6 (New York City Subway service)

Lexington Avenue Local Pelham Bay Park Express
Pelham Bay Park-bound 6 local train of R62As at Brooklyn Bridge-City Hall
Pelham Bay Park-bound 6 express train of R62As passing through Elder Avenue
Northern end	Pelham Bay Park (all times) Parkchester (weekdays, peak direction)
Southern end	Brooklyn Bridge–City Hall
Stations	38 (local service) 29 (express service)
Rolling stock	R62A[1][2] (Rolling stock assignments subject to change)
Depot	Westchester Yard
Started service	October 27, 1904; 120 years ago (1904-10-27)
Route map Legend  6   <6>  Pelham Bay Park Buhre Avenue Middletown Road Westchester Square–East Tremont Avenue Zerega Avenue Castle Hill Avenue  6  (rush hours) Parkchester St. Lawrence Avenue Morrison Avenue–Soundview Elder Avenue Whitlock Avenue Hunts Point Avenue Longwood Avenue East 149th Street East 143rd Street–St. Mary's Street Cypress Avenue Brook Avenue Third Avenue–138th Street ​ the Bronx via Jerome Avenue The Bronx Manhattan 125th Street 116th Street 110th Street 103rd Street 96th Street 86th Street northbound local only 77th Street 68th Street–Hunter College 59th Street 51st Street Grand Central–42nd Street 33rd Street 28th Street southbound only 23rd Street 18th Street 14th Street–Union Square Astor Place Bleecker Street Spring Street Canal Street Worth Street Brooklyn Bridge–City Hall  6   <6>  City Hall ​ Downtown & Brooklyn via Eastern Parkway Legend Lines used by the Other services sharing tracks with the Unused lines, connections, or service patterns  6  Termini of services Cross-platform interchange Platforms on different levels This diagram: view talk edit

The 6 Lexington Avenue Local and <6> Pelham Bay Park Express^[3] are two rapid transit services in the A Division of the New York City Subway. Their route emblems, or "bullets", are colored forest green since they use the IRT Lexington Avenue Line in Manhattan.^[4] Local service is denoted by a (6) in a circular bullet, and express service is denoted by a <6> in a diamond-shaped bullet. On the R62A rolling stock, this is often indicated by LEDs around the service logo to indicate local or express service to riders. The LEDs illuminate in a green circle pattern for 6 local trains and in a red diamond pattern for <6> trains.

6 trains operate local at all times between Pelham Bay Park in the Bronx and Brooklyn Bridge–City Hall in Lower Manhattan. During weekdays in the peak direction, <6> Pelham Express trains replace 6 local trains north of Parkchester, and run express between that station and Third Avenue–138th Street. During this time, 6 Pelham Local trains short turn at Parkchester (except for peak-direction <6> Express trains that return in the opposite direction as 6 Local trains). Weekdays from 9:00 to 11:00 a.m., select Manhattan-bound <6> trains run local from Parkchester to Hunts Point Avenue while select Parkchester-bound 6 trains run express in that section.

The 6 in its current format has run since the implementation of the IRT "H" system in 1918. Since 1920, it has remained largely unchanged, running between Pelham Bay Park and City Hall with a peak-express variant in the Bronx. In 1945, the city closed the City Hall Loop station, the 6's former southern terminal in Manhattan. Since then, most 6 trains have terminated at Brooklyn Bridge, with a few exceptions in later years. In 2023^[update], the 6 was the busiest route in the subway system, carrying around 140 million passengers.^[5]