| Easton is a city in Northampton County, in the eastern region of Pennsylvania, in the United States. The population was 26,263 at the 2000 census. It is the county seat of Northampton County. Along with Allentown and Bethlehem, Easton is one of three primary cities that comprise the Lehigh Valley region, the state's third most populous metropolitan area. Easton is the easternmost city of the Lehigh Valley, sitting on the confluence of the Delaware River (which divides Pennsylvania and New Jersey) and the Lehigh River, for which the Lehigh Valley is named. Easton is the smallest of the three Lehigh Valley cities, with approximately one-fourth of the population of the largest Lehigh Valley city, Allentown |