Hunter Island is a 166-acre (67 ha) peninsula and former island in the Bronx, New York City, United States. It is situated on the western end of Long Island Sound, along the sound's northwestern shore, and is part of Pelham Bay Park in the northeastern part of the Bronx. Hunter Island initially covered 215 acres (87 ha) and was one of the Pelham Islands, the historical name for a group of islands in western Long Island Sound that once belonged to Thomas Pell. The island is connected to another former island, Twin Island, on the northeast.

The Pelham Islands are a group of islands in western Long Island Sound that belonged to Thomas Pell in the 17th century. The islands, and most of the surrounding area, were purchased from the Siwanoy Indians by Pell in 1654, creating Pelham Manor. This large tract of land would eventually become the present-day Town and Village of Pelham and Pelham Manor, Town of Eastchester, cities of New Rochelle and Mount Vernon in Westchester County, and the Pelham Bay and Eastchester neighborhoods of the Bronx in New York City.