North Philadelphia, nicknamed North Philly, is a section of Philadelphia, Pennsylvania. It is immediately north of Center City. Though the full extent of the region is somewhat vague, "North Philadelphia" is regarded as everything north of either Vine Street or Spring Garden Street, between Northwest Philadelphia and Northeast Philadelphia. It is bordered to the north by Olney Ave along Broad Street, Spring Garden Street to the south, 35th Street to the west and Adams Avenue to the east. The Philadelphia Police Department patrols five districts located within North Philadelphia: the 22nd, 25th, 26th, 35th and 39th districts. There are thirteen ZIP codes for North Philadelphia: 19120, 19121, 19122, 19123, 19125, 19126, 19130, 19132, 19133, 19134, 19137, 19140 and 19141.

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.