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, and the 215th largest city in the United States. As of the 2010 census, the city had a total population of 118,032 and is currently the fastest growing city in Pennsylvania. It is also 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, Allentown is 60 mi (96.6 km) north of Philadelphia, the fifth most populous city in the United States, 80 mi (128.7 km) east of Harrisburg, the state capital, and 90 mi (144.8 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) . General aviation and charter service is offered by LVIA and Allentown Queen City Municipal Airport .
The city is connected to the Interstate Highway System by Interstate 78 and Interstate 476, the Northeast Extension of the Pennsylvania Turnpike, which provide 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. Commuter train service between Allentown and Philadelphia ended in 1979 when state funding to operate the service ceased.
Allentown is a two-time winner of the All-America City Award, being recognized in 1962 and 1974 � 1975.