Mercer County, Pennsylvania Genealogy

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United States Gotoarrow.png Pennsylvania Gotoarrow.png Mercer County

Mercer County, Pennsylvania
Map of Pennsylvania highlighting Mercer County
Location in the state of Pennsylvania
Map of the U.S. highlighting Pennsylvania
Location of Pennsylvania in the U.S.
Founded 12 March, 1800
County Seat Mercer
Mercer County, Pennsylvania Courthouse.jpg
Address Mercer County Courthouse
138 S. Diamond St.
Mercer, PA 16137-1284
Mercer County Website
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Historical Facts

Parent County

12 March 1800: Mercer County was created 12 March 1800 from Allegheny County. [1]

Boundary Changes

20 March 1849: Lawrence County set off. Mahoning, Neshannock and Slippery Rock Townships, along with a small portion of Shenango and Lackawannock Townships became part of Lawrence County.  This area included the town of New Castle.[2]

Neighboring Counties

Butler | Crawford | Lawrence | Venango | Ohio counties: Mahoning | Trumbull

Record Loss

1866--The First Mercer County Courthouse, built in 1807, was destroyed by fire in February 25, 1866.  All records were saved from the fire.[3][4]

1907--The Second Mercer County Courthouse, built in 1866, was destroyed by fire in December 15, 1907.  All records, except for some early tax records, were saved from the fire.[5][4]


Bible Records


Cemetery records often reveal birth, marriage, death, relationship, military, and religious information.

Online Grave Transcripts Published Grave Transcripts County Cemetery Directories Family History Library WorldCat Names in Stone
USGenWeb-tombstone photos Billion Graves
Pennsylvania Genealogy Epodunk
Pennsylvania Gravestones
Billion Graves
Names in Stone
Access Genealogy

See Pennsylvania Cemeteries for more information.


For tips on accessing Mercer County, Pennsylvania Genealogy Federal (or United States) census records online, see: Pennsylvania Census.

There are no county or state census records available for Pennsylvania. County and city tax records can be used as a substitute when census records are not available.

Church Records

Church records and the information they provide vary significantly depending on the denomination and the record keeper. They may contain information about members of the congregation, such as age, date of baptism, christening, or birth; marriage information and maiden names; and death date. In Pennsylvania, church records are often used as a substitute for birth, marriage, and death information. For general information about Pennsylvania denominations, view the Pennsylvania Church Records wiki page.

Finding Church Records at Other Repositories

Additional church records can sometimes be found using search phrases such as Mercer County, Pennsylvania Genealogy Church Records  in online catalogs like:

County-wide Database – Multi-denominational
Mercer county pennsylvania churches.png
  • "100 years of the Pittsburgh Catholic Diocese 1843–1943". Western Pennsylvania Genealogical Society Quarterly, 17:1. FamilySearch Library book 974.8 B2wg. Contains chronolgy, map, county-by-county information.

Court Records

Court of Common Pleas
Clerk of the Court
Orphan's Court (see Vital Records)

Emigration and Immigration

Ethnic Groups





Published Histories

Land and Property

Land records in Mercer County began in 1800. These records are filed with the Recorder of Deeds office in Mercer, Pennsylvania.

Land and property records can place an ancestor in a particular location, provide economic information, and reveal family relationships. Land records include: deeds, abstracts, indexes, mortgages, leases, grants, sheriff sales, land patents, and maps. Property records include liens as well as livestock brands and estray records.

The following are examples of available resources:

Online Land Records

  • The Recorder of Deeds offers an online search of land records. Guest users can view the index (unspecified date range) for free but fees apply for viewing images (1986–present).

Land Records on Microfilm

Additional Resources

Note that the "Maps" section below also includes maps related to land ownership.

See Pennsylvania Land and Property for more information about using land records, especially about original land warrants, surveys, and patents filed at the state land office.

Additional resources can sometimes be found using search phrases such as Mercer County Pennsylvania Land in online catalogs such as:


1873--Landowner Maps from the Combination Atlas of Mercer County and the State of Pennsylvania, 1873, Mercer County PAGenWeb site.



