Petty Island (also Pettys Island;[1] or Petty's Island) is a 292-acre (1.18 km2)[2] island located in the Delaware River, which forms the border between Pennsylvania and New Jersey in the United States. The island is situated between the cities of Philadelphia, Pennsylvania and Camden, New Jersey and can be seen from both the Benjamin Franklin Bridge and the Betsy Ross Bridge. It is the fourth-largest island in the Delaware River's path. Petty Island is officially part of Pennsauken Township, New Jersey. In 2019, the State of New Jersey announced plans to buy the island, owned by Citgo, and make it a nature preserve.[3]