Hamilton County, Ohio Genealogy

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United States
Hamilton County

Guide to Hamilton County, Ohio ancestry, family history, and genealogy birth records, marriage records, death records, census records, family history, and military records.


Hamilton County, Ohio
Boundary map of Hamilton County, Ohio
Map of the U.S. highlighting Ohio
Location of Ohio in the U.S.
Hamilton County, Ohio Courthouse.jpg
Address Hamilton County Courthouse
1000 Main Street
Cincinnati, Ohio 45202
Hamilton County Website

Quick Dates

Births and deaths were recorded at the local, county and state level in various time periods.  Some births and deaths were recorded in multiple locations and the information in those records varies.  Hamilton County's civil records start in the following years:[1][2]

Locality Birth Marriage Death Census Land Probate
Ohio (State Recording)
1908 -- -- --
Hamilton County 1875 1817 1891 1820 1794 1791
Anderson Twp 1898 1907
Cincinnati 1874
1865 -- -- --
Norwood 1908
1908 -- -- --
St. Bernard 1889
1889 -- -- --
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Boundary Changes

For animated maps illustrating Ohio county boundary changes, "Rotating Formation Ohio County Boundary Maps" (1788-1888) may be viewed for free at the MapofUS.org website.

Record Loss

  • 1814, 1849, 1884 Courthouse fires may have damaged or destroyed some records. [3] 
  • Lost census: 1810

For suggestions about research in places that suffered historic record losses, see:

Governmental Repositories

County Courthouses

County Clerk of Courts

Hamilton County Courthouse
1000 Main St.
Cincinnati, Ohio 45202

Probate Judge has marriage, burial and probate records;
County Health Department has death records; Clerk Court
has divorce and court records from 1900; County Recorder
has land records[4]

Directions and Parking

Online index to Divorces (1994-present), Civil and Criminal Cases (1989-present), Common Pleas (1997-present).

Court of Common Pleas

(513) 946-5800


Municipal Court

(513) 946-5700


Probate Court

William Howard Taft Center
230 E. Ninth St.
Cincinnati, Ohio 45202

Hours and Location

Many records are now available online.  Archival Records: Estates 1791 - 1984; Wills 1791 - 1973 (index); Trusts1791 - 1984; Guardianships 1791 - 1984: Marriages 1808 - 1983; Minister's License 1963 - 1975; Birth Records 1863 - 1908; Birth Registrations and Corrections 1941 - 1994; Death Records 1881 - 1908; Naturalizations 1856 - 1906; Probate Court Journal Entries 1791 - 1837; Physician Certificates 1919 - 1987.  Records are incomplete due to courthouse fires. 

First District Court of Appeals

William Howard Taft Center
230 E. Ninth St.
Cincinnati, Ohio 45202

(513) 946-3500


Federal Courts in Hamilton County

U.S. District Court, Southern District of Ohio
Office of the Clerk
Potter Stewart U.S. Courthouse, Room 103
100 East Fifth Street
Cincinnati, Ohio  45202

Directions and Hours 

District Court for Adams, Brown, Butler, Clermont, Clinton, Highland, Lawrence, Scioto and Warren counties in Ohio.

U.S. Court of Appeals for the Sixth Circuit
Potter Stewart U.S. Courthouse
100 East Fifth St.
Cincinnati, Ohio 45202

U.S. Courts Library

(513) 564-7321[1]



County Recorder and Auditor

Hamilton County Administration Building
138 E. Court St.
Cincinnati, Ohio 45202-1236

Recorder's Office

(513) 946-4573

Land records 1794-present, maps, Veteran's Grave Registrations. "Easy Reference List of Documents Recorded in the Recorder's Office" gives a complete list available records.

Auditor's Office

(513) 946-4000

Plats 1939-present. Property search is available on their website by name or address.

County Health Department

Hamilton County Public Health Department
250 William Howard Taft, 2nd Floor
Cincinnati, Ohio 45219
(513) 946-7800
Directions, Genealogical Research

Hamilton County births 1875-present, deaths 1891-present, Reading Health Department records.

