approximately 1.50 miles (2.41 km) west of the village of Helena. Its northern terminus is at US 20 just over 2.50 miles (4.02 km) southeast of Woodville.
State Route 701 is a 8.96-mile (14.42 km) east–west state highway in western Ohio, a U.S. state. The state highway's western terminus is at a T-intersection with SR 309 nearly 3 miles (4.8 km) southeast of Ada. The eastern terminus of State Route 701 is at U.S. Route 68 (US 68) approximately 3.50 miles (5.63 km) southeast of Dunkirk.
State Route 366 is an east–west state highway in the western portion of the U.S. state of Ohio. SR 366 has its western terminus at a T-intersection with U.S. Route 33 nearly 1.50 miles (2.41 km) northwest of Lakeview. The route's eastern terminus is at State Route 117 about 1.50 miles (2.41 km) north of Huntsville. SR 366 runs along the western and southern edge of Indian Lake and provides access to homes and recreational facilities along the lake shoreline. SR 366 was designated in 1939, and was extended in 1961.
State Route 368 is a short north–south state highway in western Ohio, a U.S. state. SR 368 travels from its southern terminus at SR 366 approximately 1.75 miles (2.82 km) east of Russells Point to its northern terminus on Seminole Island in the eastern half of Indian Lake, at an intersection where it meets Logan County Road 272 (CR 272) and CR 286. Having made its debut in the late 1930s, SR 368 is a two-lane spur route that serves both Indian Lake State Park and communities of cottages that are on two eastern Indian Lake islands: Shawnee and Seminole.
State Route 540 (SR 540) is an east–west state highway in the western portion of the U.S. state of Ohio. SR 540 has its western terminus in downtown Bellefontaine at a signalized intersection with U.S. Route 68 (US 68) and SR 47. Its eastern terminus is at a T-intersection with SR 292 approximately 3.50 miles (5.63 km) southwest of West Mansfield.
State Route 26 is a 67-mile-long (108 km) north–south route in south eastern Ohio spanning from SR 7 in Marietta to SR 148 between Jerusalem and Bethesda. SR 26 also passes through Graysville and Woodsfield. Where the state route designation ends in Wayne Township, the road continues north as Belmont County Road 26 where it connects to the Barkcamp State Park and the National Road. Much of the route parallels the Little Muskingum River and travels through the heart of Wayne National Forest's Marietta Unit.
State Route 161 (SR 161) is an east–west state highway in central Ohio. Its western terminus is in Mutual at State Route 29 and its eastern terminus is near Alexandria at State Route 37. It is 57.46 miles (92.47 km) long. State Route 161 passes through Columbus, Ohio's capital, and a variety of towns including Plain City, Dublin, and New Albany.
State Route 797 was a very short, unsigned north–south state highway in the eastern portion of the U.S. state of Ohio. At the time of its deletion of the route from the state highway system, SR 797 ran from its southern terminus at the U.S. Route 22/U.S. Route 40 concurrency about 4.75 miles (7.64 km) northeast of Zanesville to its northern terminus less than 0.40 miles (0.64 km) to the northwest at Interstate 70 at its exit 160, a diamond interchange. North of the interchange, the road continues to Sonora on Muskingum County Road 52, Sonora Road.
State Route 372 (SR 372) is a very short, two-lane east–west state highway in the southern part of the U.S. state of Ohio. The western terminus of this spur route is at a T-intersection with the concurrency of U.S. Route 23 (US 23) and SR 104 about six and a half miles (10.5 km) north of Waverly. Its eastern terminus is just 0.68 miles (1.09 km) to the east of that point at the boundary of Scioto Trail State Forest. Continuing east of that point is Stoney Creek Road, which traverses through the state forest in the direction of the Scioto River. From its inception in the middle of the 1930s, the primary function of SR 372 has been to provide access to the state forest from the state highway system.
State Route 605 is a 9.38-mile-long (15.10 km) north–south state highway in central Ohio. The southern terminus of SR 605 is at a signalized intersection with U.S. Route 62 in the northeastern Columbus suburb of New Albany. Its northern terminus is also at SR 37, a signalized intersection approximately 3 miles (4.8 km) southeast of Sunbury. The route was designated in 1937, and the northern terminus was moved in 1994.
State Route 257 is a 26.19-mile (42.15 km) north - south state highway in the central portion of the U.S. state of Ohio. The highway's southern terminus is in the northwestern Columbus suburb of Dublin at a roundabout intersection with U.S. Route 33 and SR 161. This mainly two-lane highway follows the eastern side of the Scioto River from Dublin to its junction with US 42. After crossing over the river with the U.S. highway, SR 257 parallels the river's western bank. SR 257 has its northern terminus at a T-intersection with SR 47 on the western village limits of Prospect. SR 257 was created in 1926, and extended in 1935 and 1937.
State Route 800 is a north–south state highway in the eastern portion of the U.S. state of Ohio. Its southern terminus is at SR 7 in Jackson Township near New Matamoras, and its northern terminus is at its interchange with Interstate 77 in Canton.
State Route 664 is a north–south state highway in the southern portion of the U.S. state of Ohio. The highway has its southern terminus at a T-intersection with SR 56 in the unincorporated community of South Bloomingville. The northern terminus of SR 664 is also at a T-intersection, this time with SR 256 on the Fairfield–Perry county line approximately 4.75 miles (7.64 km) north of the village of Rushville.
State Route 313 is a 34.38-mile (55.33 km) long east–west state highway located in the southeastern portion of the U.S. state of Ohio. The western terminus of SR 313 is at a T-intersection with SR 146 approximately 9.50 miles (15.29 km) northwest of the village of Cumberland. Its eastern terminus is near the eastern end of Senecaville Lake at a T-intersection with SR 147 nearly 3.50 miles (5.63 km) southwest of Batesville.
State Route 347 (SR 347) is an east–west state highway in central portion of the U.S. state of Ohio. The western terminus of SR 347 is at SR 287 near Middleburg, adjacent to the U.S. Route 33 freeway. Its eastern terminus is at a T-intersection with SR 37 just one-quarter mile (0.40 km) south of the village of Magnetic Springs. The route runs through rural areas of Logan and Union counties passing through no incorporated villages.
State Route 312 (SR 312) is a north–south state highway located in the southern portion of the U.S. state of Ohio. SR 312 runs from its southern terminus at a T-intersection with SR 93 approximately 4.25 miles (6.84 km) northeast of Logan to its northern terminus at a T-intersection with SR 664 nearly 1.25 miles (2.01 km) south of Bremen.
State Route 674 is a state highway located southeast of Columbus, Ohio. Most of the route straddles a county line; about 11 miles (18 km) of the southern part of route is on the Pickaway–Fairfield County line while the next 1.4 miles (2.3 km) is on the Fairfield-Franklin County line. The route's southern terminus is at US 22 just north of Stoutsville while the northern terminus is at an interchange with US 33 in the city of Canal Winchester.
