Bethlehem Township is a township in Northampton County, Pennsylvania, United States. Bethlehem Township is located in the Lehigh Valley region of the state and is a suburb of Bethlehem, Pennsylvania. It falls within the New York-Newark-Jersey City, NY-NJ-PA Metropolitan Statistical Area, as defined by the United States Office of Management and Budget.

The population of Bethlehem Township was 23,730 at the 2010 census.