Allentown is a city in the Lehigh Valley region of eastern Pennsylvania, in the United States. It is the third largest city in Pennsylvania, after Philadelphia and Pittsburgh. Allentown is also the county seat of Lehigh County. As of 2010, Allentown's population was 118,032. As of 2000, the population density was 6,011.5/mi²(2,320.8/km²).
Allentown was founded in 1762 by William Allen. It was then known as "Northampton Town." It was renamed "Allentown" in 1838 and it was formally incorporated as a city on March 12, 1867. Allentown has a large Latino/Hispanic population. Hispanics make up over 40% of Allentown's population.