The East Bronx is the part of the New York City borough of the Bronx which lies east of the Bronx River; this roughly corresponds to the eastern half of the borough. Neighborhoods include: Baychester, Castle Hill, City Island, Co-op City, Country Club, Eastchester, Edenwald, Edgewater Park, Harding Park, Morris Park, Parkchester, Pelham Bay, Pelham Parkway, Soundview, Throggs Neck, Van Nest, Wakefield, Westchester Square, and Williamsbridge.
The East Bronx is less densely populated than the West Bronx. While the West Bronx is older and its underlying Fordham gneiss is very hilly, the East Bronx is not only later-settled but also underlain by younger schist and in most parts flat and coastal, much like the neighboring borough of Queens. The East Bronx was annexed by the City of New York decades later; the West Bronx in 1874, while the East Bronx remained part of Westchester County until 1895.