Territory Northwest of the River Ohio (territory) -- Hamilton (county)


County Quick Reference

County Seat: Cincinnati

County Name: Named for Alexander Hamilton, first Secretary of the Treasury

Boundary Changes
(click on the name of a change to see more information)
04 JAN 17901,358The county was created from unorganized land
11 FEB 179231,23929,881 square miles was gained from Washington County and non-organized land
15 AUG 17968,83322,406 square miles was lost in the creation of Wayne County
10 JUL 17974,0734,760 square miles was lost in the creation of Adams County
22 JUN 17987,5063,433 square miles was gained from Knox County
20 AUG 17986,730776 square miles was lost to creation of Ross County
01 SEP 17986,592138 square miles was lost to Adams County
06 DEC 18005,788804 square miles was lost to the creation of Clermont County



(click on a title below to view laws involved in the formation or governance of the area)
(general information on the county to put it in the context of history)

Hamilton County was formed on 04 January 1790 by proclamation of the Governor of the Territory Northwest of the River Ohio [click here for more information]. By 1800, the county would go through seven changes to its boundaries before being incorporated into the State of Ohio. Click on a date in the table above to see a map of how the county looked on that date, as well as, the authority changing the boundary (if available).

The following map shows the original size of the county at its founding (in blue with a red border) and the final borders of the county after the boundary changes (in red with yellow border) superimposed on a modern map


Hamilton County in 1790 and 1800

(click on a year below to view information on the population of the Territory)


(click on the title of the following works to learn more about life in the area;for those items not available online, check with your local library for availability)

