Logan Square is a neighborhood in Philadelphia. Bound by Market Street on the south, Spring Garden Street on the north, Broad Street on the east, and the Schuylkill River on the west, it occupies the northwest quadrant of Center City. The square for which it is named is one of the five "squares", or parks, central to William Penn's design for Philadelphia. Originally called Northwest Square, it was renamed in honor of James Logan, an eighteenth-century mayor of Philadelphia.
A number of sites listed on the National Register of Historic Places are located in Logan Square. They include the Arch Street Presbyterian Church, the Barnes Foundation, Bell Telephone Company Building, Board of Education Building, Cathedral of Saints Peter and Paul, Harris Building, Insurance Company of North America Building, Larkin-Belber Building, Logan Square, Francis McIlvain House, St. Clement's Protestant Episcopal Church, and the Wesley Building.
Penn Center, Franklintown and much of Philadelphia's Central Business District are located in Logan Square.
Coordinates: 39°58′N 75°10′W / 39.96°N 75.17°W