Mercer County, Ohio Genealogy

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Guide to Mercer County, Ohio ancestry, genealogy and family history, birth records, marriage records, death records, census records, family history, and military records.

County Facts
County seat: Celina
Organized: January 2, 1824 [1]
Parent County(s): Darke[2]
Neighboring Counties
Van Wert  • Auglaize  • Shelby  • Darke  • Randolph (IN)  • Jay (IN)  • Adams (IN)
Mercer County, Ohio Courthouse.jpg
Location Map
OH mercer.png

County Information[edit | edit source]

Description[edit | edit source]

The county was named Hugh Mercer, an officer in the American Revolutionary War. It is located in the West-Central area of the state.[3]

County Courthouse[edit | edit source]

Mercer County Courthouse
101 N Main St
PO Box 28
Celina, OH 45822
Phone: 419-586-6461
Mercer County Website

Probate Judge has birth and death records 1867-1908,
Marriage records from 1830 and probate records from 1829;
Clerk Court has court records from 1824;
County Recorder has land records.[4]

Mercer County, Ohio Record Dates[edit | edit source]

Information for this chart was taken from various sources, often containing conflicting dates. This information should be taken as a guide and should be verified by contacting the county and/or the state government agency.

Known Beginning Dates for Major County Records[5]
Birth* Marriage Death* Court Land Probate Census
1867 1830 1867 1824 1823 1829 1820
Statewide registration for births and deaths started in 1908. General compliance year is unknown.

Record Loss[edit | edit source]

There is no known history of courthouse disasters in this county.

Boundary Changes[edit | edit source]

Populated Places[edit | edit source]

For a complete list of populated places, including small neighborhoods and suburbs, visit Hometown Locator. The following are the most historically and genealogically relevant populated places in this county: [8]

Unincorporated communities

History Timeline[edit | edit source]

Resources[edit | edit source]

Bible Records[edit | edit source]

For an extensive list of resources for Bible Records see Ohio Bible Records.

Biographies[edit | edit source]

Business, Commerce, and Occupations[edit | edit source]

Cemeteries[edit | edit source]

Cemeteries of Mercer County, Ohio online and in print
Tombstone Transcriptions Online
Tombstone Transcriptions in Print (Often more complete)
List of Cemeteries in the County
See Ohio Cemeteries for more information.


Census Records[edit | edit source]

Historical populations
Census Pop.
1820 95
1830 1,110 1068.4%
1840 8,277 645.7%
1850 7,712 −6.8%
1860 14,104 82.9%
1870 17,254 22.3%
1880 21,808 26.4%
1890 27,220 24.8%
1900 28,021 2.9%
1910 27,536 −1.7%
1920 26,872 −2.4%
1930 25,096 −6.6%
1940 26,256 4.6%
1950 28,311 7.8%
1960 32,559 15.0%
1970 35,265 8.3%
1980 38,334 8.7%
1990 39,443 2.9%
2000 40,924 3.8%
2010 40,814 −0.3%
Source: "".

Church Records[edit | edit source]

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. For general information about Ohio denominations, see Ohio Church Records.
List of Churches and Church Parishes

Court Records[edit | edit source]

Directories[edit | edit source]

Emigration and Immigration[edit | edit source]

Ethnic, Political, and Religious Groups[edit | edit source]

Funeral Homes[edit | edit source]

Genealogies[edit | edit source]

Guardianship[edit | edit source]

Land and Property Records[edit | edit source]

Land and property records can place an ancestor in a particular location, provide economic information, and reveal family relationships. Land records include: deeds, abstracts and indexes, mortgages, leases, grants and land patents.

See Ohio Land and Property for additional information about early Ohio land grants. After land was transferred to private ownership, subsequent transactions were usually recorded at the county courthouse and where records are currently housed.

Local Histories[edit | edit source]

Local histories are available for this county. County histories may include biographies, church, school and government history, and military information. For more information about local histories, see Ohio Local Histories.

Maps and Gazetteers[edit | edit source]

Van Wert CountyAllen CountyAuglaize CountyShelby CountyDarke CountyAdams CountyJay CountyOH MERCER.PNG
Click a neighboring county
for more resources

Migration[edit | edit source]

Military Records[edit | edit source]

World War I

Naturalization and Citizenship[edit | edit source]

Online Naturalization Indexes and Records

Newspapers[edit | edit source]

Mercer County newspapers often contain genealogical value including obituaries, births, marriages, deaths, anniversaries, family gatherings, family travel, achievements, business notices, engagement information, and probate court proceedings.

