Ohio Counties


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Note: If you would like to adopt a county or state, please go to About This Project for information on what is required for hosting a county or state.


COUNTY DATE CREATED ORIGIN COUNTY SEAT COORDINATOR
Adams 10 Jul 1797 Hamilton County West Union Adopt Me!
Allen 01 Mar 1820 Shelby County Lima Adopt Me!
Ashland 24 Feb 1846 Wayne, Richland, Huron, & Lorain Counties Ashland Adopt Me!
Ashtabula 07 Jun 1807 Trumbull & Geauga Counties Jefferson Adopt Me!
Athens
01 Mar 1805 Washington County Athens Adopt Me!
Auglaize
14 Feb 1848 Allen, Mercer, Darke, Hardin, Logan,
Shelby & Van Wert Counties
Wapakoneta Adopt Me!
Belmont 07 Sep 1801 Jefferson & Washington Counties St. Clairsville Adopt Me!
Brown 01 Mar 1818 Adams & Clermont Counties Georgetown Adopt Me!
Butler 01 May 1803 Hamilton County Hamilton Adopt Me!
Carroll    
01 Jan 1833 Columbiana, Stark, Harrison, Jefferson,
& Tuscarawas Counties
Carrollton Adopt Me!
Champaign 01 Mar 1805 Greene & Franklin Counties Urbana Adopt Me!
Clark 01 Mar 1818 Champaign, Madison, & Greene Counties Springfield Adopt Me!
Clermont 06 Dec 1800 Hamilton County Batavia Adopt Me!
Clinton 01 Mar 1810 Highland & Warren Counties Wilmington Adopt Me!
Columbiana 01 May 1803 Jefferson & Washington Counties Lisbon Adopt Me!
Coshocton 31 Jan 1810 Muskingum & Tuscarawas Counties Coshocton Adopt Me!
Crawford 01 Apr 1820 Delaware County Bucyrus Adopt Me!
Cuyahoga 07 Jun 1807 Geauga County Cleveland Adopt Me!
Darke 03 Jan 1809 Miami County Greenville Adopt Me!
Defiance 07 Apr 1845 Williams, Henry & Paulding Counties Defiance Adopt Me!
Delaware 01 Apr 1808 Franklin County Delaware Adopt Me!
Erie 15 Mar 1838 Huron & Sandusky Counties Sandusky Adopt Me!
Fairfield 09 Dec 1800 Ross & Washington Counties Lancaster Adopt Me!
Fayette 01 Mar 1810 Ross & Highland Counties Washington Courthouse Adopt Me!
Franklin 30 Apr 1803 Ross & Wayne Counties Columbus Adopt Me!
Fulton 01 Apr 1850 Lucas, Henry, & Williams Counties Wauseon Adopt Me!
Gallia 30 Apr 1803 Washington & Adams Counties Gallipolis Adopt Me!
Geauga 01 Mar 1806 Trumbull County Chardon Adopt Me!
Greene 01 May 1803 Hamilton & Ross Counties Xenia Adopt Me!
Guernsey 01 Mar 1810 Belmont & Muskingum Counties Cambridge Valerie McNutt
Hamilton 02 Jan 1790 One of the original counties Cincinnati Adopt Me!
Hancock 01 Apr 1820 Logan County Findlay
Hardin 01 Apr 1820 Logan County Kenton Adopt Me!
Harrison 01 Feb 1813 Jefferson & Tuscarawas Counties Cadiz Adopt Me!
Henry 01 Apr 1820 Shelby County Napoleon Adopt Me!
Highland
01 May 1805 Ross, Adams, & Clermont Counties Hillsboro Adopt Me!
Hocking 01 Mar 1818 Athens, Ross, & Fairfield Counties Logan Adopt Me!
Holmes 20 Jan 1824 Coshocton, Wayne, & Tuscarawas Counties Millersburg Adopt Me!
Huron 07 Mar 1809 Portage & Cuyahoga Counties Norwalk Adopt Me!
Jackson
01 Mar 1816 Scioto, Gallia, Athens, & Ross Counties Jackson Adopt Me!
Jefferson 29 Jul 1797 Washington County Steubenville Adopt Me!
Knox   01 Mar 1808 Fairfield County Mount Vernon Ohio State Team