  • Index, History of Cincinnati and Hamilton County, Ohio Their Past and Present. S.l.: s.n.
  • Catholic Churches of Cincinnati and Hamilton County, Ohio Souvenir Album of American Cities. Cincinnati: Pub. by United States Church Album Pub. Co., 1896.
  • Sesquicentennial Celebration : Official Souvenir Historical Program, Hamilton-Butler County, October, 5-11, 1941, Hamilton, Ohio. Middletown, Ohio: Naegele-Auer Print. Co., 1941.
  • A History of the Cleves Presbyterian Church ;and, a History of the Presbyterian Church of Elizabeth and Berea. Ohio?: s.n., 1980.
  • Newtown, Ohio, 200th Anniversary : Bicentennial Edition, 1792-1992. Cincinnati, Ohio?: The Historical Committee, 1992.
  • St. Frances Cabrini Church : Colerain, Ohio. Galion, Ohio: United Church Directories, 1994.
  • A Chronicle of the League of Women Voters of the Cincinnati Area, 1920-1995. Cincinnati, Ohio: League of Women Voters Cincinnati Area, 1995.
  • Civil War Veterans That Died During the War. S.l.: s.n., 2001.
  • Green Township, Ohio, Est. 1809. Green Township, Ohio: Green Township, 2008. http://www.greentwp.org/.
  • Ames Printing and Publishing Co. Annual Medical Directory Embracing a Full List of Physicians, Dentists, Druggists and Trained Nurses of Cincinnati and Vicinity, and Covington, Newport, Dayton, Bellevue, and Ludlow, Kentucky. microformMicrofiche. Cincinnati, Ohio: Ames Print. and Pub. Co., 1919.
  • Bailey, Pamela and Glendale Heritage Preservation. Village of Glendale, 1855-2005. Glendale, Ohio: Glendale Heritage Preservation, 2004.
  • Becker, Frederick and Ruth A. Becker. A Todd Family History and Genealogy, 1749-1987 : Todds of Somerset County, New Jersey, and Hamilton County, Ohio--Principally the Ancestors and Descendants of John and Ann Phoenix Todd. Decorah, Iowa (Box 230, Decorah 52101): Anundsen Pub., 1987.
  • Bilkasley, Eddie. Fire Departments in Hamilton County Ohio : A History and Collection of Photographs. Cincinnati, OH: Eddie Bilkasley, 2009.
  • Boyer, India. The Baptist Churches Mt. Washington & Clough Neighborhood Studies Project of the Cincinnati Historical Society. Cincinnati, Ohio: Neighborhood Studies Project of the Cincinnati Historical Society, 1979.
  • Brien, Lindsay M. and Henry A. Ford. Abstracts from History of Hamilton County, Ohio. Fort Wayne: Fort Wayne & Allen County Library, 1966.
  • Brown, Mary Ann, James R. Lowry, Miami Purchase Association for Historic Preservation., Hamilton County (Ohio) and Hamilton County (Ohio). Board of County Commissioners. Historic Inventory of Hamilton County, Ohio : "An Historic Survey of 42 Suburban Communities". [12 vols. Cincinnati, Ohio?: Hamilton County Board of County Commissioners, 1991.
  • Burck, Kenny R., Debra Kay Cyprych and Ohio Genealogical Society. Hamilton County Chapter. German Interest Group. Der Deutsche Pionier-Verein Von Cincinnati : Information on the Membership from Articles in the Tracer, Published by the Hamilton County Genealogical Society. Cincinnati, Ohio: German Interest Group Hamilton County Chapter of Ohio Genealogical Society, 2002.
  • Burgheim, Max. Cincinnati in Wort Und Bild : Nach Authentischen Quellen Bearbeitet Und Zusammengestellt. Cincinnati: M. & R. Burgheim, 1888.
  • Burress, Marjorie Byrnside. The Brierlys of Pleasant Ridge : A Story of Early Life in Green Township. Ohio?: Marjorie Burress, 2009.
  • Burress, Marjorie Byrnside and Three Rivers Historical Society (Hamilton county Ohio). Dates of Interest to Miami Township : A Chronological History of the Community. S.l.: Three Rivers Historical Society, 1987.
  • Camp Washington Methodist Episcopal Church (Cincinnati Ohio), Spring Grove Methodist Episcopal Church (Cincinnati Ohio), Methodist Episcopal Church. West Chester Circuit (Cincinnati Ohio), Methodist Episcopal Church. Miami Circuit (Hamilton County Ohio) and Montgomery and Bethel Methodist Episcopal Church (Hamilton County Ohio). Camp Washington Church Record. microform . Salt Lake City, Utah: Genealogical Society of Utah Ohio Pioneer Project, 1987.
  • Cary, S. F. History of College Hill and Vicinity : With a Sketch of Pioneer Life in This Part of Ohio. College Hill, Ohio: s.n., 1886.
  • Cary, S. F. Record of Revolutionary Soldiers Buried in Hamilton Co., Ohio. Cincinnati,, 1895.
