The east-west upper level platforms (now Market–Frankford Line) opened on August 3, 1908, as part of the first extension of the
Philadelphia Rapid Transit Company's 1907-opened Market Street Subway. On December 21, 1932, the
Broad-Ridge Spur of the
Broad Street Line opened, with its terminus at a new lower-level
island platform (signed as Market Street).
Bridge Line service to Camden began on June 7, 1936, using a 1932-built tunnel connecting the lower level tracks to the
Delaware River Bridge. Beginning in 1949, Ridge Spur and Bridge Line trains were through-routed, reversing at Market Street station. On February 15, 1953, the Locust Street Subway opened, extending the lower level tracks south and west to
16th and Locust streets. Bridge Line trains were extended to 16th and
Locust Streets, while Ridge Spur trains terminated at Market. In January 1954, due to low ridership on the extension, off-peak service and Saturday again began operating between Girard and Camden, with a shuttle train operating between 8th and 16th stations. Sunday service was suspended at that time due to minimal usage. Over the weekend of August 23–27, 1968, tracks at the station were reconfigured as part of the construction of the
Lindenwold High-Speed Line (PATCO Speedline). Ridge Spur trains were redirected to a new single-track upper level terminus platform, separating the spur from the 8th–Locust Street subway. Bridge Line service was temporarily divided into 16th and Locust–8th Street and 8th Street–Camden segments, with a cross-platform transfer at 8th Street. Bridge Line service was suspended from December 29, 1968, to February 15, 1969, when the new service began. The station complex was made
accessible in 2009. One of the escalators was replaced from spring 2015 to spring 2016 as part of SEPTA's Center City Concourse Improvement Program. == Station layout ==