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is a township in Bucks County, Pennsylvania, United States which borders the northeast section of Philadelphia. The township is composed of many communities, including Bensalem, Trevose, Oakford, Cornwells Heights, Eddington, and Andalusia. As of the 2000 census, the township had a total population of 58,434, which makes it the largest municipality in Bucks County, and the tenth largest in Pennsylvania. The township, which was founded in 1692, is almost as old as the state of Pennsylvania itself, which was founded in 1682.
Bensalem is the southernmost township in Bucks County and is bordered by Philadelphia to the west and south, Croydon and the rest of Bristol Township to the east and northeast, Hulmeville and Middletown Township to the north, and Feasterville and Trevose in Lower Southampton Township to the northwest. Across the Delaware River in Burlington County, New Jersey to the southeast, there are Beverly, Delanco Township, and Edgewater Park Township.
According to the United States Census Bureau, the township has a total area of 21.0 square miles (54.3 km²), of which, 20.0 square miles (51.7 km²) of it is land and 1.0 square miles (2.6 km²) of it (4.77%) is water.
The Fall line, which separates the Atlantic Coastal Plain region from the Piedmont region, runs through Bensalem, and is visible around the Neshaminy Mall area.