  • Christ Church (Glendale Ohio). The Seventy-Fifth Anniversary of the Founding of Christ Church, Glendale, O. Glendale, Ohio: The Church, 1940.
  • Colerain Elementary School (Cincinnati Ohio) and Greater Cincinnati Center for Economic Education. Colerain History. Cincinnati: Greater Cincinnati Center for Economic Education, 1990.
  • Colerain Township Bicentennial Committee Inc. Our Heritage : Colerain Township. Cincinnati, Ohio: The Committee, 1976.
  • Craig, Robert D. Revolutionary Soldiers in Hamilton County, Ohio. Salt Lake City, Utah: The Author, 1965.
  • Craig, Robert D. and Historical and Philosophical Society of Ohio. Hamilton County, Ohio Cemeteries Names and Locations. microformMicrofiche. Cincinnati, Ohio: s.n., 1963.
  • Critchell, Virginia C., Carol Flum, Maxine Van Aken and Greater Milford Area Historical Society. Bridge to the Past : A History of Milford, Ohio. Milford, Ohio: Greater Milford Area Historical Society, 2001.
  • Crosby Township Historical Society (Ohio). A Crosby Township History. Harrison, Ohio: Crosby Township Historical Society, 2003.
  • Cummins, Virginia Raymond. Hamilton County, Ohio : Court and Other Records. Cincinnati, Ohio: General Print. Co., 1966.
  • Daughters of the American Revolution. Cincinnati Chapter. 1988 Bicentennial Committee. Soldiers of the American Revolution 1775-1783 : Buried in Hamilton County Ohio. Cincinnati, Ohio?: s.n., 1987.
  • Daughters of the American Revolution. Cincinnati Chapter. Marriage Records, Hamilton County, Ohio. microform .Microfiche. Cincinnati, Ohio: Cincinnati Chapter D.A.R., 1941.
  • Daughters of the American Revolution. Cincinnati Chapter. Bible and Family Records, Cemetery Inscriptions ;Family History Early Vital Records of Ohio / Daughters of the American Revolution. Cincinnati, Ohio: The Chapter, 1972.
  • Daughters of the American Revolution. Cincinnati Chapter. Historic Sites Committee. Revolutionary War Soldiers Buried in Hamilton County, Ohio. Milford, Ohio: Little Miami Pub. Co., 2010.
  • Dickoré, Marie. Census for Cincinnati, Ohio, 1817;and Hamilton County, Ohio, voters' lists, 1798-1799. Cincinnati, 1960.
  • Dickoré, Marie and Natalie Thornburgh. Hamilton County, Ohio, marriage records, 1808-1820, and wills (abstracts) 1790-1810. Cincinnati : Ohio, 1959.
  • Duba, Larry and Sue Schuler Brunsman. The History of Delhi Township. Cincinnati?: Delhi Historical Society, 1994.
  • Engelken, Virginia. The Ward Family : Joseph Ward, 1734-1824 : Revolutionary Soldier and Pioneer Settler of Madisonville (Hamilton County), Ohio. Cincinnati, Ohio: V. Engelken, 1989.
  • Everhard, Lloyd R. St. Timothy's Episcopal Church 1956 to 1980 Neighborhood Studies Project of the Cincinnati Historical Society. Cincinnati, Ohio: Neighborhood Studies Project of the Cincinnati Historical Society, 1980.
  • Faran, Angeline Loveland. Glendale, Ohio, 1855-1955. Cincinnati,: McDonald Print. Co., 1955.
  • Farris, John. "Henry Clay's American System and the Emergence of the National Republican Party in Hamilton County, Ohio, 1816-1836." M.a., Miami University, 1984.
  • Fisbeck, Edw G. A Brief History of Lockland, Wyoming, Reading. Lockland, Ohio: Hussey Pub. and Advertising, 1897.
  • Flickinger, Joe. A Bicentennial History of Green Township : Uncovering a Jewel in the Crown of the Queen City 1809-2009. Westminster, Md.: Heritage Books, 2011.
  • Ford, Henry A. History of Hamilton County, Ohio, Index. S.l.: s.n., 1974.
  • Ford, Henry Allen and Kate B. Ford. History of Hamilton County, Ohio : With Illustrations and Biographical Sketches ;Compiled by Henry A. Ford, A.M., and Mrs. Kate B. Ford. Cleveland: L.A. Williams & co., 1881.
  • Ford, Kate B. Index, History of Hamilton County, Ohio, with Illustrations and Biographical Sketches. United States: s.n., 1975.
  • Garard and Martin Descendents Association. and Greater Anderson Township Bicentennial Commission (Hamilton County Ohio). The Garard and Martin Station : Founded December 23, 1790. Cincinnati, Ohio: Greater Anderson Township Bicentennial Commission, 1993.
  • Glendale Heritage Preservation. Glendale's Heritage, Glendale, Ohio. 1st ed. Glendale? Ohio: Glendale Heritage Preservation, 1976.
  • Green, James Albert. The Map of Hamilton County. Columbus, Ohio: F.J. Heer, 1926.