Obituaries[edit | edit source]

Other Records[edit | edit source]

Periodicals[edit | edit source]

Probate Records[edit | edit source]

From 1797 or the creation of the county, probate records were held by the Court of Common Pleas. After 1852, records are held by the Mercer County Probate Court. Records include wills, estates, guardianships, naturalizations, marriage, adoption, and birth and death records (1867-1908 only). The records may give the decedent's date of death, name of spouse, children, parents, siblings, in-laws, neighbors, associates, relatives, and their place of residence.

See Ohio Probate Records for information about how to use probate records.

Online Probate Indexes and Records

School Records[edit | edit source]

Social Security Records[edit | edit source]

Tax Records[edit | edit source]

Ohio tax records complement land records and can be used in place of censuses before 1820 or to supplement the years between censuses. Because only persons who owned taxable property were listed, many residents were not included in tax lists. There may also be gaps of several years in the tax records of some counties.

Online Tax Indexes and Records

Vital Records[edit | edit source]

Vital records consist of birth, death, marriage and divorce records. Marriages were usually recorded from the formation of the county and are held at the office of the County Probate Court. Divorce records are located with the county Clerk of Courts.

Any existing birth and death records from 1867 through December 19, 1908 are located at the County Probate Court. The Ohio Department of Health has birth records filed after December 20, 1908 and death records filed after January 1, 1954, while the Ohio History Connection houses death records from December 20, 1908 through December 31, 1953.

Birth[edit | edit source]

Marriage[edit | edit source]

Death[edit | edit source]

Divorce[edit | edit source]

Research Facilities[edit | edit source]

Archives[edit | edit source]

Listed below are archives in Mercer County. For state-wide archival repositories, see Ohio Archives and Libraries.

Family History Centers[edit | edit source]

Family History Center and Affiliate Library Locator map - search for local Family History Centers or Affiliate Libraries

  • Family History Centers provide one-on-one assistance, free access to center-only databases, and to premium genealogical websites.
  • FamilySearch Affiliate Libraries have access to most center-only databases, but may not always have full services normally provided by a family history center.

Local Centers and Affiliate Libraries

Libraries[edit | edit source]

Listed below are libraries in Mercer County. For state-wide library facilities, see Ohio Archives and Libraries.

Coldwater Public Library
305 W Main St
Coldwater, OH 45828-1604

Fort Recovery Public Library
113 N Wayne St
PO Box 309
Fort Recovery, OH 45846

Mercer County District Public Library
Main Branch
303 N Main St
Celina, OH 45822-1698

Rockford Carnegie Library
162 S Main St
PO Box 330
Rockford, OH 45882

Museums[edit | edit source]

Mercer County Historical Museum Celina
130 E Market St
Celina, OH 45822

Fort Recovery State Museum
1 Fort Site St
PO Box 533
Fort Recovery, OH 45846

The Shrine of the Holy Relics
2291 St Johns Rd
Maria Stein, OH 45860

Societies[edit | edit source]

Listed below are societies in Mercer County. For state-wide genealogical societies, see Ohio Societies.

Mercer County Chapter of OGS
PO Box 437
Celina, OH 45822

Websites[edit | edit source]

Research Guides[edit | edit source]

References[edit | edit source]

  1. [ Ohio Atlas of Historical County Boundaries] Ohio: Individual County Chronologies; Copyright The Newberry Library 2007
  2. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Ohio.At various libraries (WorldCat); FHL Book 973 D27e 2002.
  3. Genealogy Trails History Group, “Mercer County, Ohio Genealogy and History”, accessed 2/22/2017.
  4. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Ohio.At various libraries (WorldCat); FHL Book 973 D27e 2002.

  5. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Ohio.At various libraries (WorldCat); FHL Book 973 D27e 2002.
  6. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Ohio.At various libraries (WorldCat); FHL Book 973 D27e 2002.
  7. [ Ohio Atlas of Historical County Boundaries] Ohio: Individual County Chronologies; Copyright The Newberry Library 2007
  8. Wikipedia contributors, "Mercer County, Ohio," in Wikipedia: the Free Encyclopedia,,_Ohio, accessed 3 January 2019.