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Delaware County

County in 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. Wikipedia
Cities: Springfield, Media, Chester, and more
Population: 573,849 (2021)
Area: 191 mi²
Congressional district: 5th
Designated: October 3, 1982
Founded: September 26, 1789
Largest Township: Upper Darby