B6 (New York City bus)

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Bay Parkway Line Glenwood Road/Cozine Avenue
A 2011 XD40 (4887) on the B6 local short-turning at the Rockaway Parkway subway station in Canarsie.
Overview
System	MTA Regional Bus Operations
Operator	New York City Transit Authority
Garage	Ulmer Park Depot
Vehicle	New Flyer Xcelsior XD40
Began service	August 24, 1931 September 11, 2000 (B6 Limited)
Route
Locale	Brooklyn, New York, U.S.
Communities served	Bath Beach, Bensonhurst, Mapleton, Midwood, Flatbush, Flatlands, Canarsie, East New York
Start	Bath Beach - Cropsey Avenue and Bay 37th Street (full route) Midwood - Avenue J and Coney Island Avenue (select weekday local trips)
Via	Bay Parkway, Avenue J, Avenue H, Flatlands Avenue, Cozine Avenue
End	East New York - New Lots Avenue station (full route) Canarsie - Canarsie–Rockaway Parkway station (daytime local terminus)
Length	10.5 miles (16.9 km)
Other routes	B82 Bay Parkway/Kings Highway/Flatlands Avenue
Service
Operates	All times
Annual patronage	6,049,383 (2023)[1]
Transfers	Yes
Timetable	B6
Route map ← B4  {{{system_nav}}}  B7 →

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.

The B6 has consistently ranked as one of the busiest bus routes in the city, being the busiest bus route in Brooklyn, and ranked third overall citywide, with over 6 million people riding the route in 2023.