Prall's Island is an uninhabited island in the Arthur Kill between Staten Island, New York and Linden, New Jersey in the United States. It is one of the minor islands that are part of the borough of Staten Island in New York City. The island has an area of 88 acres (0.36 km²).

The island is named for the Prall Family, which grew hay on the island in the 19th century. The island is now owned by the City of New York and is maintained by New York City Department of Parks and Recreation as bird sanctuary.