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Heidelberg Township is a township in Lehigh County, Pennsylvania. It is a suburb of Allentown, Pennsylvania in the Lehigh Valley, which has a population of 861,899 and is the 68th most populated metropolitan area in the U.S. as of the 2020 census. The population of Heidelberg Township was 3,416 at the 2010 census.[1] [edit] Research Tips
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