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Mercer County, Pennsylvania
Genealogy, History & Facts
County Vital Records ∣ County Census Records ∣ County Courthouse and Government Records ∣
County Societies, Family History Resources and County Genealogy Links
Mercer County, Pennsylvania Facts
When was Mercer County, PA Created?
Mercer County was established on March 12, 1800 from Allegheny County.
What is the County Seat of Mercer County, PA?
The County Seat is located in Mercer and in addition the county government website is www.mcc.co.mercer.pa.us/
What counties are adjacent to Mercer County, PA?
Bordering Counties are Crawford County, Venango County, Butler County, Lawrence County, Mahoning County, Ohio, Trumbull County, Ohio.
Mercer County, PA Vital Records
Where can find Mercer County Birth, marriage, Divorce and Death Records?
Mercer County vital records can be found at the Pennsylvania Office of Vital Records has copies of birth and death records since 1906 and death records. There is a fee for each copy requested. Please refer to the information to the Statewide Vital Records in Pennsylvania for current fees and application process. Birth, marriage, and death records are connected with central life events.
You can search online for Mercer County Birth, Marriage, Divorce or Death Records. You can also Order Electronically Online or can download an application for Pennsylvania Birth Certificate, Death Certificate Applications to mail.
- U.S., Social Security Applications and Claims Index, 1936-2007
- USGenweb Archives Pennsylvania Marriage Project
- Pennsylvania Vital Records, Vol. I, Vol. II, Vol. III
- Pennsylvania, Births and Christenings, 1709-1950
- Pennsylvania, Marriages, 1709-1940
- Pennsylvania County Marriages, 1885 – 1950
- Pennsylvania, Philadelphia City Death Certificates, 1803-1915
Mercer County, PA Census Records
What Mercer County, PA 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 1790-1890, 1900, 1910, 1920, 1930, 1940.
Mercer Co. Mortality Schedules can be obtained for 1850, 1860, 1870 and 1880. Mercer Co. Industry and Agriculture Schedules can be acquired for 1850, 1860, 1870 and 1880. Mercer Co. Union Veterans Schedules can be found for 1890. You can find free down-loadable and also printable census forms to help you with your research. See Also Pennsylvania Census Records Research Guide
Mercer County, PA Courthouse and Government Records

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 Pennsylvania Courthouse Records Research Guide.
- Mercer County Courthouse (all departments listed below are located here, unless otherwise noted)
- Address: Mercer County Courthouse, Mercer, PA 16137
- Phone: (724) 662-3800
- Mercer County Recorder of Deeds
- Phone: (724) 662-3800
- Land Records: 1803
- Mercer County Prothonotary / Clerk of Courts
- Phone: (724) 662-7561
- Court & Divorce Records: 1804
- Mercer County Register of Wills/ Orphan’s Court Clerk
- Phone: (724) 662-3800
- Marriage & Probate Records: 1804
- Birth & Death Records: before Jan 1906
- Pennsylvania, Wills and Probate Records, 1683-1993
- Early Pennsylvania Land Records
- BLM Land Records
Mercer County, PA Societies and Family History Resources
What genealogical and historical societies, archives, museums, associations and libraries are available for Mercer County, PA?
A list of Mercer County Historical and Genealogical Societies, Libraries, Archives. See also list of Statewide Pennsylvania Archives, Historical & Genealogical Societies.
- Pennsylvania Archives – Pennsylvania Historical & Museum Commission (fold3.com)
- Mercer County Historical Society , 119 South Pitt Str, Mercer, Pennsylvamia 16137
- Mercer County Genealogical Society, Box 812Sharon, PA 16146-0812
- The Pennsylvania Archives Online
- Pennsylvania State Archives, 350 North Street, Harrisburg, PA 17120; Phone:(717) 783-3281
- Genealogical Society Of Pennsylvania, 2207 Chestnut Street Philadelphia, PA 19103; (215) 545-0391
- Historical Society Of Pennsylvania. 1300 Locust Street, Philadelphia, PA 19107; Phone: 215-732-6200
- State Library of Pennsylvania, Commonwealth Avenue and Walnut Street, P.O. Box 1601, Harrisburg, PA 17105-1601
Where can I connect with other Mercer County, PA Researchers through message boards and forums?
