New Castle County, Delaware Genealogy Guide

New Castle County, Delaware (Map It) was created on August 8, 1673 as an Original County (originally named New Amstel County until 1674).. New Castle County was originally named New Amstel County but renamed in 1684. Learn More About State of Delaware History

New Castle County is bordered by Chester County, Pennsylvania (northwest), Delaware County, Pennsylvania (northeast), Gloucester County, New Jersey (northeast), Salem County, New Jersey (east), Kent County, Delaware (south), Kent County, Maryland (southwest), Cecil County, Maryland (west).

New Castle County Cities and Towns include Delaware City, New Castle, Newark, Wilmington, Bellefonte, Clayton, Elsmere, Middletown, Newport, Odessa, Smyrna, Townsend. A Map of New Castle County, Delaware contains detailed information about roads and boundaries, these maps may include rural communities, churches, and cemeteries.

New Castle County Hundreds include Appoquinimink, Blackbird, Brandywine, Christiana, Mill Creek, New Castle, Pencader, Red Lion, St. George's, White Clay, Wilmington.

New Castle County, Delaware Courthouse Records


New Castle County, DE Courthouse

The New Castle County Courthouse is located in Willmington, Delaware. Records of land conveyance are found in the county recorder of deeds' offices. Estates are in the office of the register of wills where files are maintained from 1925. The prothonotary is the clerk with custody of such records as divorces (to 1975), and civil and criminal court matters. Learn More About State of Delaware Court, Tax, Land and Probate Records.

Please contact the each clerk's department to confirm mailing address, hours, fees and other information before visiting or requesting information because contact information sometimes changes.  The Clerk's Office DOES NOT DO RESEARCH.  The documents are available to interested parties, barring confidential issues.  Most staff will assist people in finding the materials, but it is up to the individual to do the research.

The New Castle County record dates below are from the earliest date to present time. Most earlier records and many into the twentieth century have been transferred to the Delaware State Archives, although some counties have microfilms of transferred material.

New Castle County, Delaware Census Records

New Castle County, Delaware Vital Records

New Castle County, Delaware Resources

New Castle County, Delaware External Links