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.

Since 1920, it has remained largely unchanged, running between Pelham Bay Park and City Hall with a peak-express variant in the Bronx.

[5] On October 27, 1904, local and express service opened on the original subway in Manhattan, following the route of the present IRT Lexington Avenue Line from City Hall to Grand Central–42nd Street.

[16] On January 28, 1931, two southbound morning rush hour trips began starting at Pelham Bay Park instead of Hunts Point Avenue.

Two additional southbound trips were added, starting at Pelham Bay Park at 5:50 and 6:10 a.m., reducing headways from ten to five minutes.

Four northbound trips that terminated at Hunts Point Avenue between 3:53 and 5:05 p.m. were extended to Pelham Bay Park, reducing headways from nine to six minutes, and four northbound trips terminating at Third Avenue-138th Street between 3:36 and 4:48 p.m. were extended to Hunts Point Avenue, reducing headways from 4+1⁄2 to 3 minutes.

[22] From December 15 to 22, 1950, the weekday rush hour trains from Pelham Bay Park were extended to South Ferry.

[citation needed] Beginning on January 13, 1980, late-night service terminated at 125th Street in Manhattan with the 4 again making all stops south of there.

This service cut affected 15,000 riders and was criticized by Manhattan Borough President Andrew Stein as no public hearing was held.

[19][24] For a few months in 1985, one scheduled daily 6 train traveled to Atlantic Avenue in Brooklyn before turning for Pelham Bay Park.