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Ohio There are 88 Counties in Ohio Click the state map for a larger view or select a county from the list below to view a listing of the county officials and other information pertaining to that county.

Related Links for Ohio Places/Cities in Ohio Population Figures for Ohio PILT Figures for Ohio SCAAP Funding for Ohio Census Bureau Profile FEDSTATS State of Ohio Web Site 50states.com Congressional District Maps County Commissioners Association of Ohio 209 East State Street Columbus, OH 43215-4195 Phone: (614)221-5627 Fax: (614)221-6986 Home Page: http://www.ccao.org

County	NACo Member	2000 Population	Square Miles	County Seat	Founded
Adams		27,330	584	West Union	1797
Allen		108,473	404	Lima	1820
Ashland		52,523	424	Ashland	1846
Ashtabula		102,728	703	Jefferson	1807
Athens		62,223	507	Athens	1805
Auglaize		46,611	401	Wapakoneta	1848
Belmont		70,226	537	Saint Clairsville	1801
Brown		42,285	492	Georgetown	1817
Butler		332,807	467	Hamilton	1803
Carroll		28,836	395	Carrollton	1832
Champaign		38,890	429	Urbana	1805
Clark		144,742	400	Springfield	1817
Clermont		177,977	452	Batavia	1800
Clinton		40,543	411	Wilmington	1810
Columbiana		112,075	532	Lisbon	1803
Coshocton		36,655	564	Coshocton	1811
Crawford		46,966	402	Bucyrus	1820
Cuyahoga		1,393,978	458	Cleveland	1808
Darke		53,309	600	Greenville	1809
Defiance		39,500	411	Defiance	1845
Delaware		109,989	442	Delaware	1808
Erie		79,551	254	Sandusky	1838
Fairfield		122,759	506	Lancaster	1800
Fayette		28,433	407	Washington Court House	1810
Franklin		1,068,978	540	Columbus	1803
Fulton		42,084	407	Wauseon	1850
Gallia		31,069	469	Gallipolis	1803
Geauga		90,895	404	Chardon	1805
Greene		147,886	415	Xenia	1803
Guernsey		40,792	522	Cambridge	1810
Hamilton		845,303	407	Cincinnati	1790
Hancock		71,295	531	Findlay	1820
Hardin		31,945	470	Kenton	1820
Harrison		15,856	404	Cadiz	1813
Henry		29,210	416	Napoleon	1820
Highland		40,875	553	Hillsboro	1805
Hocking		28,241	423	Logan	1818
Holmes		38,943	423	Millersburg	1824
Huron		59,487	493	Norwalk	1815
Jackson		32,641	420	Jackson	1816
Jefferson		73,894	410	Steubenville	1797
Knox		54,500	527	Mount Vernon	1808
Lake		227,511	228	Painesville	1840
Lawrence		62,319	455	Ironton	1815
Licking		145,491	686	Newark	1808
Logan		46,005	458	Bellefontaine	1817
Lorain		284,664	493	Elyria	1822
Lucas		455,054	340	Toledo	1835
Madison		40,213	465	London	1810
Mahoning		257,555	415	Youngstown	1846
Marion		66,217	404	Marion	1820
Medina		151,095	422	Medina	1812
Meigs		23,072	430	Pomeroy	1819
Mercer		40,924	463	Celina	1820
Miami		98,868	407	Troy	1807
Monroe		15,180	456	Woodsfield	1813
Montgomery		559,062	462	Dayton	1803
Morgan		14,897	418	McConnelsville	1817
Morrow		31,628	406	Mount Gilead	1848
Muskingum		84,585	665	Zanesville	1804
Noble		14,058	399	Caldwell	1851
Ottawa		40,985	255	Port Clinton	1840
Paulding		20,293	416	Paulding	1820
Perry		34,078	410	New Lexington	1817
Pickaway		52,727	502	Circleville	1810
Pike		27,695	442	Waverly	1815
Portage		152,061	492	Ravenna	1807
Preble		42,337	425	Eaton	1808
Putnam		34,726	484	Ottawa	1820
Richland		128,852	497	Mansfield	1813
Ross		73,345	688	Chillicothe	1798
Sandusky		61,792	409	Fremont	1820
Scioto		79,195	612	Portsmouth	1803
Seneca		58,683	551	Tiffin	1820
Shelby		47,910	409	Sidney	1819
Stark		378,098	576	Canton	1808
Summit		542,899	413	Akron	1840
Trumbull		225,116	616	Warren	1800
Tuscarawas		90,914	568	New Philadelphia	1808
Union		40,909	437	Marysville	1820
Van Wert		29,659	410	Van Wert	1820
Vinton		12,806	414	McArthur	1850
Warren		158,383	400	Lebanon	1803
Washington		63,251	635	Marietta	1788
Wayne		111,564	555	Wooster	1786
Williams		39,188	422	Bryan	1820
Wood		121,065	617	Bowling Green	1820
Wyandot		22,908	406	Upper Sandusky	1845

To report any updates, deletions or additions, contact Database Updates or send a fax to NACo, Attn: Database Updates (202)393-2630.