Ohio

Ohio has 88 Counties.

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  • County Commissioners Association of Ohio
    209 East State Street
    Columbus, OH 43215-4195
    Phone: (614)221-5627
    Fax: (614)221-6986
    http://www.ccao.org

    County NACo
    Member
    2010
    Population
    Square
    Miles
    County Seat Board
    Size
    Founded
    Adams   28,550 584 West Union   1797 
    Allen   106,331 403 Lima   1820 
    Ashland   53,139 423 Ashland   1846 
    Ashtabula   101,497 702 Jefferson   1807 
    Athens 64,757 504 Athens  1805 
    Auglaize 45,949 401 Wapakoneta   1848 
    Belmont 70,400 532 Saint Clairsville   1801 
    Brown 44,846 490 Georgetown   1817 
    Butler   368,130 467 Hamilton   1803 
    Carroll 28,836 395 Carrollton   1832 
    Champaign 40,097 429 Urbana   1805 
    Clark 138,333 397 Springfield   1817 
    Clermont 197,363 452 Batavia   1800 
    Clinton 42,040 409 Wilmington   1810 
    Columbiana   107,841 532 Lisbon   1803 
    Coshocton   36,901 564 Coshocton   1811 
    Crawford   43,784 402 Bucyrus   1820 
    Cuyahoga 1,280,122 457 Cleveland   11  1808 
    Darke   52,959 598 Greenville   1809 
    Defiance 39,037 411 Defiance   1845 
    Delaware 174,214 443 Delaware   1808 
    Erie 77,079 252 Sandusky   1838 
    Fairfield   146,156 504 Lancaster   1800 
    Fayette 29,030 406 Washington Court House  1810 
    Franklin 1,163,414 532 Columbus   1803 
    Fulton 42,698 405 Wauseon   1850 
    Gallia 30,934 467 Gallipolis   1803 
    Geauga   93,389 400 Chardon   1805 
    Greene   161,573 414 Xenia   1803 
    Guernsey   40,087 522 Cambridge   1810 
    Hamilton 802,374 406 Cincinnati  1790 
    Hancock   74,782 531 Findlay   1820 
    Hardin   32,058 470 Kenton   1820 
    Harrison   15,864 402 Cadiz   1813 
    Henry   28,215 416 Napoleon   1820 
    Highland   43,589 553 Hillsboro   1805 
    Hocking 29,380 421 Logan   1818 
    Holmes 42,366 423 Millersburg   1824 
    Huron   59,626 492 Norwalk   1815 
    Jackson 33,225 420 Jackson   1816 
    Jefferson 69,709 408 Steubenville   1797 
    Knox 60,921 525 Mount Vernon   1808 
    Lake 230,041 227 Painesville   1840 
    Lawrence 62,450 453 Ironton   1815 
    Licking   166,492 683 Newark   1808 
    Logan   45,858 458 Bellefontaine   1817 
    Lorain 301,356 491 Elyria   1822 
    Lucas 441,815 341 Toledo   1835 
    Madison 43,435 466 London   1810 
    Mahoning 238,823 412 Youngstown   1846 
    Marion 66,501 404 Marion   1820 
    Medina   172,332 421 Medina   1812 
    Meigs   23,770 430 Pomeroy   1819 
    Mercer   40,814 462 Celina   1820 
    Miami   102,506 407 Troy   1807 
    Monroe   14,642 456 Woodsfield   1813 
    Montgomery 535,153 462 Dayton   1803 
    Morgan   15,054 416 McConnelsville   1817 
    Morrow 34,827 406 Mount Gilead   1848 
    Muskingum 86,074 665 Zanesville   1804 
    Noble   14,645 398 Caldwell   1851 
    Ottawa 41,428 255 Port Clinton   1840 
    Paulding 19,614 416 Paulding   1820 
    Perry   36,058 408 New Lexington   1817 
    Pickaway   55,698 501 Circleville   1810 
    Pike 28,709 440 Waverly   1815 
    Portage 161,419 487 Ravenna   1807 
    Preble 42,270 424 Eaton   1808 
    Putnam   34,499 483 Ottawa   1820 
    Richland 124,475 495 Mansfield   1813 
    Ross 78,064 689 Chillicothe   1798 
    Sandusky 60,944 408 Fremont   1820 
    Scioto 79,499 610 Portsmouth   1803 
    Seneca   56,745 551 Tiffin   1820 
    Shelby   49,423 408 Sidney   1819 
    Stark   375,586 575 Canton   1808 
    Summit 541,781 413 Akron  11  1840 
    Trumbull 210,312 618 Warren   1800 
    Tuscarawas   92,582 568 New Philadelphia   1808 
    Union 52,300 432 Marysville   1820 
    Van Wert 28,744 409 Van Wert   1820 
    Vinton   13,435 412 McArthur   1850 
    Warren 212,693 401 Lebanon   1803 
    Washington 61,778 632 Marietta   1788 
    Wayne   114,520 555 Wooster   1786 
    Williams 37,642 421 Bryan   1820 
    Wood 125,488 617 Bowling Green   1820 
    Wyandot 22,615 407 Upper Sandusky   1845