Middletown Township is a township in Bucks County, Pennsylvania, United States. The population was 45,436 at the 2010 census. Many sections of Levittown, Pennsylvania, are located in the southern end of the township. The municipality surrounds the boroughs of Langhorne, Langhorne Manor, Penndel and Hulmeville; much of the township beyond Levittown uses Langhorne, Pennsylvania as a mailing address.
Also located within the township is Core Creek Park. The township also has many acres of protected woods, the largest being the woods behind Neshaminy High School. The Neshaminy Creek flows through these woods. There are also a few protected farms, significantly that of Styer's Orchards, which was saved from turning into the site of 632 homes in the late 1990s.
Sesame Place is located in Middletown Township.