is a city located in Lehigh County, Pennsylvania, in the United States. It is Pennsylvania's third most populous city, after Philadelphia and Pittsburgh. As of the 2000 census, the city had a total population of 106,632, (2008 estimate 107,250). 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 (97 km) north of Philadelphia, the sixth most populous city in the United States, 80 miles (130 km) east of Harrisburg, the state capital, and 90 miles (140 km) west of New York City, the nation's largest city.
Two four-year colleges, Cedar Crest College and Muhlenberg College, are located in Allentown. Dorney Park and Wildwater Kingdom, a very popular amusement park, is located just outside of the city.
Commercial airline service to and from the city is available through Lehigh Valley International Airport (LVIA) (IATA: ABE, ICAO: KABE). General aviation and charter service is offered by LVIA and Allentown Queen City Municipal Airport (ICAO: KXLL, FAA LID: XLL).
The city is connected to the Interstate Highway System by Interstate 78, and Interstate 476, the Northeast Extension of the Pennsylvania Turnpike, which provide limited access connections to the major urban areas of other Northeastern United States urban areas. Also U.S. Route 22, the Lehigh Valley Thruway, provides a limited access east-west highway connection to the Interstate Highway System to the northern parts of the city!