Back Interstate 79 German Interstate 79 Basque بزرگراه میانایالتی ۷۹ Persian Interstate 79 French Interstate 79 Italian 주간고속도로 제79호선 Korean Interstatal 79 LMO Interstate 79 Dutch Autostrada międzystanowa nr 79 Polish Interstate 79 Portuguese
 Interstate 79 | ||||||||||
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 I-79 highlighted in red | ||||||||||
| Route information | ||||||||||
| Maintained by WVDOH and PennDOT | ||||||||||
| Length | 343.46 mi[1] (552.75 km) | |||||||||
| Existed | 1958–present | |||||||||
| NHS | Entire route | |||||||||
| Major junctions | ||||||||||
| South end |  I-77 near Charleston, WV | |||||||||
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| North end |   PA 5 / PA 290 / Bayfront Parkway in Erie, PA | |||||||||
| Location | ||||||||||
| Country | United States | |||||||||
| States | West Virginia, Pennsylvania | |||||||||
| Counties | WV: Kanawha, Roane, Clay, Braxton, Gilmer, Lewis, Harrison, Marion, Monongalia PA: Greene, Washington, Allegheny, Butler, Lawrence, Mercer, Crawford, Erie | |||||||||
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Interstate 79 (I-79) is an Interstate Highway in the Eastern United States, designated from I-77 in Charleston, West Virginia, north to Pennsylvania Route 5 (PA 5) and PA 290 in Erie, Pennsylvania. It is a primary thoroughfare through western Pennsylvania and West Virginia and makes up part of an important corridor to Buffalo, New York, and the Canada–United States border. Major metropolitan areas connected by I-79 include Charleston and Morgantown in West Virginia and Greater Pittsburgh and Erie in Pennsylvania.
In West Virginia, I-79 is known as the Jennings Randolph Expressway, named for the West Virginia representative and senator. In the three most northern counties, it is signed as part of the High Tech Corridor. For most of its Pennsylvania stretch, it is known as the Raymond P. Shafer Highway, named for the 39th Pennsylvania governor.
- ^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved March 31, 2023.