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Union County, Ohio
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Union County, Ohio Facts

Union County

When was Union County, OH Created?
Union County was created on April 1, 1820 from Delaware County, Franklin County, Logan County and Madison County. This county was named as such due to it formed by a union of four counties .

What is the County Seat of Union County, OH?
The County Seat is located in Marysville also, the county government website is www.co.union.oh.us .

What counties are adjacent to Union County, OH?
Bordering Counties are Marion County (northeast), Delaware County (east), Franklin County (southeast), Madison County (south), Champaign County (southwest), Logan County (west), Hardin County (northwest) .

Union County Townships Map

What cities and towns are in Union County, OH?
Cities and towns located in the County include Dublin, Marysville, Magnetic Springs, Milford Center, Plain City, Richwood, Unionville Center. Other communities include Broadway, Chuckery, Irwin, New California, Raymond.

What townships are in Union County, OH?
Townships located in the County include Allen, Claibourne, Darby, Dover, Jackson, Jerome, Leesburg, Liberty, Millcreek, Paris, Taylor, Union, Washington, York.


Union County, OH Vital Records

Where can find Union County Birth, marriage, Divorce and Death Records?
Union County vital records can be found at the Ohio Department of Health which has Birth Records since Dec 20, 1908; Death Records since since 1954 and copies of Marriage and Divorce Records since 1918 to present There is a fee for each copy requested. Please refer to the information to the Statewide Vital Records in Ohio for current fees and application process.

You can search online for Union County Birth, Marriage, Divorce or Death Records. You can also Order Electronically Online or can download an application for Ohio Birth Certificate, Marriage Certificate, Divorce Certificate, Death Certificate Application to mail. The Archives Division has copies of births before 1908, death before 1944 and marriage records before 1949.

The Union County Health Department has Birth & Death Records from 1908-Present. For birth and death records prior to Dec. 20, 1908, contact the Probate Court of this county.


Union County, OH Census Records

What Union County, OH census records are available?
There are many types of census records for Union County guide you in researching your family tree. Federal Population Schedules are available for 1820, 1830, 1840, 1850, 1860, 1870, 1880 (free index), 1890 (fragment), 1900, 1910, 1920, 1930, 1940.

Union Co. Mortality Schedules can be found for 1850, 1860, 1870 and 1880. Union Co. Industry and Agriculture can be obtained for 1850, 1860, 1870 and 1880. Union Co. Union Veterans Schedules is available for 1890. One can find free online and printable census forms to help you with your research. See Also Ohio Census Records Research Guide


Union County, OH Courthouse and Government Records


Union County Courthouse

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

  • Union County Courthouse (all departments listed below are located here, unless otherwise noted)
    • Address: 215 West Fifth Street, Marysville, Ohio 43040
    • Phone: (937) 645-3012
  • Union County Clerk of Probate Court handles the probating of wills, estate administrations, trusts, guardianships, adoptions, birth corrections, delayed birth registrations and issues marriage licenses. The Probate Court is that the Probate Judge is the ex-officio Clerk of Courts, thus, the Court performs all the duties as its own Clerk of Courts
    • Address: 128 S. Main Street, Marysville, Ohio 43040
    • Phone: 937-645-3029
    • Marriage Records: 1820 
    • Probate Records: 1820
  • Union County Recorder has the duty of keeping specific records which may include: deeds, mortgages, military discharges, plats, etc.
    • Address: 1st Floor, County Office Building, 233 West Sixth Street, Marysville
    • Phone: 937-645-3032
    • Land Records: 1811
  • Union County Clerk of Court of Common Pleas is responsible for duties that include filing, docketing, indexing, and preserving all court pleadings for civil, felony criminal and domestic relations cases. Other services provided by the Clerk of Court of Common Pleas are administering oaths, keeping naturalization records, and recording and retention of coroner records.
    • Phone: 937.645.3015
    • Court Records: 1820
  • Union Co. Land Records
  • Union Co. Court Records
  • Union Co. Wills
  • BLM Land Records
  • Union County USGenWeb Archives Project

Union County, OH Societies and Family History Resources

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

  • Union County Chapter, OGS, PO Box 438, Marysville, OH 43040-0438; Phone: (937) 642-1876; Union County Chapter, OGS meets in the lower level Meeting Room at the Public Library, 231 S. Plum St., Marysville, OH at 7:00pm on the third Tuesday of the month, except in December. This OGS Chapter preserves historical records of Union County and related areas. The group publishes materials compiled by the Chapter and collects genealogical data for Marysville, Richwood, and Plain City local libraries.
  • Union County Historical Society , PO Box 303, Marysville, OH 43040-0303; Phone: (937) 642-1972; The Union County Historical Society and Museum specialize in collecting and exhibiting Union County history.
  • Raymond-Newton Historical Society, 23387 Dayton Ave, Raymond, OH 43067-9701; Phone: (937) 246-3641; The Raymond-Newton Historical Society collects and presents the local history of the area. It has published four books about the community.
  • Ohio Historical Society, Archives-Library Division,  1982 Velma Avenue, Columbus, OH 43211; Telephone: 614-297-2300
  • Ohio Genealogical Society, 713 South Main Street, Mansfield OH 44907-1644

Where can I connect with other Union County, OH Researchers through message boards and forums?

What other genealogical resources are available in Union County, OH?
The following are web links to Genealogy, Records and Resources pertaining to Union County.

Union Co. OH Books, Newspapers & Publications

Union Co. OH Cemeteries & Graveyards

Union Co. OH Family Websites, Pictures & Histories

Union Co. OH General and History Websites

Union Co. OH Immigration & Naturalization

Union Co. OH Maps, Atlases & Gazetteers

Union Co. OH Military Records

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