List of counties in Ohio

There are eighty-eight counties in the U.S. state of Ohio. The elected county officials include three commissioners, a sheriff (the highest law enforcement officer in the county); prosecutor (equivalent of a district attorney in other states); coroner, engineer, auditor, treasurer and clerk of courts.

Counties of Ohio

List of counties

County	FIPS Code	County Seat	Created	Origin	Meaning of name	Population (2020)	Area	Map
Adams County	001	West Union	Jul 10, 1797	Hamilton County	John Adams (1735–1826), President of the United States when the county was organized	27,477	583.91 sq mi (1,512 km2)
Allen County	003	Lima	Mar 1, 1820	Shelby County	John Allen (1771/2-1813), a War of 1812 colonel	102,206	404.43 sq mi (1,047 km2)
Ashland County	005	Ashland	Feb 24, 1846	Wayne, Richland, Huron, and Lorain Counties	Ashland, home of U.S. Senator from Kentucky Henry Clay	52,447	424.37 sq mi (1,099 km2)
Ashtabula County	007	Jefferson	Jun 7, 1807	Trumbull and Geauga Counties	Ashtabula River, which means "fish river" in an Algonquian language	97,574	702.44 sq mi (1,819 km2)
Athens County	009	Athens	Mar 1, 1805	Washington County	Athens in Greece	62,431	506.76 sq mi (1,313 km2)
Auglaize County	011	Wapakoneta	Feb 14, 1848	Allen, Mercer, Darke, Hardin, Logan, Shelby, and Van Wert Counties	Auglaize River, which means "fallen timbers river" in the Shawnee language	46,422	401.25 sq mi (1,039 km2)
Belmont County	013	St. Clairsville	Sep 7, 1801	Jefferson and Washington Counties	Belle monte, which means "beautiful mountain" in French	66,497	537.35 sq mi (1,392 km2)
Brown County	015	Georgetown	Mar 1, 1818	Adams and Clermont Counties	General Jacob Brown (1775–1828), an officer of the War of 1812	43,676	491.76 sq mi (1,274 km2)
Butler County	017	Hamilton	May 1, 1803	Hamilton County	General Richard Butler (1743–1791), killed at the Battle of the Wabash	390,357	467.27 sq mi (1,210 km2)
Carroll County	019	Carrollton	Jan 1, 1833	Columbiana, Stark, Harrison, Jefferson, and Tuscarawas Counties	Charles Carroll (1737–1832), last surviving signer of the United States Declaration of Independence	26,721	394.67 sq mi (1,022 km2)
Champaign County	021	Urbana	Mar 1, 1805	Greene and Franklin Counties	French for "a plain", describing the land in the area	38,714	428.56 sq mi (1,110 km2)
Clark County	023	Springfield	Mar 1, 1818	Champaign, Madison, and Greene Counties	General George Rogers Clark (1752–1818), defeated the Shawnee Indians in a battle near the Springfield area	136,001	399.86 sq mi (1,036 km2)
Clermont County	025	Batavia	Dec 6, 1800	Hamilton County	French for "clear mountain"	208,601	451.99 sq mi (1,171 km2)
Clinton County	027	Wilmington	Mar 1, 1810	Highland and Warren Counties	George Clinton (1739–1812), vice-president when the county was organized	42,018	410.88 sq mi (1,064 km2)
Columbiana County	029	Lisbon	May 1, 1803	Jefferson and Washington Counties	Christopher Columbus, European explorer of the Americas	101,877	532.46 sq mi (1,379 km2)
Coshocton County	031	Coshocton	Jan 31, 1810	Muskingum and Tuscarawas Counties	Delaware Indian word meaning "union of waters"	36,612	564.07 sq mi (1,461 km2)
