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. It uses the Whitehall Zip Code of 18052, and is directly across the Lehigh River from the mouth of Catasauqua Creek, the site of the first successful anthracite iron producing North American blast furnaces in 1839.