Westchester Square is a residential neighborhood geographically located in the eastern section of the New York City borough of the Bronx. Its boundaries, starting from the north and moving clockwise are: East Tremont Avenue and Silver Street, Blondell Avenue and Westchester Creek to the east, Waterbury Avenue to the south and Castle Hill Avenue to the west. The main roadways through Westchester Square are East Tremont Avenue, Westchester Avenue and Williamsbridge Road.

Bronx Community Board 10 is a local government unit of the New York City borough of the Bronx, encompassing the neighborhoods of City Island, Co-op City, Pelham Bay, Throggs Neck and Westchester Square. It is delimited by the Hutchinson River and Pelham Bay Park to the east, New England Thruway, Hutchinson River Parkway, and Westchester Creek to the west, the Bronx/Westchester County Line to the north and the East River to the south.