Primary Highway List
| Highway | Location | Major cities served | Length (mi) | Length (km) | Description | References |
|---|---|---|---|---|---|---|
| I-70 | Preble, Montgomery, Clark, Madison, Franklin, Fairfield, Licking County, Ohio, Muskingum, Guernsey, and Belmont counties | Columbus, Dayton, Springfield, and Wheeling | 225.60 | 363.07 | I-70 enters the state from Wheeling, West Virginia in the east and heads west across the whole state of Ohio. Along the way, it first intersects with I-77. I-70 then travels west until it nears Columbus, where it intersects with the eastern portion of I-270. I-70 then travels into the Columbus metropolitan area, and I-71 comes in from the north and becomes concurrent with I-70. For about 1.8 miles (2.9 km), the I-70 and I-71 travel together, and I-71 then leaves towards the south. I-670 then merges into I-70 from the north. After that, I-70 passes out of the Columbus area and intersects again with I-270, but this time on the western side of its loop. Continuing west, I-70 intersects with I-675 on its northern terminus, and then I-70 intersects I-75 north of Dayton. I-70 continues west to finally exit Ohio on its western border. | |
| I-71 | Hamilton, Warren, Clinton, Fayette, Franklin, Delaware, Morrow, Richland, Ashland, Wayne, Medina, and Cuyahoga counties | Cincinnati, Cleveland, Columbus, and Mansfield | 248.15 | 399.36 | I-71 begins in Cleveland at its intersection with I-490. It then heads southwest, intersecting I-480 and then I-80. I-271 splits off to the east, as does I-76 soon after. I-71 continues southwest until it reaches Columbus, where it intersects I-270 from the north. In the Columbus metropolitan area, I-71 intersects I-670 from the north, and then becomes concurrent with I-70 and heads east for around 1.8 miles (2.9 km) before splitting off to the south. I-71 then exits the Columbus area and intersects the I-270 loop again south of Columbus. I-71 then enters the Cincinnati area from the north, intersecting I-275, and continues southwest until I-471 branches off towards the southeast. I-71 then becomes concurrent with I-75 for about .3 miles (0.48 km) before finally exiting Ohio south of Cincinnati. | |
| I-74 | Hamilton County | Cincinnati | 19.47 | 31.33 | I-74 begins at its terminus with I-75 in Cincinnati. It heads northwest and becomes concurrent with I-275 for about 2.7 miles (4.3 km). I-275 then breaks off and heads southwest, whereas I-74 continues northwest until it passes out of Ohio on its western border. | |
| I-75 | Hamilton, Butler, Warren, Montgomery, Miami, Shelby, Auglaize, Allen, Hancock, Wood, and Lucas counties | Cincinnati, Dayton, Lima, Middletown, and Toledo | 211.30 | 340.05 | I-75 enters Ohio from Michigan just north of Toledo. It heads south, and then I-280 breaks off and heads south in a slightly more easternly direction than I-75. I-75 continues south and intersects I-90, and then I-475 breaks off to the west. I-75 passes out of the Toledo area and travels south until it reaches the Dayton area, where it intersects I-70 just north of Dayton. Once south of Dayton, I-675 branches off to the east, and I-75 continues south to Cincinnati, where it intersects I-275 from the north. I-74 then branches off to the northwest, and I-75 continues south until it is just south of Cincinnati, where it becomes concurrent with I-71 for around .3 miles (0.48 km) before finally passing out of Ohio on its southern border. | |
| I-76 | Medina, Summit, Portage, and Mahoning counties | Akron, Warren, and Youngstown | 81.65 | 131.40 | I-76 enters Ohio from the east, just south of Youngstown. I-680 branches off to the north, and I-76 continues northwest until it reaches I-80. In this intersection, I-80 enters from the east and I-76 from the southeast, but I-80 leaves to the northwest and I-76 to the west. This effectively exchanges the labeling for I-76 and I-80. I-76 travels west until it becomes concurrent with I-77 for about 2.8 miles (4.5 km) in Akron. I-76 then breaks off to the south, and I-77 goes north. I-76 soon turns back to the west at its intersection with the western terminus of I-277 and continues west until it reaches its terminus on I-71. | |
| I-77 | Washington, Noble, Guernsey, Tuscarawas, Stark, Summit, and Cuyahoga counties | Akron, Canton, and Cleveland | 160.13 | 257.70 | At its northern terminus, I-77 branches off of I-90 in Cleveland. It then heads south, intersecting I-490, then I-480, then I-80, and then I-271. At Akron, I-77 cecomes concurrent with I-76 and goes east for around 2.8 miles (4.5 km), before splitting off again to the south. It then intersects I-277 before heading farther south. In southeastern Ohio, I-77 intersects I-70 and continues south until it finally exits Ohio on its southern border. | |
| I-80 | Mahoning and Trumbull counties | Akron, Cleveland, Elyria, Lorain, Toledo, Warren, and Youngstown | 237.48 | 382.19 | I-80 enters Ohio east of Warren. Southeast of Warren, I-680 merges with I-80 from the southeast. Continuing west, I-80 intersects I-76 and switches its direction to the northwest. I-80 turns west again and then intersects I-480 at its southern terminus. I-80 continues west-northwest, intersecting I-271, I-77, and I-71 in that order. Continuing west, I-80 again intersects I-480, only this time at its northern terminus. I-90 then comes in from the northeast and becomes concurrent with I-80 via the Ohio Turnpike Connector. The concurrent I-80 and I-90 continue west until they reach the area just south of Toledo, where I-280 branches off to the north. I-80 and I-90 then intersect I-75 and I-475 before continuing west to Ohio's western border, where they pass out into Indiana. | |
| I-90 | Lorain, Cuyahoga, Lake, and Ashtabula counties | Cleveland, Elyria, Lorain, and Toledo | 244.75 | 393.89 | I-90 enters Ohio's eastern border about 3 miles (4.8 km) south of Lake Erie and travels southwest inland from the shore of lake Erie. I-90 then branches off onto a new highway heading west, and the original highway continues as I-271. I-90 then becomes concurrent with Ohio State Route 2 for 10.7 miles (17.2 km) and continues southwest into Cleveland. In Cleveland, I-90 and SR-2 break apart, with SR-2 heading southwest and I-90 heading south. I-90 soon turns back to the southwest, and I-77 branches off to the south. I-90 then comes into an intersection where three highways meet: I-90 from the north, I-71 from the south, and I-490 from the east. I-90 leaves this cloverleaf intersection towards the west. Eventually, I-90 and SR-2 become concurrent again for 17.2 miles (27.7 km). They split apart again, with I-90 leaving SR-2 on the Ohio Turnpike Connector to become concurrent with I-80 until they leave the state. Near Toledo, I-280 branches off to the north. I-75 then intersects I-90, followed by I-475. The I-90 and I-80 highway then continues west until it passes out of the state. |
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I-70 at the I-71 interchange near Columbus
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I-71 near western Lancaster
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I-75 near the Lockland Miami and Erie Canal
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I-76 in Portage County
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I-80 over the Cuyahoga River
Read more about this topic: List Of Interstate Highways In Ohio
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