 After the walking purchase of 1737 between the Penn family and the Lenape (also known as the Delaware) was completed, Old Mount Bethel was established within the County of Bucks.In 1752 Bucks County was divided and Northampton County was established, geographically placing Old Mount Bethel within the boundaries of Northampton County.The township is served by the Bangor Area School District and is the home to Bangor Area High School.