Delaware County records vary vastly from county to county in both quality and quantity. Some have been very carefully maintained while others have been significantly abused and neglected. Some Delaware records have merely vanished. For genealogists carrying out research in Delaware there is no valuable substitute for an on-site search of county court house records. For Definitions of all court terms see the Genealogy Encyclopedia
The origin of the county boundaries goes back to former court districts. Delaware only has three counties, which is less than all other states have. That makes genealogical research a bit easier for Delaware, especially since many of its early records through part of the 1900s have been compiled at the Delaware Public Archives. However, the county recorder of deeds holds land conveyance records, while the office of the register of wills holds estate records from 1925 onward. Meanwhile, divorces up until 1975 and some civil and criminal court records are held by the prothonotary. Each county also has several vital records on file, although many can be found at the Delaware Public Archives.
See also a list of links to county and county seat government run websites.