Naturalization and Citizenship




Indentured Servants


Poorhouse, Almshouse

Probate Records



Mercer County has had three courthouses. The first courthouse, built in 1807 was a two story, square brick structure with wings on the east and west sides. The building was remodeled in 1840, then burned in 1866. The second courthouse, built in 1866 and made of red brick, and included a belfry and town clock, burned in 1907. The third and present courthouse was built in 1909.

Courthouse address:
138 S. Diamond St.
Mercer, PA 16137-1284

Records available:
Births, 1893-1905
Marriages, 1885-present
Wills and probate, 1800- present
Land, 1800-present

Family History Centers
  • Greenville Area Public Library
    330 Main St.
    Greenville, PA 16125-2615
  • Grove City Community Library
    125 West Main Street
    Grove City, PA 16127
  • Mercer Area Library
    145 N. Pitt St.
    Mercer, PA 16137-1206
  • Shenango Valley Community Library
    11 N. Sharpsville Ave.
    Sharon, PA 16146
    (724) 981-4360
  • Mercer County Genealogical Society
    P.O. Box 812
    Sharon, PA 16146-0812
  • Mercer County Historical Society
    119 South Pitt St.
    Mercer, PA 16137-1211
  • Grove City Area Historical Society
    P.O. Box 764
    Grove City, PA 16127
  • The Hermitage Historical Society
    5465 E. State Street
    Hermitage, PA 16148
  • Greenville Historical Society
    94 College Ave.
    Greenville, PA 16125
  • Jamestown Area Historical Society
    405 Summit St.
    Jamestown, PA 16134-9153
  • Stoneboro Community & Historical Society
    Lake St.
    Stoneboro, PA 16153


  • Mercer Soldiers Orphans School has several lists of those who were students, teachers, or administrators of the school.The school started January 1, 1868 and closed in 1890.


Vital Records

Vital records are handled by the County Orphans' Court. Between the years 1852-1855 Pennsylvania made a failed attempt to record birth, marriage and death events at the county level. While the records for that time period are available, there were few events recorded. County marriage records were kept in earnest in 1885. Births and deaths, at the county level, were begun in 1893 and kept through 1905. Abstracts and copies of vital records are available for some counties, but most are incomplete. For the most complete set of records, always contact the County Orphans' Court.


Early births 1893–1905 are located at the County Orphans' Court. See the heading Court Records on this page for contact information.

Indexes for Pennsylvania birth records are available through the Department of of Health for 1906 and 1907. Once an individual is located in the index a non certified Birth certificate can be obtained by writing and sending $3.00 to:

Division of Vital Records
ATTN: Public Records
P.O. Box 1528
New Castle, PA 16103


Pennsylvania marriages are located at the county level. Contact the Mercer County, Pennsylvania Genealogy clerk's office for these records.


Early deaths 1893–1905 are located at the County Orphans' Court. See the heading Court Records on this page for contact information.

Indexes for Pennsylvania death records are available through the Department of Health for 1906 through 1962. Once an individual is located in the index a non certified death certificate can be obtained obtained by writing and sending $3.00 to:

Division of Vital Records
ATTN: Public Records
P.O. Box 1528
New Castle, PA 16103

  • 1852-1854 – Pennsylvania Deaths – ($) Index with images.

Finding Vital Records at Other Repositories

Additional vital records can sometimes be found using search phrases such as Mercer County, Pennsylvania Genealogy Vital Records in online catalogs like:

Web Sites


Populated Places

Farrell | Fredonia | Greenville | Grove City | Hermitage (Hickory Township) | Jamestown | Mercer | Milledgeville | Orangeville | Sandy Lake | Sharpsville | Sharon | Sheakleyville | Stoneboro | Transfer | West Middlesex | Wheatland


  1. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), [FHL book 973 D27e 2002].
  2. Mercer County 1840 Map showing portion ceded to Lawrence County in 1849 Mercer County PAGenWeb site
  3. Mercer, PA Mercer County Courthouse Fire, Feb 1866
  4. 4.0 4.1 History of the Mercer County Courthouse
  5. Mercer, PA Mercer County Courthouse Fire, Dec 1907