Which Island is in the Town of Southold in Suffolk County, New York in the United States Plum Island or Block Island Sound?
Block Island Sound Block Island Sound is a strait in the open Atlantic Ocean, approximately 10 mi wide, separating Block Island from the coast of mainland Rhode Island in the United States. On the west, it extends to Montauk Point on the eastern tip of Long Island, as well as Plum Island, Gardiners Island, and Fishers Island, all in the state of New York.
Holy Island, Massachusetts Holy Island is a marshy island located off the northeast coast of Massachusetts, north of Cape Ann. The island is situated immediately west of Plum Island and is part of the Town of Ipswich in Essex County. The Rowley River runs by the island, which is the northernmost of four marshy islands.