Baychester is a neighborhood geographically located in the northeast Bronx borough of New York City in the United States. The neighborhood is part of Bronx Community Board 12. Its boundaries, starting from the north and moving clockwise are: East 222nd Street to the north, the New England Thruway (I-95) to the east, Pelham Parkway to the south, and Boston Road to the west. Eastchester Road is the primary thoroughfare through Baychester. Many homes are located on streets in the 201s and advancing to the 220s. While 10469 is the primary ZIP code of Baychester, it also covers the adjacent neighborhood of Pelham Gardens, Bronx. The area is patrolled by the 47th Precinct of the New York City Police Department, located at 4111 Laconia Avenue in the Williamsbridge section of the Bronx.

Baychester is dominated by one and two family homes of various styles. The total land area is 2.61 square miles. The area is low laying and flat; some parts of the East Bronx are built on marshland and valleys. The area was formerly home to the amusement park Freedomland U.S.A., opened in 1959 and closed in 1964.