Delaware County, Pennsylvania
Delaware County, colloquially referred to as Delco, is a county in the Commonwealth of Pennsylvania. With a population of 576,830 as of the 2020 census, it is the fifth-most populous county in Pennsylvania and the third-smallest in area. The county was created on September 26, 1789, from part of Chester County and named for the Delaware River.
Delaware County | |
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County | |
Delaware County Courthouse in Media, Pennsylvania | |
Flag Seal | |
Location within the U.S. state of Pennsylvania | |
Pennsylvania's location within the U.S. | |
Coordinates: 39°55′N 75°24′W | |
Country | United States |
State | Pennsylvania |
Founded | September 26, 1789 |
Named for | Delaware River |
Seat | Media |
Largest Township | Upper Darby |
Other cities | Chester |
Area | |
• Total | 191 sq mi (490 km2) |
• Land | 184 sq mi (480 km2) |
• Water | 6.8 sq mi (18 km2) 3.5% |
Population (2020) | |
• Total | 576,830 |
• Density | 3,000/sq mi (1,200/km2) |
Congressional district | 5th |
Website | delcopa |
Pennsylvania Historical Marker | |
Designated | October 3, 1982 |
Delaware County is part of the Delaware Valley and borders Philadelphia, the nation's sixth-most populous city, to its northeast. It also is adjacent to the city-county of Philadelphia County and is included in the Philadelphia–Camden–Wilmington, PA–NJ–DE–MD metropolitan statistical area known as the Delaware Valley. Its county seat is Media.
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