  • Greene County Home Coming Association (Greene County Ohio) and Public Library of Cincinnati and Hamilton County. Virtual Library. Greene County, 1803-1908. Xenia, Ohio: Aldine Pub. House, 1908. http://virtuallibrary.cincinnatilibrary.org/virtuallibrary/vl_oldrare.aspx?resid=1575.
  • Hale, Harry L. Kuliga, the Pretty Land : The Colorful Story of Green Township. Hamilton County, Ohio. S.l.: Western Hills Press, 1949.
  • Hamilton County (Ohio). Recorder's Office. "Hamilton County Deed Books, 1787-1852, 1894-1895." 53.
  • Historical Committee (Newtown Hamilton County Ohio). Newtown, Ohio, 175th Anniversary : September 21, 22, 23, 24, 1792-19167. Newtown, Ohio?: s.n., 1967.
  • Historical Records Survey (Ohio). Inventory of the County Archives of Ohio. No. 31. Hamilton County (Cincinnati). Columbus, Ohio: The Survey, 1937.
  • Horwitz, Lester V. "Morgan's Raid Time Line : Through Cincinnati Suburbs in Hamilton & Clermont Counties, July 13-14, 1863." Cincinnnati: L. Horwitz, 1995.
  • Hover, John C. Memoirs of the Miami Valley. 3 vols. [Hamilton County ed. Chicago: Robert O. Law Co., 1919.
  • Howe, Henry, Barbara Keyser Gargiulo and Henry Howe. Hamilton County, Ohio : As Extracted from Henry Howe's Historical Collections of Ohio. Milford, Ohio: Little Miami Pub. Co., 2005.
  • Howe, Henry and Henry Howe. History of Hamilton County, Ohio, 1790-1889. Knightstown, IN: The Bookmark, 1979.
  • Hutchison, W. A. Historical Discourse of the Reading and Lockland Presbyterian Church : Hamilton Co., Ohio. Cincinnati: Elm Street Print. Co., 1876.
  • Jungclas, Daniel Thomas. Cincinnati & Hamilton County, Ohio Genealogy. Cincinnati, Ohio?: Daniel Thomas Jungclas. http://www.jungclas.com/gensite/hamilton/.
  • Kaiser, Ramona. Glimpses into the Past;Tales of People, Settlements and Events within Columbia, Symnes and Sycamore Townships, Hamilton County, O. Madeira, O.,: Madeira Press, 1940.
  • Kendall, Reese P. Pioneer Annals of Greene Township in Hamilton County, Ohio. San Jose, Calif.: Geo. F. Degelman printer, 1905.
  • Leonard, Lewis Alexander and Will L. Clark. Greater Cincinnati and Its People a History. microformMicrofiche. New York: Lewis Historical Pub. Co., 1927.
  • Lewis, Margaret. A Path. Lockland, Ohio?: s.n., 1973.
  • Lowery, Roland. Township Tales : Some Peeks into the Past of People and Places in Anderson Township, Hamilton County, Ohio. Cincinnati, Ohio: R. Lowery, 1985.
  • Lowery, Roland. Anderson Township Tales. 2nd ed. S.l.: s.n., 1988.
  • Lowery, Roland. Anderson Township Historical Society, Hamilton County, Ohio : The First 25 Years. Cincinnati: R. Lowery?, 1992.
  • Lueders, Jeffrey R. Hamilton County's Green Township Images of America. Charleston, SC: Arcadia Pub., 2006.
  • McBride, James. Notes on Hamilton, 1831.
  • McClure, Stanley W. and Crosby Township Historical Society (Ohio). The History of Crosby Township, Hamilton County, Ohio. Special memorial ed. Harrison, Ohio: Crosby Township Historical Society, 2004.
  • McConville, G. Terrence and Fred L. Rutherford. Pioneers of the Lower Little Miami Valley. Mariemont, Ohio: Mariemont Preservation Foundation, 2005.
  • Miami Purchase Association for Historic Preservation. "Historic Hamilton County, Ohio." Cincinnati: The Association, 1987.
  • Morrow, Josiah. History of the Sycamore Associate Reformed Church, Now United Presbyterian Publications of the Historical and Philosophical Society of Ohio, 1930. Cincinnati?, 1930.
  • Mt. Washington Methodist Church (Cincinnati Ohio). 1851-1951 : A Century of Service : Centennial Celebration : April 25-29, 1951. Cincinnati: The Church, 1951.
  • Ohio Genealogical Society. Hamilton County Chapter. Abstract of Book 1 & Book a, Probate Record 1791-1826, Hamilton County, Ohio. microform .Microfiche. Cincinnati, Ohio: Hamilton County Chapter Ohio Genealogical Society, 1977.
  • Ohio Genealogical Society. Hamilton County Chapter. "The Tracer." v. Cincinnati, OH: The Chapter, 1979.
  • Ohio Genealogical Society. Hamilton County Chapter. "A Bicentennial Tribute Honoring Our First Settlers" : October 8, 1988, Hamilton County, Ohio. Cincinnati, Ohio: The Chapter, 1988.
  • Olden, J. G. Historical Sketches and Early Reminiscences of Hamilton County, Ohio : Including a Brief History of the Early Churches and of the Settlement of the Millcreek Valley. Cincinnati, Ohio: H. Watkins printer, 1890.
