The Lehigh Valley 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 Lehigh County, with a population of 125,845 residents as of the 2020 census.
Image: Allentown
Image: Monocacy Creek Bethlehem
Image: Pburg 281
Image: Easton Skyline
The Lehigh River is a 109-mile-long (175 km) tributary of the Delaware River in eastern Pennsylvania. The river flows in a generally southward pattern from the Pocono Mountains in Northeastern Pennsylvania through Allentown and much of the Lehigh Valley before joining the Delaware River in Easton.
The Lehigh River near Jim Thorpe, Pennsylvania in June 2002
The Lehigh River at Walnutport in the Lehigh Valley in August 2015
Water tubers in the Lehigh River in June 2020
