City Island is a neighborhood in the northeastern Bronx in New York City, located on an island of the same name approximately 1.5 miles (2.4 km) long by 0.5 miles (0.80 km) wide. City Island is located at the extreme western end of Long Island Sound, south of Pelham Bay Park, and east of Eastchester Bay.

Hart Island, sometimes referred to as Hart's Island, is located at the western end of Long Island Sound, in the northeastern Bronx in New York City. Measuring approximately 1 mile (1.6 km) long by 0.33 miles (0.53 km) wide, Hart Island is part of the Pelham Islands archipelago and is east of City Island.