  • Rakel, Michael R. The History of Reading, Ohio : An American History. Reading, Ohio?: M.R. Rakel, 1992.
  • Reading and Lockland Presbyterian Church (Lockland Ohio). 125th Anniversary : 1823-1948. S.l.: Morrow Printing, 1948.
  • Reading Historical Society (Reading Ohio). History of Reading, Ohio : Founded 1794, Incorporated 1851, City Status 1931. 1st ed. Reading, Ohio: Don Lindeman Graphic Information Systems for the Reading Historical Society, 1994.
  • Reading Historical Society (Reading Ohio). Sesquicentennial Historical Souvenir Celebrating 150 Years City of Reading, Ohio. Reading, Ohio: Reading Historical Society, 2001.
  • Reading Historical Society (Reading Ohio). Sesquicentennial Committee. Reading, Ohio Sesquicentennial : 1851-2001. Reading, Ohio: Reading Historical Society, 2001.
  • Reemelin, Charles and Green Township harvest home association. Historical Sketch of Greene [Sic] Township, Hamilton County, Ohio. Cincinnati: R. Clarke & Co., 1882.
  • Ryan, Kay M., Kenny R. Burck and Ohio Genealogical Society. Hamilton County Chapter. Index to Hamilton County, Ohio Special Census : 1890 Union Veterans & Widows of the Civil War. Milford, Ohio: Little Miami Pub. Co., 2006.
  • S. B. Nelson & Co. History of Cincinnati and Hamilton County, Ohio, Their Past and Present Including Early Settlement and Development;Antiquarian Researches;Their Aboriginal History;Pioneer History;Political Organization;Agricultural, Mining and Manufacturing Interests;a History of the City, Villages and Townships;Religious, Educational, Social, Military and Political History;Statistics;Biographies and Portraits of Pioneers and Representative Citizens, Etc. Cincinnati, Ohio: S.B. Nelson & Co., 1894.
  • Sakmyster, Thomas L. and James Innis. Old Asbury : A History of Asbury Methodist Chapel (Green Township, Hamilton County, Ohio). Cincinnati, Ohio: Porter Print. Co., 1984.
  • Scholle, Francis H. and Don Linz. Colerain Township Images of America. Charleston, SC: Arcadia Pub., 2010.
  • Smalley, Stephen B. Mccormick Settlement, Salem Village;Six Hundred and Twenty-Six Acres in Anderson Township, Hamilton County, Ohio, Settled by Francis Mccormick, the Virginia Soldier Who Introduced Methodism into the Northwest Territory in 1797. Cincinnati,: Printed by Mt. Washington Press, 1967.
  • Smith, Alma A. The Virginia Military Surveys of Clermont and Hamilton Counties, Ohio, 1787-1849. Cincinnati, Ohio: A.A. Smith, 1985.
  • Smith, Carolyn F. Lincoln Heights Images of America. Charleston, SC: Arcadia Pub., 2009.
  • Springfield Township Bicentennial Committee. Bicentennial History of Springfield Township. Cincinnati, Ohio: The Committee, 1976.
  • St. John's Evangelical Church of Delhi and Green Townships (Hamilton County Ohio). Ninetieth Anniversary Jubilee : St. John's Evangelical Protestant Church of Delhi and Green Townships : April 28-May 5, 1940. Cincinnati: s.n., 1940.
  • Steele, Elizabeth and Patricia Kuderer. A History of the Village of Fairfax. Fairfax, Ohio?: The Village?, 1976.
  • Swisher, Paul Edward. "Immigrant Groups in Hamilton County before 1850." M.a., Ohio State University, 1946.
  • Teetor, Henry Benton. The Past and Present of Mill Creek Valley : Being a Collection of Historical and Descriptive Sketches of That Part of Hamilton County, Ohio. Containing Facts, Incidents, and Anecdotes Illustrating the Toils and Privations, as Well as the Manners and Customs, of the Early Settlers. Cincinnati: Cohen & Co., 1882.
  • The Public Library of, Cincinnati and Staff Hamilton County. History Department/Map Collection. Greater Cincinnati Genealogical Resources, a Guide to Some of the Libraries, Archives, Societies, Etc. In the Metropolitan Counties, 1991.
  • Unger, Allen L. "Zion Church and Its Change from Rural to Rural Urban." B.d., Bonebrake Theological Seminary, 1954.
  • Wells, Ruth J. Colerain Township "Revisited" : 1794-1994 Bicentennial Year. Cincinnati, OH: R.J. Wells, 1994.
  • Young, Katherine and First Baptist Church of Newtown (Newtown Hamilton County Ohio). Sesquicentennial History Committee. A History of the First Baptist Church of Newtown (1841-1991). 1st ed. Newtown, Ohio (6944 Main St., Newtown 45244): The Church, 1991.