Crawford County	033	Bucyrus	Apr 1, 1820	Delaware County	Colonel William Crawford (1732–1782), Revolutionary War officer	42,025	402.11 sq mi (1,041 km2)
Cuyahoga County	035	Cleveland	Jun 7, 1807	Geauga County	Cuyahoga River, which means "crooked river" in an Iroquoian language	1,264,817	458.49 sq mi (1,187 km2)
Darke County	037	Greenville	Jan 3, 1809	Miami County	General William Darke (1736–1801), Revolutionary War officer	51,881	599.80 sq mi (1,553 km2)
Defiance County	039	Defiance	Apr 7, 1845	Williams, Henry, and Paulding Counties	Fort Defiance, built in 1794 by General Anthony Wayne	38,286	411.16 sq mi (1,065 km2)
Delaware County	041	Delaware	Apr 1, 1808	Franklin County	Delaware Indians	214,124	442.41 sq mi (1,146 km2)
Erie County	043	Sandusky	Mar 15, 1838	Huron and Sandusky Counties	Erie Indians	75,622	254.88 sq mi (660 km2)
Fairfield County	045	Lancaster	Dec 9, 1800	Ross and Washington Counties	Named for the beauty of its "fair fields"	158,921	505.11 sq mi (1,308 km2)
Fayette County	047	Washington Court House	Mar 1, 1810	Ross and Highland Counties	Gilbert du Motier, marquis de La Fayette, French military officer and aristocrat who participated in both the American and French revolutions	28,951	406.58 sq mi (1,053 km2)
Franklin County	049	Columbus	Apr 30, 1803	Ross and Wayne Counties	Benjamin Franklin (1706–1791), Founding Father, author, printer, satirist, political theorist, scientist, inventor and statesman	1,323,807	539.87 sq mi (1,398 km2)
Fulton County	051	Wauseon	Apr 1, 1850	Lucas, Henry, and Williams Counties	Robert Fulton (1765–1815), inventor of the steamboat	42,713	406.78 sq mi (1,054 km2)
Gallia County	053	Gallipolis	Apr 30, 1803	Washington and Adams Counties	Gaul, the ancient name of France	29,220	468.78 sq mi (1,214 km2)
Geauga County	055	Chardon	Mar 1, 1806	Trumbull County	A Native American word meaning "raccoon"	95,397	403.66 sq mi (1,045 km2)
Greene County	057	Xenia	May 1, 1803	Hamilton and Ross Counties	General Nathanael Greene (1742–1786), Revolutionary War officer	167,966	414.88 sq mi (1,075 km2)
Guernsey County	059	Cambridge	Mar 1, 1810	Belmont and Muskingum Counties	Island of Guernsey, from where most of the settlers originated	38,438	521.90 sq mi (1,352 km2)
Hamilton County	061	Cincinnati	Jan 2, 1790	One of the original counties	Alexander Hamilton (1755/7-1804), Secretary of the Treasury when the county was organized	830,639	407.36 sq mi (1,055 km2)
Hancock County	063	Findlay	Apr 1, 1820	Logan County	John Hancock (1737–1793), president of the Continental Congress	74,920	531.35 sq mi (1,376 km2)
Hardin County	065	Kenton	Apr 1, 1820	Logan County	General John Hardin (1753–1792), Revolutionary War officer	30,696	470.29 sq mi (1,218 km2)
Harrison County	067	Cadiz	Feb 1, 1813	Jefferson and Tuscarawas Counties	General William Henry Harrison (1773–1841), an officer of the War of 1812 and future President of the United States	14,483	403.53 sq mi (1,045 km2)
Henry County	069	Napoleon	Apr 1, 1820	Shelby County	Patrick Henry (1736–1799), Revolutionary War-era legislator, orator, and scholar	27,662	416.50 sq mi (1,079 km2)
Highland County	071	Hillsboro	May 1, 1805	Ross, Adams, and Clermont Counties	Descriptive of the county's terrain	43,317	553.28 sq mi (1,433 km2)
