Ruffle Bar is a 143-acre (58 ha) island located in Jamaica Bay in the borough of Brooklyn in New York City, off the coast of Canarsie. The island is part of the Jamaica Bay Wildlife Refuge, and lies just east of the former Barren Island, where Floyd Bennett Field is now located.

Jamaica Bay is an estuary on the southern portion of the western tip of Long Island, in the U.S. state of New York. The estuary is partially man-made, and partially natural. The bay connects with Lower New York Bay to the west, through Rockaway Inlet, and is the westernmost of the coastal lagoons on the south shore of Long Island. Politically, it is primarily divided between the boroughs of Brooklyn and Queens in New York City, with a small part touching Nassau County.