Hanover Township is a township in Lehigh County, Pennsylvania. As of the 2010 census, the township had a population of 1,571. It is a suburb of Allentown and Bethlehem and 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. Hanover Township is home of Lehigh Valley International Airport, the fourth largest airport in Pennsylvania, with 851,000 passengers annually as of 2020.