Union County, Ohio Genealogy

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

County Facts
County seat: Marysville
Organized: April1,1820[1]
Parent County(s): Delaware, Franklin, Logan, Madison[2]
Neighboring Counties
Hardin  • Marion  • Delaware  • Franklin  • Madison  • Champaign  • Logan
See County Maps
Union County, Ohio Courthouse.jpg
Location Map
OH union.png

County Information[edit | edit source]

Description[edit | edit source]

The county was named after its origins, it being the union of portions of Franklin, Delaware, Madison, and Logan counties. It is located in the West-central area of the state.[3]

County Courthouse[edit | edit source]

Union County Courthouse
215 W 5th Street
Marysville, OH 43040
Phone: 937-645-3006
Union County Website

County recorder has land records from 1819;
Probate Court has birth, marriage, death and probate records[4]

Union 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 1820 1867 1820 1819 1820 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: [7]

Unincorporated communities
Census-designated places

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]

Occupations[edit | edit source]

Cemeteries[edit | edit source]

Cemeteries of Union 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 1,996
1830 3,192 59.9%
1840 8,422 163.8%
1850 12,204 44.9%
1860 16,507 35.3%
1870 18,730 13.5%
1880 22,375 19.5%
1890 22,860 2.2%
1900 22,342 −2.3%
1910 21,871 −2.1%
1920 20,918 −4.4%
1930 19,192 −8.3%
1940 20,012 4.3%
1950 20,687 3.4%
1960 22,853 10.5%
1970 23,786 4.1%
1980 29,536 24.2%
1990 31,969 8.2%
2000 40,909 28.0%
2010 52,300 27.8%
Source: "Wikipedia.org".

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.

Online Land Indexes and Records

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.

  • Curry, William Leontes, History of Union County, Ohio: Its People, Industries and Institutions, with Biographical Sketches of Representative Citizens and Genealogical Records of Many of the Old Families, (Indianapolis, Ind.: B. F. Bowen and Co., 1915). Online at: FamilySearch Digital Library; Internet Archive.
  • Durant, P.A., The History of Union County, Ohio: Containing a History of the County, its Townships, Towns, Military Records, Portraits of Early Settlers and Prominent Men, (Salt Lake City, Utah: Filmed by the Genealogical Society of Utah, 1971). Online at FamilySearch Digital Library.
  • Ohio Indexes at EveryNameIndex.com — Select the county.

Maps and Gazetteers[edit | edit source]

Hardin CountyMarion CountyDelaware CountyFranklin CountyMadison CountyChampaign CountyLogan CountyOH UNION.PNG
Click a neighboring county
for more resources

Migration[edit | edit source]

Military Records[edit | edit source]

Civil War
Civil War service men from Union County served in various regiments. Men often joined a company (within a regiment) that originated in their county. Listed below are companies that were specifically formed in Union County.

-1st Regiment, Ohio Cavalry, Companies D and K
-96th Regiment, Ohio Infantry, Company K, roster

World War I

Naturalization and Citizenship[edit | edit source]

Online Naturalization Indexes and Records

Newspapers[edit | edit source]

Union 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 Union 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 Union County. For state-wide archival repositories, see Ohio Archives and Libraries.

Union County Records Center & Archives
128 S Main St
Suite 114
Marysville, OH 43040

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 Union County. For state-wide library facilities, see Ohio Archives and Libraries.

Marysville Public Library
231 S Plum St
Marysville, OH 43040

Richwood-North Union Public Library
4 E Ottawa St
Richwood, OH 43344-1296

Museums[edit | edit source]

Union County Historical Society Museum
PO Box 303
Marysville, OH 43040

Societies[edit | edit source]

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

Union County Historical Society
246 W 6th St
PO Box 303
Marysville, OH 43040

Union County Genealogical Society
PO Box 438
Marysville, OH 43040-0438

Websites[edit | edit source]

Research Guides[edit | edit source]

References[edit | edit source]

  1. Ohio Historical Boundary Changes - list of all boundary changes by county provided by Newberry Library
  2. Ohio Historical Boundary Changes - list of all boundary changes by county provided by Newberry Library
  3. Genealogy Trails History Group, “Union County, Ohio Genealogy and History”, http://genealogytrails.com/ohio/union/ accessed 2/27/2017.
  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. Ohio Historical Boundary Changes - list of all boundary changes by county provided by Newberry Library
  7. Wikipedia contributors, "Union County, Ohio," in Wikipedia: the Free Encyclopedia, https://en.wikipedia.org/wiki/Union_County,_Ohio, accessed 17 January 2019.