Delaware County is a county located in the southeastern corner of the U.S. state of Pennsylvania, with a population of 562,960 as of the 2020 census. The county was created on September 26, 1789, from part of Chester County and named for the Delaware River. The county seat is Media.

The county government is composed of three commissioners, who are elected every four years.

The county is home to several institutions of higher education, including Swarthmore College, Villanova University, Widener University, and Delaware County Community College. It is also home to the Delaware County Courthouse, the county government center, and the Delaware County Institute of Science.

The county contains a wide variety of cultural and recreational opportunities, including the state parks, trails, and scenic byways. There are numerous museums, historical sites, golf courses, shopping centers, and other attractions, as well as numerous municipalities, many of which are located in old-fashioned kept towns.

For the most up-to-date and in-depth information, please check the public records links below.