Delaware County, colloquially referred to as Delco, is 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. The county is part of the Philadelphia metropolitan area region of the commonwealth.
- Country
- United States
- Inception
- September 26, 1789
- Website
- http://www.co.delaware.pa.us