Historical Facts


The county was named for the first Secretary of the Treasury, Alexander Hamilton. It's county seat is Cincinnati and was founded January 2, 1790. It is located in the South-western area of the state.[5]

Parent Jurisdictions

Hamilton County was created 2 Jan 1790 as an original county in the Northwest Territory.[6] In 1803, Ohio became a state with Hamilton County as one of the original counties.

County seat: Cincinnati [7]


Populated Places

A Gazetteer of Hamilton Co., Ohio 1784-1986 can be found in Guide to Genealogical Resources in Cincinnati & Hamilton Co., Ohio, 6th Edition.[8]  [Hereafter referred to as The Guide.]

Board on Geographic Names (BGN) can be searched for the names of populated places in Hamilton County. Search for Hamilton County, Ohio with 'Populated Places' selected as the "Feature Class."


Anderson, Cincinnati, Colerain, Columbia, Crosby, Delhi, Green, Harrison, Miami, Millcreek (defunct), Spencer, Springfield, Storrs (defunct), Sycamore, Symmes, Whitewater [9]

Neighboring Counties

Boone County, Kentucky  • Butler County, Ohio  • Campbell County, Kentucky  • Clermont County, Ohio  • Dearborn County, Indiana  • Kenton County, Kentucky  • Warren County, Ohio

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Family History Library

Addyston, Anderson Twp, Bevis, Bridgetown, Camp Dennison, Carthage, Cincinnati, Colerain Township, College Hill, Columbia Township, Crosby Township, Cumminsville, Delhi Township, Elmwood Place, Fairfield, Fernbank, Glendale, Green Township, Harrison, Lockland, Madisonville, Miami Heights, Monfort Heights, Montgomery, New Haven, North Bend, Norwood, Reading, Sayler Park, Springdale, Springfield Township, St. Bernard, Sycamore Township, The Village of Indian Hill, White Oak, Whitewater.  More may now be available.  If the community you are interested is not yet listed here, check the FamilySearch Catalog.

FamilySearch Wiki/Online


Terrace Park, Ohio Building Survey contains history of every building in the village with stories, photos, census and a deed index. The site also includes genealogy records for former residents.


For all Resources, please follow the link above. Specific topics:

Getting Started

Research Guides

Bible Records.


Tombstone Transcriptions Online Tombstone Transcriptions in Print List of Cemeteries in the county
Findagrave.com Family History Library Findagrave.com
GenWeb Tombston Photo WorldCat Billion Graves
OHTombstone Project OHGenWeb Cemeteries
Billion Graves
See Ohio Cemeteries for more information.


Church Records

Court Records


Searchable city directories for Hamilton County and surrounding areas are available through the Public Library of Cincinnati and Hamilton County.

Ethnic, Political, or Religious Groups

Dabne, Wendell Phillips. Cincinnati's Colored Citizens: Historical Sociological and Biographical - Cincinnati, Ohio: Dabney Pub. Co., C 1926 FHL 977.178 F2d


Local histories are available for Hamilton County, Ohio Genealogy. County histories may include biographies, church, school and government history, and military information. For more information about local histories, see the wiki page section Ohio Local Histories.

Local histories are available for Hamilton County, Ohio Genealogy. County histories may include biographies, church, school and government history, and military information. For more information about local histories, see the wiki page section Ohio Local Histories.


Local histories are available for Hamilton County, Ohio Genealogy. County histories may include biographies, church, school and government history, and military information. For more information about local histories, see the wiki page section Ohio Local Histories.

Land and Property

Land and property records can place an ancestor in a particular location, provide economic information, and reveal family relationships. Land records include: deeds, abstracts and indexes, mortgages, leases, grants and land patents.

See Ohio Land and Property for additional information about early Ohio land grants. After land was transferred to private ownership, subsequent transactions were usually recorded at the county courthouse and where records are currently housed.


