Croydon is a census-designated place located in Bristol Township, Bucks County, Pennsylvania, United States.

[4] The White Hall of Bristol College was listed on the National Register of Historic Places in 1984.

[6] According to the United States Census Bureau, the CDP has a total area of 6.4 km2 (2.5 sq mi), all land.

The Neshaminy empties into the Delaware River, which borders Croydon to the east, and forms the boundary between Pennsylvania and New Jersey.

The Delaware is tidal in Croydon, and is navigable by ocean-going vessels (40 foot marked / maintained channel) as far upriver as Trenton, New Jersey.

Croydon has a humid subtropical climate and average monthly temperatures range from 32.8 °F in January to 76.6 °F in July.

The Roman Catholic Archdiocese of Philadelphia announced in 2011 that St. Thomas Aquinas School was closing as the number of students had declined.