Bath Beach is a neighborhood in Brooklyn, New York City, United States. It is located at the southwestern edge of the borough on Gravesend Bay. The neighborhood borders Bensonhurst and New Utrecht to the northeast across 86th Street; Dyker Beach Park and Golf Course to the northwest across 14th Avenue; and Gravesend to the east across Stillwell Avenue.

Despite its name, the neighborhood no longer has an actual beach. The beach was paved over during the mid-twentieth century to create the Shore Parkway. On the northwestern half, a promenade was constructed to allow residents access to a sea wall. The southwestern half, filled in with land excavated from the construction of the Shore (Belt) Parkway in the early 1940s, extended Bensonhust Park, from Cropsey Avenue with ballfields and, later, the Ceasar's Bay shopping center.