Franklin CountyDearborn CountyBoone CountyKenton CountyCampbell CountyButler CountyWarren CountyClermont CountyOH HAMILTON.PNG
About this image
Click a neighboring county
for more resources



Civil War

  • Civil War service men from Hamilton County served in various regiments. Men often joined a company (within a regiment) that originated in their county. Listed below are companies that were specifically formed in Hamilton County.
- 11th Regiment, Ohio Infantry, Company K (Union Rifles)

World War II

Naturalization and Citizenship

Naturalization and Citizenship



Probate Records

Probate records created after 1852 are held by the Hamilton County, Ohio Genealogy Probate Court. From 1797 or the creation of the county, probate records were held by the Court of Common Pleas. Most counties transferred all records to the Probate Court, but in some circumstances, Court of Common Pleas records should be searched for records prior to 1852. Most records are housed at the Hamilton County, Ohio Genealogy Courthouse. Some records are on microfilm at the Ohio Genealogical Society and the Family History Library. For more complete information about the location of county probate records see:

See the wiki page Ohio Probate Records for information about how to use probate records.

Content: Probate Records may give the decedent's date of death, names of his or her spouse, children, parents, siblings, in-laws, neighbors, associates, relatives, and their place of residence.

Record types: Wills, estates, guardianships, naturalizations, marriage, adoption, and birth and death records (1867-1908 only).

Online Probate Records


Vital Records

Vital records consist of birth, death, marriage and divorce records. Although Ohio enacted a statute in 1856 -1857 requiring registration of births, deaths and marriages, many counties did not comply. A second law was written in 1867 but, again, was not always followed. By 1908, the law was more clearly defined and kept. Any existing birth and death records from 1867 through December 19, 1908 are located at the Hamilton County, Ohio Genealogy Probate Court. The Ohio Department of Health has birth records filed after December 20, 1908 and death records filed after January 1, 1954 while the Ohio Historical Society houses death records from December 20, 1908 through December 31, 1953.

Original marriage records are held at the office of the Hamilton County, Ohio Genealogy Probate Court with divorce records located with the Hamilton County, Ohio Genealogy Clerk of Courts.

See also How to order Ohio Vital Records or order vital records electronically online.






Family History Centers

Family history centers provide one-on-one assistance and free access to premium genealogical websites. In addition, many centers have free how-to genealogy classes. See family history center for more information. Search the online FHC directory for a nearby family history center.


Public Library of Cincinnati and Hamilton County

800 Vine Street
Cincinnati, Ohio
(513) 369-6900

PLCH is one of the largest genealogical libraries in the country. Very extensive Hamilton County history, genealogy and manuscript sources including a personal name card index to many local histories and manuscript materials.Online resources include: Catalog, Virtual Library, Newsdex.

Cincinnati History Library and Archives

1301 Western Avenue
Cincinnati, Ohio 45203
(513) 287-7030

Large collection of manuscript and microfilm materials including deeds, photographs, directories, census, local histories and military rosters. They have a vital record card index to some of their newspaper and manuscript materials (incomplete coverage). Online resources include: Name Index to Local Histories, Digital Journals, Catalog (incomplete)and Archive and Manuscript Registers (incomplete).

University of Cincinnati Archives & Rare Books Library

8th Floor Blegen Library
P.O. Box 210113
2602 McMicken Circle
Cincinnati, Ohio 45221-0113
(513) 556-1959
Location and Hours

The University of Cincinnati is the Ohio Network Of American History Research Center for Hamilton County. They are the designated repository for government records of Adams, Brown, Butler, Clermont, Clinton, Hamilton, Highland and Warren Counties in Ohio. The UC Archives has numerous records including the following online indexes: Hamilton County Ohio Citizenship Records 1837-1916, Hamilton County Ohio Wills 1791-1901 and Deaths 1865-1912 (image and index, in progress).