Hocking County	073	Logan	Mar 1, 1818	Athens, Ross, and Fairfield Counties	Possibly derived from the Delaware Indian word "Hoch-Hoch-ing", meaning "bottle"	28,050	422.75 sq mi (1,095 km2)
Holmes County	075	Millersburg	Jan 20, 1824	Coshocton, Wayne, and Tuscarawas Counties	Major Andrew Holmes (died 1814), a War of 1812 officer	44,223	422.99 sq mi (1,096 km2)
Huron County	077	Norwalk	Mar 7, 1809	Portage and Cuyahoga Counties	Huron Indians	58,565	492.69 sq mi (1,276 km2)
Jackson County	079	Jackson	Mar 1, 1816	Scioto, Gallia, Athens, and Ross Counties	General Andrew Jackson (1767–1845), future President of the United States	32,653	420.28 sq mi (1,089 km2)
Jefferson County	081	Steubenville	Jul 29, 1797	Washington County	Thomas Jefferson (1743–1826), Vice President when the county was organized, future President of the United States, and principal author of the Declaration of Independence	65,249	409.61 sq mi (1,061 km2)
Knox County	083	Mount Vernon	Mar 1, 1808	Fairfield County	General Henry Knox, the first Secretary of War	62,721	527.12 sq mi (1,365 km2)
Lake County	085	Painesville	Mar 6, 1840	Geauga and Cuyahoga Counties	Its location on Lake Erie	232,603	228.21 sq mi (591 km2)
Lawrence County	087	Ironton	Dec 21, 1815	Gallia and Scioto Counties	Captain James Lawrence (1781–1813), naval hero in the War of 1812	58,240	454.96 sq mi (1,178 km2)
Licking County	089	Newark	Mar 1, 1808	Fairfield County	Licking River, named for the salt licks in the area, or an English pronunciation of the Lenape word W'li/'ik'/nk meaning "where the flood waters recede"	178,519	686.50 sq mi (1,778 km2)
Logan County	091	Bellefontaine	Mar 1, 1818	Champaign County	General Benjamin Logan (c. 1742 – 1802), who destroyed Shawnee Indian towns in the county	46,150	458.44 sq mi (1,187 km2)
Lorain County	093	Elyria	Dec 26, 1822	Huron, Cuyahoga, and Medina Counties	Province of Lorraine, France	312,964	492.50 sq mi (1,276 km2)
Lucas County	095	Toledo	Jun 20, 1835	Wood, Sandusky, and Huron Counties	Robert Lucas (1781–1853), Governor of Ohio when the county was created	431,279	340.46 sq mi (882 km2)
Madison County	097	London	Mar 1, 1810	Franklin County	James Madison (1751–1836), fourth President of the United States	43,824	465.44 sq mi (1,205 km2)
Mahoning County	099	Youngstown	Mar 1, 1846	Columbiana and Trumbull Counties	Mahoning River, from a Lenape word meaning "at the licks"	228,614	415.25 sq mi (1,075 km2)
Marion County	101	Marion	Apr 1, 1820	Delaware County	General Francis Marion (1732–1795), lieutenant colonel in the Continental Army and later brigadier general in the American Revolutionary War	65,359	403.84 sq mi (1,046 km2)
Medina County	103	Medina	Feb 18, 1812	Portage County	Medina, world-renowned religious site in western Saudi Arabia	182,470	423 sq mi (1,096 km2)
Meigs County	105	Pomeroy	Apr 1, 1819	Gallia and Athens Counties	Return Jonathan Meigs, Jr. (1764–1825), Governor of Ohio and Postmaster General at the time the county was organized	22,210	429.42 sq mi (1,112 km2)
Mercer County	107	Celina	Apr 1, 1820	Darke County	General Hugh Mercer (1726–1777), a Revolutionary War officer	42,528	463.27 sq mi (1,200 km2)
Miami County	109	Troy	Mar 1, 1807	Montgomery County	Miami Indians	108,774	407.04 sq mi (1,054 km2)
