Palmer Township is a township in Northampton County, Pennsylvania. The population of Palmer Township was 20,691 at the 2010 census. Palmer Township is part of the Lehigh Valley metropolitan area, which had a population of 861,899 and was thus the 68th most populous metropolitan area in the U.S. as of the 2020 census. It is located 18.2 miles (29.3 km) northeast of Allentown, 77.9 miles (125.4 km) north of Philadelphia, and 75.4 miles (121.3 km) west of New York City. The township is home to Easton Area High School, a large public high school.