The Broad Street station opened on May 29, 1930, to complete the BMT Nassau Street Line, or "Nassau Street Loop", from its previous terminus at Chambers Street through this station and to a connection to the Montague Street Tunnel, which allowed trains to run to Brooklyn.
The line's completion allowed subway trains to operate via the Culver Line, whose operation used to consist of elevated trains that ran to Ninth Avenue, where transfers were made to West End subway trains.
The new line provided an additional ten percent capacity more than the existing service through DeKalb Avenue.
Service on the Jamaica Line was extended to operate to this station.

The station is under Broad and Nassau Streets, with Wall Street as the cross-street, but was named after Broad Street to distinguish it from the two other Wall Street stations nearby, at Broadway and at William Street.
From September 30, 1990, to June 14, 2015, the Broad and Fulton Street stations were closed during weekends, making them two of the four New York City Subway stations that lacked full-time service (the remaining two being the platforms for the 42nd Street Shuttle).
The Broad Street station opened on May 29, 1930, to complete the BMT Nassau Street Line, or "Nassau Street Loop", from its previous terminus at Chambers Street through this station and to a connection to the Montague Street Tunnel, which allowed trains to run to Brooklyn. The line's completion allowed subway trains to operate via the Culver Line, whose operation used to consist of elevated trains that ran to Ninth Avenue, where transfers were made to West End subway trains. The new line provided an additional ten percent capacity more than the existing service through DeKalb Avenue. Service on the Jamaica Line was extended to operate to this station.
The station is under Broad and Nassau Streets, with Wall Street as the cross-street, but was named after Broad Street to distinguish it from the two other Wall Street stations nearby, at Broadway and at William Street. From September 30, 1990, to June 14, 2015, the Broad and Fulton Street stations were closed during weekends, making them two of the four New York City Subway stations that lacked full-time service (the remaining two being the platforms for the 42nd Street Shuttle).
Broad Street station (BMT Nassau Street Line)