Monroe County	111	Woodsfield	Jan 29, 1813	Belmont, Washington, and Guernsey Counties	James Monroe (1758–1831), Secretary of State when the county was organized and future President of the United States	13,385	455.54 sq mi (1,180 km2)
Montgomery County	113	Dayton	May 1, 1803	Hamilton and Wayne Counties	General Richard Montgomery (1738–1775), a Revolutionary War officer	537,309	461.68 sq mi (1,196 km2)
Morgan County	115	McConnelsville	Dec 29, 1817	Washington, Guernsey, and Muskingum Counties	General Daniel Morgan (c. 1735 – 1802), a Revolutionary War officer	13,802	417.66 sq mi (1,082 km2)
Morrow County	117	Mount Gilead	Mar 1, 1848	Knox, Marion, Delaware, and Richland Counties	Jeremiah Morrow (1771–1852), Governor of Ohio	34,950	406.22 sq mi (1,052 km2)
Muskingum County	119	Zanesville	Mar 1, 1804	Washington and Fairfield Counties	An Indian word meaning "A town by the river" or "by the river side"	86,410	664.63 sq mi (1,721 km2)
Noble County	121	Caldwell	Apr 1, 1851	Monroe, Washington, Morgan, and Guernsey Counties	Warren P. Noble, an early settler in the area	14,115	399.00 sq mi (1,033 km2)
Ottawa County	123	Port Clinton	Mar 6, 1840	Erie, Sandusky, and Lucas Counties	Named for the Ottawa Indians; Ottawa means "trader" in their language	40,364	254.95 sq mi (660 km2)
Paulding County	125	Paulding	Apr 1, 1820	Darke County	John Paulding (1758–1818), captor of spy John André during the Revolutionary War	18,806	416.26 sq mi (1,078 km2)
Perry County	127	New Lexington	Mar 1, 1818	Washington, Fairfield, and Muskingum Counties	Commodore Oliver Hazard Perry (1785–1819), a naval officer of the War of 1812	35,408	409.78 sq mi (1,061 km2)
Pickaway County	129	Circleville	Mar 1, 1810	Ross, Fairfield, and Franklin Counties	A misspelling of the Piqua tribe, a branch of the Shawnee	58,539	501.91 sq mi (1,300 km2)
Pike County	131	Waverly	Feb 1, 1815	Ross, Scioto, and Adams Counties	General Zebulon M. Pike (1779–1813), a War of 1812 officer and discoverer of Pikes Peak in Colorado in 1806	27,088	441.49 sq mi (1,143 km2)
Portage County	133	Ravenna	Jun 7, 1807	Trumbull County	Derived from an Indian portage	161,791	492.39 sq mi (1,275 km2)
Preble County	135	Eaton	Mar 1, 1808	Montgomery and Butler Counties	Captain Edward Preble (1761–1807), a Naval commander in the Revolutionary War	40,999	424.80 sq mi (1,100 km2)
Putnam County	137	Ottawa	Apr 1, 1820	Shelby County	General Israel Putnam (1718–1790), a Revolutionary War officer	34,451	483.87 sq mi (1,253 km2)
Richland County	139	Mansfield	Mar 1, 1808	Fairfield County	Descriptive of the soil in the area	124,936	496.88 sq mi (1,287 km2)
Ross County	141	Chillicothe	Aug 20, 1798	Adams and Washington Counties	Named for U.S. Senator from Pennsylvania James Ross by territorial governor Arthur St. Clair	77,093	688.41 sq mi (1,783 km2)
Sandusky County	143	Fremont	Apr 1, 1820	Huron County	An Iroquois word meaning "cold water"	58,896	409.18 sq mi (1,060 km2)
Scioto County	145	Portsmouth	May 1, 1803	Adams County	Scioto River; Scioto is a Wyandot Indian word meaning "deer"	74,008	612.27 sq mi (1,586 km2)
Seneca County	147	Tiffin	Apr 1, 1820	Huron County	Seneca Indians, who had a reservation in the county area at the time	55,069	550.59 sq mi (1,426 km2)
