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Ohio Counties
Ohio County map
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Ohio Counties

There is eighty-eight counties in the state of Ohio. Washington County the oldest in the state established on July 27, 1788. Noble County was formed on March 11, 1851 from portions of Guernsey, Morgan, Monroe and Washington counties. It was the last county to be formed in Ohio and, therefore, represents the youngest county in the state.

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Ohio Counties: History and Information

Find a brief history of Ohio CountiesBrief history of Ohio Counties: Flags of Our Nation

This is a list of the eighty-eight (88) counties in the state of Ohio. The Ohio Constitution allows counties to set up a charter government as many cities and villages do, but only Summit County has done so.

Ohio is a Midwestern state of the United States. Part of the Great Lakes region, Ohio has long been a cultural and geographical crossroads in North America. At the time of European contact and in the years that followed, Native Americans in today's Ohio included the Shawnee, Iroquois, Miamis, and Wyandots. Beginning in the 1700s, the area was settled by people from New England, the Mid-Atlantic States, Appalachia, and the Upper South.

Ohio was the first state admitted to the Union under the Northwest Ordinance. Its US postal abbreviation is OH; its old-style abbreviation was O. Natives of Ohio are known as Ohioans or Buckeyes, after the buckeye tree.

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