Seidersville is a suburban Lehigh Valley village on Route 378 in Lower Saucon Township in Northampton County, Pennsylvania. It is part of the Lehigh Valley metropolitan area, which had a population of 861,899 and was the 68th-most populous metropolitan area in the U.S. as of the 2020 census.
Seidersville is located on Lehigh Mountain, just south of Bethlehem. Its ZIP Code is 18015. [1]
40°35′16″N75°23′05″W / 40.58778°N 75.38472°W