Hart Island may refer to: Islands Hart Island (Maryland), Chesapeake Bay, USA; an island now part of Hart-Miller Island Hart Island (Bronx), New York City, New York State, USA; an island in Long Island Sound formerly part of Westchester County Hart Island (Washington), in Skagit County, state of Washington, USA; an island on the Skagit River Other uses Hart Island (book) a 1998 book about the Bronx island by Melinda Hunt and Joel Sternfeld See also Heart Island, an island in the Saint Lawrence River in New York