Warren County, New Jersey Genealogy Guide

Warren County, New Jersey (Map It) was created on November 20, 1824 from Sussex County. The county was named in honor of American Revolutionary War General Joseph Warren (1741–1775), killed at the Battle of Bunker Hill. Learn More About State of New Jersey History

Warren County is bordered by Sussex County (northeast), Morris County (east), Bucks County, Pennsylvania (south), Hunterdon County (south), Northampton County, Pennsylvania (west), Monroe County, Pennsylvania (northwest) .

Warren County Cities and Towns include Belvidere, Hackettstown, Phillipsburg. Communities include Allamuchy-Panther Valley, Beattystown, Brass Castle, Great Meadows-Vienna, Johnsonburg, Rivers Bear Creek, Beaver Brook, Cory's Brook, Dead River, Delaware River, Lopatcong Creek, Musconetcong River, Paulins Kill, Pequest River, Pohatcong Creek, Pophandusing Creek, Yard's Creek.

Warren County Townships include Allamuchy, Alpha, Belvidere, Blairstown, Franklin, Frelinghuysen, Greenwich, Hackettstown, Hardwick, Harmony, Hope, Independence, Knowlton, Liberty, Lopatcong, Mansfield, Oxford, Phillipsburg, Pohatcong, Washington Twp, and White. Boroughs include Alpha, Washington.

A Map of Warren County, New Jersey contains detailed information about roads and boundaries, these maps may include rural communities, churches, and cemeteries.

Warren County, New Jersey Courthouse Records


Warren County, NJ Courthouse

The Warren County Courthouse is located in Belvidere, New Jersey. Learn More About State of New Jersey 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 following dates indicates what vital, land, probate, and court records are in Warren county. The date listed for each category of record is usually the earliest registration filed. The earliest date does not indicate that there are numerous records for that year and does not mean that all such events were actually registered.

  • Warren County Clerk has Land Records from 1825 and Marriage Records from 1825. The County Clerk is responsible for land records, including deeds and mortgages, naturalizations, marriages (usually 1795-1840s), and various county court records. A few original county justice of the peace dockets are at the New Jersey State Archives.
  • Warren County Surrogate Court / Orphan's Court has Probate Records from 1825. The County Surrogate Court / Orphan's Court probates Wills, appoints Administrators, appoints Guardians for minors, handles applications for Adult Incapacitated Persons, Conservatorships, Adoptions, contested Probate matters, Accountings, Trusts and most other matters involving Estates.
  • Warren County Treasurer is responsible for the collection of taxes.
  • New Jersey Department of Health has copies of Birth, Marriage and Death records from 1878 to the present. There is a fee for each copy requested. Birth, marriage, and death records are connected with central life events.

Warren County, New Jersey Census Records

Warren County, New Jersey Vital Records

Warren County, New Jersey Resources

Warren County, New Jersey External Links