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Seneca County, Ohio
Genealogy, History & Facts

Seneca County, Ohio Facts

Seneca County

When was Seneca County, OH Created?
Seneca County was created on April 1, 1820 from Huron County and Sandusky County (Organized in 1824). This county was named for the Seneca Indians, who had a reservation in the county area at the time .

What is the County Seat of Seneca County, OH?
The County Seat is located in Tiffin also, the county government website is .

What counties are adjacent to Seneca County, OH?
Bordering Counties are Sandusky County (north), Huron County (east), Crawford County (southeast), Wyandot County (southwest), Hancock County (west), Wood County (northwest) .

What cities and towns are in Seneca County, OH?
Cities and towns located in the County include Bellevue, Fostoria, Tiffin, Attica, Bettsville, Bloomville, Green Springs, New Riegel, Republic. Other communities include Alvada, Bascom, Flat Rock, Kansas, Melmore, Old Fort.

Seneca County Townships Map

What townships are in Seneca County, OH?
Townships located in the County include Adams, Big Spring, Bloom, Clinton, Eden, Hopewell, Jackson, Liberty, Loudon, Pleasant, Reed, Scipio, Seneca, Thompson, Venice.

Seneca County, OH Vital Records

Where can find Seneca County Birth, marriage, Divorce and Death Records?
Seneca 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 Seneca 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 Seneca 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.

Seneca County, OH Census Records

What Seneca County, OH census records are available?
There are many types of census records for Seneca 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.

Seneca Co. Mortality Schedules can be found for 1850, 1860, 1870 and 1880. Seneca Co. Industry and Agriculture can be obtained for 1850, 1860, 1870 and 1880. Seneca 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

Seneca County, OH Courthouse and Government Records

Seneca County Courthouse

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

  • Seneca County Courthouse (all departments listed below are located here, unless otherwise noted)
    • Address: 103 S., Washington St., Tiffin 44883-2352
    • Phone: (419) 447-4550
  • Seneca 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: 108 Jefferson Street Tiffin, Ohio 44883
    • Phone: (419) 447-3121
    • Marriage Records: 1841 
    • Probate Records: 1828
  • Seneca County Recorder has the duty of keeping specific records which may include: deeds, mortgages, military discharges, plats, etc.
    • Address: 109 S Washington Street Suite 2104, Tiffin, OH 44883
    • Phone: 419-447-4434
    • Land Records: 1821
  • Seneca 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.
    • Address: 117 E. Market St., Ste 4101, Tiffin, OH 44883
    • Phone: 419-447-0671
    • Court Records: 1824
  •  Ohio, Wills and Probate Records, 1786-1998
  • BLM Land Records
  • Seneca County USGenWeb Archives Project

Seneca County, OH Societies and Family History Resources

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

  • Seneca County Chapter, OGS, PO Box 157, Tiffin, OH 44883-0157; Phone: (740) 354-3760; Seneca County Chapter, OGS meets at the Tiffin-Seneca Public Library, 77 Jefferson St., Tiffin, OH on the first Tuesday of each month except July, August, and December. This OGS Chapter aids individuals in their research and publishes genealogical material.
  • Seneca County Historical Society, 72 Riverlea Pk, Tiffin, OH 44883-1604; Phone: (419) 447-1834; The Seneca County Historical Society preserves and promotes the history of Tiffin and Seneca County.
  • Attica Area Historical Society, PO Box 226, Attica, OH 44807-0226; Phone: (419) 426-3825; The Attica Area Historical Society is dedicated to preserving the history and traditions of Reed and Venice Townships of Seneca County. At present it has items in the Seneca East Public Library basement.
  • Fostoria Area Historical Society & Museum, PO Box 142, Fostoria, OH 44830-0142; Phone: (419) 435-4664; The Fostoria Area Historical Society, housed in the former Fire Station and City Building built in 1874, exhibits the furniture and documents of Charles Foster used while he was 18th Governor of Ohio and later when he was Secretary of the U.S. Treasury. Additionally, it contains artifacts of the surrounding counties of Seneca, Hancock, and Wood. A rare antique automobile, the 1917 Allen Motor Car was made in Fostoria, and is exhibited along with a 1941 Seagraves Ladder-Pump Fire Truck.
  • 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 Seneca County, OH Researchers through message boards and forums?

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

Seneca Co. OH Books, Newspapers & Publications

Seneca Co. OH Church / Bible Records & Cemeteries / Graveyards

Seneca Co. OH Family Websites, Pictures & Histories

Seneca Co. OH General and History Websites

Seneca Co. OH Immigration & Naturalization

Seneca Co. OH Maps, Atlases & Gazetteers

Seneca Co. OH Military Records

AlpineSeneca Co. OH Schools & Directories

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