Which Island is in the Town of Southold in Suffolk County, New York in the United States Plum Island or Block Island Sound?
Plum Island (New York) Plum Island is an island in the Town of Southold in Suffolk County, New York in the United States. The island is situated in Gardiners Bay, east of Orient Point, off the eastern end of the North Fork coast of Long Island. It is about 3 mi long and 1 mi wide at its widest point.
Gardiners Bay Gardiners Bay is a small arm of the Atlantic Ocean, approximately 10 mi (16 km) long and 8 mi (13 km) wide in the U.S. state of New York between the two flukelike peninsulas at the eastern end of Long Island. It is bounded on its eastern end, where it connects to Block Island Sound, by Gardiners Island and Promised Land.