Allentown is a city located in Lehigh County, Pennsylvania, in the United States. It is Pennsylvania's third most populous city, after Philadelphia and Pittsburgh. It is the county seat of Lehigh County. Located on the Lehigh River, Allentown is the largest of three adjacent cities that make up a region of eastern Pennsylvania and western New Jersey known as the Lehigh Valley, with the cities of Bethlehem and Easton nearby. Allentown is 60 miles (95 km) north of Philadelphia, the sixth most populous city in the United States, and 90 miles (145 km) west of New York City, the largest city. Dorney Park and Wildwater Kingdom, a highly popular amusement park, is located near Allentown. In addition, two four-year colleges, Cedar Crest College and Muhlenberg College, are located in Allentown.