- https://www.archives.gov/research/census
- Pennsylvania Genealogy Network Community (plus.google.com)
- State of Pennsylvania Genealogy Network (facebook.com)
- Mercer County, Pennsylvania Message Boards (boards.ancestry.com)
- Mercer County, Pennsylvania Genealogy Forum (genforum.genealogy.com)
What other genealogical resources are available in Mercer County, PA?
The following are web links to Genealogy, Records and Resources pertaining to Mercer County. Each of these genealogy links fall into 3 categories: Business oriented Sites, Private Sites or Organization Sites. Some have free access some require a cost. This is basically a listing which has been compiled or submitted. I do not recommend or promote one genealogy site over another.
Mercer Co. PA Maps, Atlases & Gazetteers
- See Also Map of Pennsylvania Links and Information
- Mercer Co. D.O.T. Map
- Map of Mercer County, PA with Municipal Labels showing Boroughs (red), Townships (white), and Census-designated places (blue).
- Combination atlas of the county of Mercer and the state of Pennsylvania : from actual surveys & official records (search.ancestry.com)
- 1895 Mercer County Map (livgenmi.com)
Mercer Co. PA Books, Newspapers & Publications
- Pennsylvania Newspapers Books & Publications Research Guide
- Pennsylvania historical newspaper archives online (newspapers.com)
- Historical Newspapers from Pennsylvania (1719 – 1997) (genealogybank.com) Quickly find names and keywords in over 450 million articles, obituaries, marriage notices, birth announcements and other items published in over 2,800 historical U.S. newspapers. New content added monthly!
- Mercer County, Pennsylvania Books (amazon.com)
- Search Pennsylvania Obituaries (1985 to current) (genealogybank.com)
- Mercer County Genealogy Books (books.google.com)
Mercer Co. PA Church / Bible Records & Cemeteries / Graveyards
- Pennsylvania Cemetery Records Research Guide
- Mercer Co., Pennsylvania Graves (findagrave.com)
- Mercer County Tombstone Transcription Project (usgwtombstones.org)
- Mercer Co., Pennsylvania Cemeteries (Internment.net)
- Mercer Co., Pennsylvania Cemetery Books (amazon.com)
- Pennsylvania Church Records Research Guide
- Pennsylvania, Church and Town Records, 1708-1985 (search.ancestry.com)
- Mercer County, Pennsylvania Church Books (amazon.com)
Mercer Co. PA Family Websites, Pictures & Histories
- Create a Free Family Tree (ancestry.com)
- Mercer Co., PA GenWeb Archives Biographies & Collections (usgwarchives.net)
- Genealogies of Pennsylvania Families from the Pennsylvania Genealogical Magazine (search.ancestry.com)
Mercer Co. PA General and History Websites
- Mercer County, Pennsylvania Wikipedia (wikipedia.org)
- History of Mercer County, Pennsylvania : its past and present : including its aboriginal history, its early settlement and deve (search.ancestry.com)
- Mercer County, Pennsylvania Wiki (familysearch.org)
- Mercer Co. PA Genealogy (kindredtrails.com)
- Family History Library (familysearch.org)
- Mercer County, Pennsylvania (linkpendium.com)
- Cyndi’s List – United States – Pennsylvania – Counties – Mercer (cyndislist.com)
- Mercer County Pennsylvania (genealogytrails.com)
- Mercer Co. PAGenweb (rootsweb.ancestry.com)
- Mercer County Genealogy Queries (cousinconnect.com)
- Mercer County, Pennsylvania USGenWeb Archives (usgwarchives.net)
- Mercer Co. Data Collections (search.ancestry.com)
Mercer Co. PA Immigration & Naturalization
- Pennsylvania, Naturalizations, 1794-1908 (search.ancestry.com)
Mercer Co. PA Military Records
- Pennsylvania Military Records Research Guide
- Pennsylvania Military Records (fold3.com) offers access to military records, stories, photos, and personal documents belonging to the Pennsylvania both males and females who served. Excellent for Mercer County genealogists, researchers, historians and a lot more.