Northern Liberties is a neighborhood in Philadelphia, Pennsylvania, United States. It is north of Center City along the Delaware River. Prior to its incorporation into Philadelphia in 1854, it was among the top 10 largest cities in the U.S. in every census from 1790 to 1850. It was a major manufacturing area that attracted many European immigrants in the late 19th and early 20th centuries. In the early 21st century, it has attracted many young professionals and new commercial and residential development.

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.