B63 (New York City bus)

b63
Fifth Avenue Line
A 2017 XN40 (773) on the B63 in Downtown Brooklyn at Atlantic Terminal in March 2019
Overview
System	MTA Regional Bus Operations
Operator	New York City Transit Authority
Garage	Jackie Gleason Depot
Vehicle	New Flyer C40LF CNG New Flyer Xcelsior XN40
Began service	August 28, 1860
Route
Locale	Brooklyn, New York, U.S.
Communities served	Fort Hamilton, Bay Ridge, Sunset Park, Park Slope, Downtown Brooklyn, Boerum Hill, Cobble Hill
Start	Brooklyn Bridge Park – Pier 6
Via	Fifth Avenue, Atlantic Avenue
End	Bay Ridge – Shore Road
Length	5.8 miles (9.3 km)
Other routes	B37 Third Avenue
Service
Operates	24 Hours[1]
Annual patronage	2,671,618 (2023)[2]
Transfers	Yes
Timetable	B63
Route map ← B61  {{{system_nav}}}  B64 →

The B63 is a bus route in Brooklyn, New York City, running mainly along Fifth Avenue and Atlantic Avenue between Fort Hamilton and Cobble Hill. Originally a streetcar line called the Fifth Avenue Line, it is now operated by the New York City Transit Authority as the Fifth/Atlantic Avenues bus.