Hamilton County Chapter, Ohio Genealogical Society

Hamilton County Chapter, Ohio Genealogical Society Blog

P. O. Box 15865
Cincinnati, OH 45215-0865
(513) 956-7078

Cincinnati Newspaper Death Notice and Hamilton County Marriage Indexes are available on their website. HCGS has numerous publications including the "The Tracer" (journal) and "The Gazette" (newsletter).HCGS sponsors or co-sponsors numerous genealogical events.

Online Genealogy Research Groups


Upcoming Events

Hamilton County Genealogical Society events can be found on the website:

Calendar of Events

Sources Consulted

The following sources were consulted in creating the Hamilton County, Ohio Wiki and its subpages:

The Handybook of Genealogists: United States of America, 10th ed. Draper, Utah: Everton Pub., 2002.

Archives and Rare Books Department, University of Cincinnati. Inventory of Government Documents for Eight Counties of Southwest Ohio, Revised Edition. Cincinnati: University of Cincinnati, 1993.

Bell, Carol Willsey. Ohio Guide to Genealogical Sources. [Baltimore]: Genealogical Pub. Co., Inc., 1988.

Cyprych, Deb. "Hamilton County, Ohio, Probate Court Records: Online at Last!." The Tracer 31 (February 2010): 1, 6-9.

Cyprych, Deb. "Hamilton County, Ohio, Vital Records." The Tracer 27 (March 2006): 1, 9-15.

Dempsey, Jim. "TRACER, Article Index, 1979-2008." County Genealogical Society accessed 26 February 2011.

Graver, Bill and Deb Cyprych. "Cincinnati and Hamilton County Directories," The Tracer 27 (September 2006): 65, 71-74.

Graver, William H. Hamilton County, Ohio Guide to Recorder's Indexes and Documents 1794-1988. Milford, Ohio: Little Miami Pub. Co., 2003.

Ohio. Supreme court. Ohio Supreme Court Reports of Cases Argued and Decided in the Supreme Court of Ohio, Vol. 1, 1852-1853. Columbus: Osgood and Blake, 1853.

Sperry, Kim. Genealogical Research in Ohio, 2nd Edition. [Baltimore]: Genealogical Pub. Co., Inc., 2003.

Stratton, Liz. "Probate Court Records Update - Indexes to Vital Records." The Tracer 31 (November 2010): 102.

Terheiden, Connie Stunkel and Kenny R. Burck. Guide to Genealogical Resources in Cincinnati; Hamilton Co., Ohio, 6th Edition. Milford: Little Miami Pub. Co., 2009.

Wikipedia."Northwest Territory." Wikipedia. accessed 26 February 2011.


  1. Deb Cyprych, "Hamilton County, Ohio Vital Records," The Tracer 27 (Mar 2006): 8.
  2. William H. Graver, Hamilton County, Ohio Guide to Recorder's Indexes and Documents 1794-1988," (Milford, Ohio: Little Miami Pub. Co., 2003), 68.
  3. Carol Willsey Bell, Ohio Guide to Genealogical Sources ([Baltimore]: Genealogical Pub. Co., Inc., 1988).
  4. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Hamilton County, Ohio. Page 542 At various libraries (WorldCat); FHL Book 973 D27e 2002.
  5. Genealogy Trails History Group, “Hamilton County, Ohio Genealogy and History”, http://genealogytrails.com/ohio/hamilton/ accessed 2/17/2017.
  6. http://en.wikipedia.org/wiki/Northwest_Territory last updated 3 February 2011
  7. The Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002).
  8. Connie Stunkel Terheiden and Kenny R. Burck, Guide to Genealogical Resources in Cincinnati; Hamilton Co., Ohio, 6th Edition(Milford: Little Miami Pub. Co., 2009).
  9. William H. Graver, Hamilton County, Ohio Guide to Recorder's Indexes and Documents 1794-1988(Milford: Little Miami Pub. Co., 2003).
  10. Carol Willsey Bell, Ohio Wills and Estates to 1850: An Index (Columbus, Ohio: the author, 1981). FamilySearch Books Online - Free online copy.