Ohio

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County Commissioners Association of Ohio
209 E State St
Columbus, OH 43215-4309
Phone: (614)221-5627
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