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Philadelphia County is one of the three original counties, along with Chester and Bucks counties, founded by William Penn in November 1682. Since 1854, the county has been coextensive with the City of Philadelphia, which is also its county seat.
The city is bordered by six adjacent counties: Montgomery to the northwest; Bucks to the north and northeast; Burlington County, New Jersey to the east; Camden County, New Jersey to the southeast; Gloucester County, New Jersey to the south; and Delaware County to the southwest.
Learn about the history and evolution of Philadelphia County, the original county of Pennsylvania founded by William Penn in 1682. Explore how the county shaped the city's development, local government, and political reform until its consolidation in 1854.
Jun 21, 2024 · Official website of the City of Philadelphia, includes information on municipal services, permits, licenses, and records for citizens and businesses.
4 days ago · Philadelphia, city and port, coextensive with Philadelphia county, southeastern Pennsylvania, and situated at the confluence of the Delaware and Schuylkill rivers. It is the largest city in the state. Learn more about Philadelphia, including its history, in this article.
Learn about the population, diversity, economy, education, housing, health and more of Philadelphia County, PA. See charts, maps and data sources for the county and its cities and towns.
Philadelphia County is the most populous county in Pennsylvania and the 24th-most populous county in the nation. As of the 2020 census, the county had a population of 1,603,797. Its county seat is Philadelphia, the nation's sixth-largest city.
