On April 13, 1954, the enlarged station platform at Marcy Avenue was opened, as well as the expanded stairway facilities.

[8] In 1982, the Urban Mass Transportation Administration gave a $66 million grant to the New York City Transit Authority.

[11] In December 2021, the MTA awarded a contract for the replacement of the Marcy Avenue station's elevators, to be completed by late 2023 or early 2024.

[15] Both platforms have beige windscreens and red canopies with green frames that run along the entire length except for a section at the southeast (railroad south), where they have waist-high black steel fences.

[16] Just west of this station, there is a short section of trackway continuing straight which once led to the Broadway Ferry Spur.

As now configured, westbound trains run over the Williamsburg Bridge, connecting to the BMT Nassau Street Line in Manhattan.

To the east, there are switches that are used to access the center express track, which is used by the J and Z trains in the peak direction weekday midday and rush hours.

Flight of the Conchords are seen emerging from Marcy Avenue station singing the song Inner City Pressure during season 1, episode 2 of their eponymous TV show.