The 23rd Street station is a local station on the IND Sixth Avenue Line of the New York City Subway, located at the intersection of 23rd Street and Sixth Avenue in Manhattan. It is served by the F train at all times, the M train during weekdays, and by the <F> train during rush hours in the peak direction. This station and 14th Street are the only two local stations on the Sixth Avenue Line.

The IND Sixth Avenue Line is a rapid transit line of the B Division of the New York City Subway in the United States. It runs mainly under Sixth Avenue in Manhattan, and continues south to Brooklyn. The B, D, F, and M trains, which use the Sixth Avenue Line through Midtown Manhattan, are colored orange. The B and D trains use the express tracks, while the F, <F> and M trains use the local tracks.