Lake 06 Mar 1840 Geauga & Cuyahoga Counties Painsville Adopt Me!
Lawrence 21 Dec 1815 Gallia & Scioto Counties Ironton Adopt Me!
Licking 01 Mar 1808 Fairfield County Newark Adopt Me!
Logan 01 Mar 1818 Champaign County Bellefontaine Adopt Me!
Lorain 26 Dec 1822 Huron, Cuyahoga, & Medina Counties Elyria Adopt Me!
Lucas 20 Jun 1835 Wood, Sandusky, & Huron Counties Toledo Adopt Me!
Madison 01 Mar 1810 Franklin County London Adopt Me!
Mahoning 01 Mar 1846 Columbiana & Trumbull Counties Youngstown Adopt Me!
Marion 01 Apr 1820 Delaware County Marion Adopt Me!
Medina 18 Feb1812 Portage County Medina Adopt Me!
Meigs
01 Apr 1819 Gallia & Athens Counties Pomeroy Adopt Me!
Mercer   01 Apr 1820 Darke County Celina Ohio State Team
Miami 01 Mar 1807 Montgomery County Troy Adopt Me!
Monroe 29 Jan 1813 Belmont, Washington, & Guernsey Counties Woodsfield Adopt Me!
Montgomery
01 May 1803 Hamilton & Wayne Counties Dayton Adopt Me!
Morgan 29 Dec 1817 Washington, Guernsey, & Muskingum Counties McConnelsville Adopt Me!
Morrow 01 Mar 1848 Knox, Marion, Delaware, & Richland Counties Mount Gilead Adopt Me!
Muskingum 01 Mar 1803 Washington & Fairfield Counties Zanesville Valerie McNutt
Noble 01 Apr 1851 Monroe, Washington, Morgan, & Guernsey Counties Caldwell Adopt Me!
Ottawa 01 Mar 1803 Washington & Fairfield Counties Port Clinton Adopt Me!
Paulding 01 Apr 1820 Darke County Paulding Adopt Me!
Perry 01 Mar 1818 Washington, Fairfield, & Muskingum Counties New Lexington Adopt Me!
Pickaway 01 Mar 1810 Ross, Fairfield, & Franklin Counties Circleville Adopt Me!
Pike 01 Feb 1815 Ross, Scioto, & Adams Counties Waverly Adopt Me!
Portage 07 Jun 1807 Trumbull County Ravenna Adopt Me!
Preble 01 Mar 1808 Montgomery & Butler Counties Eaton Adopt Me!
Putman 01 Apr 1820 Shelby County Ottawa Adopt Me!
Richland 01 Mar 1808 Fairfield County Mansfield Adopt Me!
Ross 20 Aug 1798 Adams & Washington Counties Chillicothe Adopt Me!
Sandusky 01 Apr 1820 Huron County Fremont Adopt Me!
Scioto 01 May 1803 Adams County Portsmouth Adopt Me!
Seneca 01 Apr 1820 Huron County Tiffin Adopt Me!
Shelby 01 Apr 1819 Miami County Sidney Adopt Me!
Stark
13 Feb 1808 Columbiana County Canton Adopt Me!
Summit 03 Mar 1840 Medina, Portage, & Stark Counties Akron Adopt Me!
Trumbull Jul 10, 1800 Jefferson & Wayne Counties Warren Adopt Me!
Tuscarawas 15 Mar 1808 Muskingum County New Philadelphia Adopt Me!
Union 01 Apr 1820 Delaware, Franklin, Logan, & Madison Counties Marysville Adopt Me!
Van Wert
01 Apr 1820 Darke County Van Wert Adopt Me!
Vinton 23 Mar 1850 Athens, Gallia, Hocking, Jackson, & Ross Counties McArthur Adopt Me!
Warren 01 May 1803 Hamilton County Lebanon Adopt Me!
Washington 27 Jul 1788 One of the original counties Marietta Adopt Me!
Wayne
01 Mar 1808 From non-county area Wooster Adopt Me!
Williams 01 Apr 1820 Darke County Bryan Adopt Me!
Wood 01 Apr 1820 Refactored from non-county territory Bowling Green Adopt Me!
Wyandot 03 Feb 1845 Marion, Crawford, & Hardin Counties Upper Sandusky Adopt Me!

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