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. The county is part of the Southeast Pennsylvania region of the state.
Delaware County Courthouse in Media, Pennsylvania
The old Chester Courthouse, built in 1724
Bartram's Covered Bridge, built 1860 west of Newtown Square, crosses Crum Creek into Chester County
Newlin Mill, built 1704, on the west branch of Chester Creek, near Concordville
New Sweden
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New Sweden was a colony of the Swedish Empire along the lower reaches of the Delaware River between 1638 and 1655 in present-day Delaware, Maryland, New Jersey, and Pennsylvania in the United States. Established during the Thirty Years' War when Sweden was a great power, New Sweden formed part of the Swedish efforts to colonize the Americas.
The C. A. Nothnagle Log House in Gibbstown, New Jersey, built in 1638 in New Sweden, is the oldest house in New Jersey.
A U.S. Postal stamp commemorating the founding of Wilmington, Delaware, once part of New Sweden (1938)
Old Swedes Church, built in the era of New Sweden, in Swedesburg, Pennsylvania