Logan Circle, also known as Logan Square, is an open-space park in Center City Philadelphia's northwest quadrant and one of the five original planned squares laid out on the city grid. The centerpiece of the park is the Logan Circle, a circular area centered on a large water feature, bounded by a traffic circle carrying 19th Street and the Benjamin Franklin Parkway with connections to 18th and 20th streets to the east and west and Race and Vine Streets to the south and north.

Center City includes the central business district and central neighborhoods of Philadelphia, Pennsylvania, United States. It comprises the area that made up the City of Philadelphia prior to the Act of Consolidation, 1854, which extended the city borders to be coterminous with Philadelphia County.