Welcome Signs of Ohio
 |  |
| EB I-80/90; Ohio Turnpike, at the Ohio/Indiana State Line. (August, 2024) | EB I-80/90; Ohio Turnpike, at the Ohio/Indiana State Line. (April, 2025) |
 |  |
| EB I-70/SB U.S. Rt. 35, near New Westville, at the Ohio/Indiana State Line. (June, 2003) | SB I-75, near Toledo, at the Ohio/Michigan State Line. (January, 2004) |
 |  |
| WB I-70/SB U.S. Rt. 35, near New Westville,at the Ohio/Indiana State Line. (June, 2003) | EB U.S. Rt. 40, near New Westville, at the Ohio/Indiana State Line. (June, 2003) |
 |  |
| EB OH St Rt 15, near Pioneer, at the Ohio/Michigan State Line. (May, 2016) | EB I-70/SB U.S. Rt. 35 at the Indiana/Ohio State Line, near New Westville, OH. (October, 2018) |
 |  |
| WB U.S. Rt. 24, at the Ohio/Michigan State Line. (April, 2025) | SB Summit Street at the Ohio/Michigan State Line. (April, 2025) |
Highway markers of Ohio
 |
A 2-Digit interstate shield. |
 |
A 3-Digit interstate shield. |
 |
A U.S. highway shield. |
 |
A state highway shield. |
 |
A county highway shield. |
 |  |
| WB I-70/NB U.S. Rt. 35 at the Indiana/Ohio State Line. (June, 2003) | WB I-70/NB U.S. Rt. 35 at the Indiana/Ohio State Line. (October, 2018) |
Interstate :
- Interstate 70
- Interstate 71
- Interstate 74
- Interstate 75
- Interstate 76
- Interstate 77
- Interstate 80
- Interstate 90
U.S. Highways :
- U.S. 6
- U.S. 20
- U.S. 22
- U.S. 23
- U.S. 24
- U.S. 27
- U.S. 30
- U.S. 33
- U.S. 35
- U.S. 40
- U.S. 42
- U.S. 50
- U.S. 52
- U.S. 62
- U.S. 68
- U.S. 127
- U.S. 223
- U.S. 224
- U.S. 250
- U.S. 322
- U.S. 422
State Highways :
- Highways 1-50:
- Highways 51-100:
- Highways 101-199:
- Highways 200-299:
- Highways 300-499:
- Highways 500-872: