Lehigh Valley

Lehigh ValleyThe Great Appalachian Valley with the Lehigh Valley (5) south of the Ridge-and-Valley Appalachians between Kittatinny Valley (4) to the north and Lebanon Valley (6) to the south Interactive Map of Allentown–Bethlehem–East Stroudsburg, PA–NJ CSA Allentown–Bethlehem–Easton, PA–NJ MSA City of Allentown City of Bethlehem City of Easton East Stroudsburg MSA City of East Stroudsburg GeographyLocationLehigh CountyNorthampton CountyPopulation centersAllentown, Bethlehem, EastonBorders onRidge-and-Valley Appalachians Blue Mountain (north)South Mountain (south) Delaware River (east)Lebanon Valley (west) The Lehigh Valley (/ˈliːhaɪ/) is a geographic and metropolitan region formed by the Lehigh River in Lehigh and Northampton counties in eastern Pennsylvania. It is a component valley of the Great Appalachian Valley bounded to its north by Blue Mountain, to its south by South Mountain, to its west by Lebanon Valley, and to its east by the Delaware River and Warren County, New Jersey. The Lehigh Valley is about 40 miles (64 km) long and 20 miles (32 km) wide. The Lehigh Valley's largest city is Allentown, the third-largest city in Pennsylvania and the county seat of L