Formed 1820 from Huron County · county seat Tiffin. Repository addresses, online record links, and a free printable record checklist below.
Short episodes that walk through Seneca County's records, one record type at a time.
Formation · Settlers & Migration · Probate · Land · Tax · Churches · Newspapers · Where to Look
Watch on YouTube103 E. Market St., Suite 301, Tiffin, OH 44883 · (419) 447-3121
Estate administration, guardianships, adoptions, name changes, and marriage licenses (appointment recommended). Also holds birth records from before 1908.
Some sources list this office at 117 E. Market St. — likely the same courthouse building; confirm suite before visiting.
109 S. Washington St., Suite 2104, Tiffin, OH 44883 · (419) 447-4434
senecacountyohio.gov — County Quick Links
Deeds, mortgages, liens, plats, and leases. Online index covers instruments recorded from August 1987 forward.
103 E. Market Street, Suite 101, Tiffin, OH 44883 · (419) 447-0671
Divorces, civil suits (including partition suits that divide land among heirs), and Common Pleas journals. Before 1852, this court also handled wills and estates.
109 S. Washington Street, Suite 2206, Tiffin, OH 44883 · (419) 447-0692
Current tax lists and property transfer records. Early tax duplicates are on FamilySearch and at the Ohio History Connection.
77 Jefferson St., Tiffin, OH 44883 · (419) 447-3751
tiffinsenecalibrary.org/findinfo/genealogy
Dedicated genealogy and local-history collection staffed by a genealogy specialist. Out-of-town researchers should schedule ahead; also hosts the OGS chapter's monthly meetings.
PO Box 157, Tiffin, OH 44883 · (740) 354-3760
Meets 1st Tuesday monthly (except Jul, Aug, Dec) at the Tiffin-Seneca Public Library. A separate organization from the Seneca County Museum below.
28 Clay St., Tiffin, OH 44883 · (419) 447-5955
County historical museum housed in the 1853 Rezin Shawhan home, with a library/research center. Distinct from the OGS chapter above.
71 S. Washington St., Suite 1102, Tiffin, OH 44883 · (419) 447-3691 ext. 6301
senecahealthdept.org — Birth & Death
Certified birth certificates for anyone born in Ohio, 1908–present; certified death certificates for deaths occurring in Seneca County, 1908–present. Births before 1908 are held at Probate Court.
Not sure which office has what? See Which County Office Holds What.
Many Seneca County record books are filmed and free to view at FamilySearch (free account required).
In Full-Text Search, add Seneca County, Ohio as the place to find names inside handwritten deeds, wills, and court books. How to use it.
Seneca County was formed in 1820 from Huron County. For records made before then, search the parent county:
Most of Seneca County's land was federal Congress Lands, surveyed in townships and sections and first sold through U.S. land offices. The first buyer of each tract received a federal patent.
Titles that covered Seneca 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 |
|---|---|---|
| Seneca Patriot | 1832-1833 | Chronicling America (Library of Congress) |
| The Seneca Advertiser | 1842-1890 | Chronicling America (Library of Congress) |
| Semi-Weekly Seneca Advertiser | 1890-1894 | Chronicling America (Library of Congress) |
| Tiffin Tribune / Weekly Tribune | 1848-1919 | Chronicling America (1848-1887); rest microfilm — Tiffin-Seneca Public Library |
| Daily Advertiser | 1886-1933 | Chronicling America (partial); microfilm — Tiffin-Seneca Public Library |
| Advertiser-Tribune | 1933-present | Microfilm/library archive — Tiffin-Seneca Public Library; recent issues on paper's own site |
Fill in what you're looking for, print it, and take it with you to the courthouse or library.
Brick Walls & Buckeyes
brickwallsbuckeyes.com · Seneca County, Ohio
Addresses and links last checked October 2026.
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