The B6 constitutes a bus route between Bath Beach and East New York in Brooklyn, New York City. Originally operated by Brooklyn-Manhattan Transit, the route is operated by the MTA Regional Bus Operations under the New York City Transit Authority brand.

Bath Beach is a neighborhood in the New York City borough of Brooklyn, 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.