West Catasauqua is an unincorporated village in Whitehall Township in Lehigh County, Pennsylvania. Once a port and station along the busy Lehigh Canal, it is colloquially known as West Catty. It is part of the Lehigh Valley, which has a population of 861,899 and is the 68th-most populous metropolitan area in the U.S. as of the 2020 census.