Schnecksville is an unincorporated community and census-designated place in North Whitehall Township in Lehigh County, Pennsylvania, United States. The population of Schnecksville was 2,935 at the 2010 census. Schnecksville is a suburb of Allentown in the Lehigh Valley metropolitan area of the United States, which had a population of 861,899 and was the 68th-most populous metropolitan area in the U.S. as of the 2020 census. Its U.S. postal code is 18078.