Formed April 1, 1820 from parts of Delaware, Franklin, Madison, and Logan counties — named for the "union" of those four counties' territory · county seat Marysville. Repository addresses, online record links, and a free printable record checklist below.
Short episodes that walk through Union County's records, one record type at a time.
Formation · Settlers & Migration · Probate · Land · Tax · Churches · Newspapers · Where to Look
Watch on YouTube215 West Fifth St., Room B06, Marysville, OH 43040 · (937) 645-3029
unioncountyohio.gov/probatedivision
Wills, estates, guardianships, adoptions, and marriage records 1820–present. Also holds birth and death records 1867–1909, before the state health-department system began.
233 West Sixth St., Marysville, OH 43040 · (937) 645-3032
Deeds, mortgages, liens, plats, and veterans' discharge records. Online images/indexes cover 1995–present, with deed indexes back to 1875.
215 W. Fifth Street, Marysville, OH 43040 · (937) 645-3006
unioncountyohio.gov/clerk-of-courts-4
Divorces, civil suits (including partition suits that divide land among heirs), and Common Pleas journals. Before 1852, this court also handled wills and estates.
233 W. Sixth Street, Marysville, OH 43040 · (937) 645-3003
Current tax lists and property transfer records. Early tax duplicates are on FamilySearch and at the Ohio History Connection.
231 S. Plum St., Marysville, OH 43040 · (937) 642-1876
marysvillelib.org — Genealogy & Local History
Historic newspapers on microfilm (Marysville Tribune 1849–1938, Union County Journal 1876–1951, Richwood Gazette 1872–2000, and more), probate birth/will/marriage/naturalization record microfilm, in-library Ancestry Library Edition, and a FamilySearch Affiliate Library designation. Hosts the OGS chapter's meetings.
Meets at Marysville Public Library, 231 S. Plum St., 3rd Saturday monthly, 10am (no meetings Dec–Feb or July)
Active since 1979, OGS-chartered 1980. Publishes the newsletter Union County Echoes and maintains digitized WPA cemetery maps for the county's townships.
246 West 6th St., Marysville, OH 43040 · (937) 644-0568
uchsohio.org · seasonal hours, check site for current schedule
A different organization from the genealogical society above — a museum in two connected historic houses with period artifacts and exhibits on local figures like VP Charles W. Fairbanks and O.M. Scott.
940 London Ave., Suite 1100, Marysville, OH 43040 · (937) 642-2053
Births and deaths from 1909 forward. Records from 1867–1909 are at the Probate Court above.
Interment.net — Union County and OhioGravestones.org, plus the OGS chapter's own WPA cemetery maps.
Not sure which office has what? See Which County Office Holds What.
Many Union County record books are filmed and free to view at FamilySearch (free account required).
In Full-Text Search, add Union County, Ohio as the place to find names inside handwritten deeds, wills, and court books. How to use it.
Union County was formed in 1820 from Franklin, Madison, Logan, and Delaware Counties. For records made before then, search the parent counties:
All of Union County lies in the Virginia Military District, land Virginia set aside for its Revolutionary War veterans. It was surveyed in irregular metes and bounds, and the first owners' records follow a warrant, entry, survey, and patent trail.
Titles that covered Union County, historic and current, with where to search each one. Not every historic title has been digitized — several survive only on microfilm.
| Title | Years | Where to Search |
|---|---|---|
| Union Star / Union Gazette / Freedom and Union County Advertiser | 1839-1844 | Digitized PDFs — Union County Historical Society (uchsohio.org) |
| The Argus (and Argus and Union County Advertiser) | 1844-1849 | Digitized PDFs — Union County Historical Society |
| Marysville Tribune | 1849-1939 | Chronicling America (LOC); select issues on UCHS site; microfilm — Marysville Public Library |
| Union Press / Union County Democrat | 1858-1864 | Digitized PDFs (partial) — Union County Historical Society |
| Union County Journal | 1875-1951 | Fully searchable on Chronicling America |
| Marysville Journal-Tribune | 1951-present | Newspapers.com (marysvillejt.newspapers.com archive); microfilm — Marysville Public Library |
Fill in what you're looking for, print it, and take it with you to the courthouse or library.
Brick Walls & Buckeyes
brickwallsbuckeyes.com · Union County, Ohio
Addresses and links last checked October 2026.
County guides, record walkthroughs, and brick wall breakthroughs. Subscribe on YouTube and tap the bell so new episodes find you.
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