Referenced Items
(content on HistoryKat that references this area)

Alteration in the Boundary of Hamilton, Wayne, and Knox, 1798

The Western boundary of the County of Hamilton shall begin at the spot on the bank of the Ohio River where the general boundary line between the lands of the United States and the Indian Tribes, established at Greeneville on the third day of August 1795 so intersects the bank of that River & run with that general boundary line to Fort Recovery;and from thence by a line to be drawn due north from Fort Recovery until it intersects the Southern boundary line of the County of Wayne, and the said line from the Ohio to Fort Recovery and from thence to the southern boundary of the County of Wayne shall also be the eastern boundary of the County of Knox

Wayne County Proclamation, 1796

Beginning at the mouth of Cuyahoga river, upon lake Erie, and with the said river to the Portage, between it and the Tuscarawa branch of the Muskingum;thence down the said branch to the forks, at the carrying place above fort Lawrence;thence by a west line, to the eastern boundary of Hamilton county, (which is a due north line from the lower Shawnese town upon the Scioto river) thence by a line west-northerly to the southern part of the Portage

Formation of Hamilton County, 1790

On the 2d of January35 His Excellency arrived at Fort Washington in the Purchase of Judge Symmes & on the 4th was pleased to order & direct that the whole of the Lands lying & being within the following Boundaries Viz: Beginning on the Bank of the Ohio River at the Confluence of the little Miami & down the said Ohio River to the Mouth of the big Miami & up said Miami to the standing Stone Forks or Branch of said River & thence with a Line to be drawn due East to the little Miami & down said little Miami River to the Place of Beginning should be a County by the Name & Style of the County of Hamilton36 And the same was accordingly laid off agreeably to the Form, Pages 14th & 15th of this Vol

Alteration of the Boundaries of Hamilton County, 1792

Whereas by the Ordinance of Congress of the thirteenth of July one thousand seven hundred and eighty seven for the Government of the Territory of the United States North west of the River Ohio It is directed that for the due Execution of Process civil and criminal the Governour shall make proper Division of the said Territory and proceed from Time to Time as Circumstances may require to lay out the Parts of the same where the Indian Titles shall have been extinguished into Counties and Townships


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