City Hall station is a SEPTAsubway station in Philadelphia. Located in Center City underneath City Hall, it serves the Broad Street Line. It is the busiest station on the line, serving 57,000 passengers daily.[2] City Hall station is served by local, express, and special "Sport Express" trains. Entrances are located on the east and west sides of City Hall, as well as in the central courtyard. A free interchange also provides access to the Market–Frankford Line at 15th Street station, which is connected to City Hall by the Downtown Link underground concourse.