Catasauqua, referred to colloquially as Catty, is a borough in Lehigh County, Pennsylvania, United States. Catasauqua's population was 6,518 at the 2020 census. It is a suburb of Allentown in the Lehigh Valley, which had a population of 861,899 and was the 68th-most populous metropolitan area in the U.S. as of the 2020 census.
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