Shelby County	149	Sidney	Apr 1, 1819	Miami County	General Isaac Shelby (1750–1826), a Revolutionary War officer and Governor of Kentucky	48,230	409.27 sq mi (1,060 km2)
Stark County	151	Canton	Feb 13, 1808	Columbiana County	General John Stark (1728–1822), a Revolutionary War officer; known as the "Hero of Bennington" for his exemplary service at the Battle of Bennington in 1777	374,853	576.14 sq mi (1,492 km2)
Summit County	153	Akron	Mar 3, 1840	Medina, Portage, and Stark Counties	Its location at the highest elevation along the Ohio and Erie Canal	540,428	419.38 sq mi (1,086 km2)
Trumbull County	155	Warren	Jul 10, 1800	Jefferson and Wayne Counties	Jonathan Trumbull (1710–1785), Governor of Connecticut when the county was organized	201,977	616.48 sq mi (1,597 km2)
Tuscarawas County	157	New Philadelphia	Mar 15, 1808	Muskingum County	Tuscarawas River, meaning "open mouth river" or the Tuscarawas tribe who lived on the river	93,263	567.58 sq mi (1,470 km2)
Union County	159	Marysville	Apr 1, 1820	Delaware, Franklin, Logan, and Madison Counties	It was formed from a union of four counties	62,784	436.65 sq mi (1,131 km2)
Van Wert County	161	Van Wert	Apr 1, 1820	Darke County	Isaac Van Wart (1760–1828), captor of spy John André during the Revolutionary War	28,931	410.09 sq mi (1,062 km2)
Vinton County	163	McArthur	Mar 23, 1850	Athens, Gallia, Hocking, Jackson, and Ross Counties	Samuel Finley Vinton (1792–1862), Ohio Statesman and U.S. Congressman	12,800	414.08 sq mi (1,072 km2)
Warren County	165	Lebanon	May 1, 1803	Hamilton County	General Joseph Warren (1741–1775), a Revolutionary War officer	242,337	399.63 sq mi (1,035 km2)
Washington County	167	Marietta	Jul 27, 1788	One of the original counties	George Washington (1732–1799), commander of the Continental Army, president of the Constitutional Convention, and future President of the United States	59,771	635.15 sq mi (1,645 km2)
Wayne County	169	Wooster	Mar 1, 1808	From non-county area	General Anthony Wayne (1745–1796), a Revolutionary War officer	116,894	555.36 sq mi (1,438 km2)
Williams County	171	Bryan	Apr 1, 1820	Darke County	David Williams (1754–1831), captor of spy John André during the Revolutionary War	37,102	421.74 sq mi (1,092 km2)
Wood County	173	Bowling Green	Apr 1, 1820	Refactored from non-county territory	Eleazer D. Wood (1783–1814), founder of Fort Meigs	132,248	617.32 sq mi (1,599 km2)
Wyandot County	175	Upper Sandusky	Feb 3, 1845	Marion, Crawford, and Hardin Counties	Wyandot Indians	21,900	405.61 sq mi (1,051 km2)

References

• History of Ohio: From the Glacial Period to the Present Time. Press of F. J. Heer. 1905. Retrieved 2007-08-18.
• Laning, J.F. (1896). "The Evolution of Ohio Counties". Ohio Archaeological and Historical Publications. V: 326–350. Archived from the original on November 21, 2015. Other editions available at ISBN 1249686741 and Google Books
• Downes, Randolph Chandler. "Evolution of Ohio County Boundaries". Ohio Archaeological and Historical Publications. 36: 340–477. Archived from the original on November 5, 2014.
• Taylor, William Alexander; Taylor, Aubrey Clarence (1899). Ohio statesmen and annals of progress: from the year 1788 to the year 1900 ... State of Ohio.