 | This article needs additional citations for verification. (January 2009) |
Philadelphia County | |
|---|---|
| City and County of Philadelphia | |
 Old City Hall in Philadelphia in June 2011 | |
 Seal | |
 Location within the U.S. state of Pennsylvania | |
 Pennsylvania's location within the U.S. | |
| Coordinates: 40°01′N 75°08′W / 40.01°N 75.13°W | |
| Country |  United States |
| State |  Pennsylvania |
| Founded | March 10, 1682 |
| Named for | City of Philadelphia |
| Seat | Philadelphia |
| Largest city | Philadelphia |
| Area | |
| • Total | 143 sq mi (370 km2) |
| • Land | 134 sq mi (350 km2) |
| • Water | 8.6 sq mi (22 km2) 6.0% |
| Population (2020) | |
| • Total | 1,603,797 |
| • Density | 11,969/sq mi (4,621/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional districts | 2nd, 3rd, 5th |
| Website | www |
Philadelphia County is the most populous of the 67 counties of Pennsylvania and the 24th-most populous county in the nation. As of the 2020 census, the county had a population of 1,603,797.[1] It is coextensive with Philadelphia, the nation's sixth-largest city. The county is part of the Southeast Pennsylvania region of the state.[a]
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. Philadelphia County is the core county in the Philadelphia-Camden-Wilmington Combined Statistical Area (PA-NJ-DE-MD, located along the lower Delaware and Schuylkill Rivers, within the Northeast megalopolis.
Philadelphia County is the Delaware Valley's economic and cultural anchor and the ninth-largest combined statistical area in the nation with an estimated population of 7,381,18 as of 2022.[2][circular reference]
- ^ "Census - Geography Profile: Philadelphia County, Pennsylvania". United States Census Bureau. Retrieved December 18, 2022.
- ^ "Combined statistical area". The United States Census Bureau. Retrieved September 23, 2020.
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