The finishes at the five stations between 81st Street and 110th Street were 18 percent completed by May 1930.[9] By that August, the BOT reported that the Eighth Avenue Line was nearly completed and that the five stations from 81st to 110th Street were 99 percent completed.[10] The entire line was completed by September 1931, except for the installation of turnstiles.[11] A preview event for the new subway was hosted on September 8, 1932, two days before the official opening.[12][13] The 103rd Street station opened on September 10, 1932, as part of the city-operated IND's initial segment, the Eighth Avenue Line between Chambers Street and 207th Street.[14][15] Construction of the whole line cost $191.2 million (equivalent to $4,269.8 million in 2023). While the IRT Broadway–Seventh Avenue Line already provided parallel service, the new Eighth Avenue subway via Central Park West provided an alternative route.[16]
This underground station has two levels with northbound trains using the upper level and southbound trains using the lower one. Each level has one side platform to the west of two tracks.[17]
Both platforms have no trim line, but name tablets read "103RD ST." in white sans-serif lettering on a midnight blue background and black border. Small black "103" signs with white numbering run along the tiles at regular intervals and directional signs in the same style are below the name tablets. Blue columns run along both platforms at regular intervals with every other one having the standard black station name plate in white numbering.
Within this station, the northbound express track descends to allow the northbound local to cross over it, before rising up at 110th Street, where the line becomes the standard four tracks side by side with the local tracks on the side and express tracks in the center.[17]
The IRT Lenox Avenue Line passes underneath this station at the extreme north end on West 104th Street to Central Park North–110th Street. The line is not visible from the platforms. On the east side of Central Park West and West 104th Street, adjacent to Central Park, is an emergency exit enclosed in a small brick house for the IRT line, which passes underneath the station. From here the line curves northeast, running directly under Central Park's North Woods at this point.
This station has one fare control area at the center of the upper-level platform. A single staircase connects the two platforms before a turnstile bank leads to a token booth and one staircase going up to the northwest corner of West 103rd Street and Central Park West. The station is unique in that it has only one open staircase to street level.[18]
Directional signs that have been covered indicate that there were two more fare control areas. One exit at the extreme south end had two staircases going to southwestern corner of West 102nd Street and Central Park West, and the other at the extreme north end had two that went to both western corners of West 104th Street.[19] Further evidence of these exits' existences includes new tiling on both levels, and doorways that lead to converted storage spaces on the upper level. The fare control area with stairs to West 104th Street was closed by 1940[20] and possibly as early as November 1932 - just two months after the opening of the station - due to frequent vandalism.[21]
^O'Brien, John C. (September 9, 1931). "8th Ave. Line Being Rushed For Use Jan. 1: Turnstile Installation on Subway Begins Monday; Other Equipment Ready for Start of Train Service City Has Yet to Find Operating Company Transit Official on Trip, 207th to Canal Street, Inspects Finished Tube". New York Herald Tribune. p. 1. ISSN1941-0646. ProQuest1331181357.
^"8th Av. Subway Gets First 5c. by Woman's Error: She Peers Into a Station, Hears Train, Pays for Ride, but Is Day Too Early Preparing for Tomorrow's Rush on 8th Ave. Subway". New York Herald Tribune. September 9, 1932. p. 1. ProQuest1125436641.
^Sebring, Lewis B. (September 10, 1932). "Midnight Jam Opens City's New Subway: Turnstiles Click Into Action at 12:01 A. M. as Throngs Battle for Places in 'First' Trains Boy, 7, Leads Rush At 42d St. Station City at Last Hails 8th Ave. Line After 7-Year Wait; Cars Bigger, Clean Transit Commissioner Officially Opening New Subway at Midnight". New York Herald Tribune. p. 1. ISSN1941-0646. ProQuest1114839882.
Note: Service variations, station closures, and reroutes are not reflected here. Stations with asterisks have no regular peak, reverse peak, or midday service on that route. See linked articles for more information.
Stations and line segments in italics are closed, demolished, or planned (temporary closures are marked with asterisks). Track connections to other lines' terminals are displayed in brackets. Struck through passenger track connections are closed or unused in regular service.