Clinton County Genealogy Search

Clinton County genealogy records begin in 1810, the year the county was formed from Highland and Warren Counties. Wilmington is the county seat and home to the courthouse where most records are kept. Birth, death, marriage, land, and probate records are all available through county offices on East Main Street. The Quaker community played a large role in Clinton County's early settlement, and many family records reflect that heritage. This guide explains where to find the records you need.

Clinton County Genealogy Sources

The Clinton County Courthouse is at 53 E. Main Street, Wilmington, OH 45177. The Clinton County Probate Court holds birth and death records from 1867 to 1908, marriage records from 1810, and probate records from that same year. Call 937-382-1934 for questions. You can get certified copies of marriage licenses and probate documents by visiting the court in person. Staff can guide you through the process if you are not sure what to ask for.

The Clinton County Recorder keeps land records going back to 1810. Deeds, mortgages, and plat maps are all on file there at 53 E. Main Street, Room 137. Call 937-382-1906. Land records are a strong tool for genealogy because they show where ancestors owned property and when they moved. The FamilySearch Wiki for Clinton County gives a full breakdown of all record types and start dates.

Vital Records in Clinton County

The standard Ohio vital records split applies here. The Clinton County Probate Court has birth and death records from 1867 through 1908. After December 20, 1908, the Ohio Department of Health took over birth registration statewide. Death records from 1908 to 1953 are held at the Ohio History Connection archives in Columbus. For more recent deaths, contact the state health department.

Marriage records go back to 1810. That is the full history of Clinton County. These files list the names of both parties, and older records may include ages and places of residence. Under ORC Chapter 3705, all vital events must be registered with local officials according to state rules. ORC Section 3705.09 sets the ten-day deadline for filing birth certificates.

Court records from 1810 are kept by the Clerk of Courts. Divorce records and civil case files are included. Probate records cover wills, estates, guardianships, and adoptions.

Clinton County Historical Society

The Clinton County Historical Society runs the Cowan Lake Museum and maintains research collections in Wilmington. They hold local history materials, family papers, and county documents that can help with genealogy work. The society puts on programs and events throughout the year.

Visit the society's collections in Wilmington for access to photographs, manuscripts, and published county histories.

The Wilmington Public Library keeps a local history collection with materials on Clinton County genealogy. The library offers access to genealogy databases for in-library use. Between the library and the historical society, you can cover a lot of ground on Clinton County family research without leaving Wilmington. The library has county histories, census records, and some local newspapers on microfilm. Staff can help you use the genealogy databases and point you to the right local collections. City directories are also available and can help you track where a family member lived and worked over the years.

Ohio Genealogy Tools for Clinton County

FamilySearch offers free access to Ohio vital records databases online. You do not need a membership to search. The Ohio Genealogical Society provides the Ohio Records Index and other tools if you want a paid membership with broader access. The Ohio History Connection Vital Records Guide is a handy reference for understanding which office holds records based on their date.

The OhioGenealogy.org site pulls together county-level links and research aids for all 88 Ohio counties. It is free to use and can point you to Clinton County resources you might miss on your own. Under Title 37 of the Ohio Revised Code, most public records in Ohio are open to anyone. Adoption files and sealed court records are the main exceptions.

Getting Copies of Clinton County Records

State-level certificates are available through the Ohio Department of Health. The fee is $21.50 per search as of 2025, per ORC 3705.24. Online orders take about three weeks. Mail orders run four to six weeks. Online requests need a credit card. Mail requests take a check or money order.

For local Clinton County records, visit the courthouse in Wilmington on East Main Street. The Probate Court provides certified copies of marriage licenses and estate documents. The Recorder handles deed and land record requests. The Clerk of Courts issues copies of divorce records and civil case files. If you cannot visit in person, call the office you need to ask about their mail-in process.

Clinton County was formed from Highland and Warren Counties in 1810. Check those parent counties for records before that year. The county's Quaker community kept detailed meeting records that often include birth, marriage, and death information. These meeting house records can be especially useful for the years before Ohio required civil registration of vital events in 1867. The Chronicling America database holds Ohio newspapers that may include Clinton County notices and local history. Wilmington College, a Quaker school, also has archives that may hold relevant family and community records for Clinton County researchers.

Nearby Counties

These counties share borders with Clinton County. Your ancestors may have crossed county lines, so checking neighboring records is always a good idea.