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Mercer County, New Jersey
Genealogy, History & Facts

Mercer County, New Jersey Facts

Mercer County

When was Mercer County, NJ Created?
Mercer County was established on February 22, 1838 from Burlington County, Hunterdon County, Middlesex County, and Somerset County. The county was named in honor of Continental Army General Hugh Mercer (1726–1777), who died at the Battle of Princeton.

What is the County Seat of Mercer County, NJ?
The County Seat is located in Trenton plus the county government website is

What counties are adjacent to Mercer County, NJ?
Bordering Counties are Somerset County (north), Middlesex County (northeast), Monmouth County (east), Burlington County (south), Bucks County, Pennsylvania (west), Hunterdon County (northwest).

What cities and towns are in Mercer County, NJ?
Cities and towns located in the County include Trenton. Communities include Grover's Mill, Lawrenceville, Mercerville-Hamilton Square, Princeton Junction, Princeton North, Robbinsville, Titusville, Twin Rivers, White Horse, Windsor, Yardville-Groveville.

What Townships are in Mercer County, NJ?
Townships located in the County include East Windsor, Ewing, Hamilton, Hopewell, Lawrence, Princeton, Washington, West Windsor. Boroughs include Hightstown, Hopewell, Pennington, Princeton.

Mercer County, NJ Vital Records

Where can find Mercer County Birth, marriage, Divorce and Death Records?
Mercer County vital records can be found at the 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. Please refer to the information to the Statewide Vital Records in New Jerseyi for current fees and application process.

You can also order Order Electronically Online or You can download an application for New Jersey Birth Certificate, Marriage Certificate, Divorce Certificate, Death Certificate  Application to mail.

Mercer County, NJ Census Records

What Mercer County, NJ census records are available?
There are many types of census records for Mercer County guide you in researching your family tree. Federal Population Schedules are available for 1840, 1850, 1860, 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

Mercer Co. Mortality Schedules can be found for 1850, 1860, 1870 and 1880. Mercer Co. Industry and Agriculture is available for 1850, 1860, 1870 and 1880. Mercer Co. Union Veterans Schedules is available for 1890. You can get free down-loadable not to mention printable census forms that can help with your research. See Also New Jersey Census Records Research Guide

Mercer County, NJ Courthouse and Government Records

Mercer County Courthouse

What genealogical records can I find in the Mercer County Courthouse?
The below facts shows exactly what death, marriage, birth, property, wills, and court records are typically in Mercer County. The years listed below are the first noted records with this county. See Also New Jersey Corthouse Records Research Guide.

The following information and facts shows exactly what death, marriage, birth, land, probate, and legal records are usually in Mercer County. The years stated below are considered the first widely known records data for this particular county.

Mercer County, NJ Societies and Family History Resources

What genealogical and historical societies, archives, museums, associations and libraries are available for Mercer County, NJ?
A list of Mercer County Historical  and Genealogical Societies, Libraries, Archives. See also list of Statewide New Jersey Archives, Historical & Genealogical Societies.

Where can I connect with other Mercer County, NJ Researchers through message boards and forums?

What other genealogical resources are available in Mercer County, NJ?
The following are web links to Genealogy, Records and Resources pertaining to Mercer County. A majority of these genealogy links fall into 3 categories: Business Sites, Private Sites or Organization Sites. Some have free access some have to have a payment. This is just a directory which has been gathered or submitted. I do not endorse or promote one genealogy site above another.

Mercer Co. NJ Books, Newspapers & Publications

Mercer Co. NJ Cemeteries & Church Records

Mercer Co. NJ Family Websites, Pictures & Histories

Mercer Co. NJ General and History Websites

Mercer Co. NJ Immigration & Naturalization

Mercer Co. NJ Maps, Atlases & Gazetteers

Mercer Co. NJ Military Records

Mercer Co. NJ Schools & Directories

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