Lehigh Township is a township in Northampton County, Pennsylvania. The population of Lehigh Township was 10,526 as of the 2010 census. 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. Lehigh Township is located 14.5 miles (23.3 km) north of Allentown, 73.4 miles (118.1 km) north-northwest of Philadelphia, and 97.9 miles (157.6 km) east of New York City.