Member
Population
Miles
Size
OhioOhio has 88 Counties.
|
Ohio Data Sets Ohio Links |
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 | 3 | 1797 | |
| Allen | 106,331 | 403 | Lima | 3 | 1820 | |
| Ashland | 53,139 | 423 | Ashland | 3 | 1846 | |
| Ashtabula | 101,497 | 702 | Jefferson | 3 | 1807 | |
| Athens | |
64,757 | 504 | Athens | 3 | 1805 |
| Auglaize | |
45,949 | 401 | Wapakoneta | 3 | 1848 |
| Belmont | |
70,400 | 532 | Saint Clairsville | 3 | 1801 |
| Brown | |
44,846 | 490 | Georgetown | 3 | 1817 |
| Butler | 368,130 | 467 | Hamilton | 3 | 1803 | |
| Carroll | |
28,836 | 395 | Carrollton | 3 | 1832 |
| Champaign | |
40,097 | 429 | Urbana | 3 | 1805 |
| Clark | |
138,333 | 397 | Springfield | 3 | 1817 |
| Clermont | |
197,363 | 452 | Batavia | 3 | 1800 |
| Clinton | |
42,040 | 409 | Wilmington | 3 | 1810 |
| Columbiana | 107,841 | 532 | Lisbon | 3 | 1803 | |
| Coshocton | 36,901 | 564 | Coshocton | 3 | 1811 | |
| Crawford | 43,784 | 402 | Bucyrus | 3 | 1820 | |
| Cuyahoga | |
1,280,122 | 457 | Cleveland | 11 | 1808 |
| Darke | 52,959 | 598 | Greenville | 3 | 1809 | |
| Defiance | |
39,037 | 411 | Defiance | 3 | 1845 |
| Delaware | |
174,214 | 443 | Delaware | 3 | 1808 |
| Erie | |
77,079 | 252 | Sandusky | 3 | 1838 |
| Fairfield | 146,156 | 504 | Lancaster | 3 | 1800 | |
| Fayette | |
29,030 | 406 | Washington Court House | 3 | 1810 |
| Franklin | |
1,163,414 | 532 | Columbus | 3 | 1803 |
| Fulton | |
42,698 | 405 | Wauseon | 3 | 1850 |
| Gallia | |
30,934 | 467 | Gallipolis | 3 | 1803 |
| Geauga | |
93,389 | 400 | Chardon | 3 | 1805 |
| Greene | 161,573 | 414 | Xenia | 3 | 1803 | |
| Guernsey | 40,087 | 522 | Cambridge | 3 | 1810 | |
| Hamilton | |
802,374 | 406 | Cincinnati | 3 | 1790 |
| Hancock | 74,782 | 531 | Findlay | 3 | 1820 | |
| Hardin | 32,058 | 470 | Kenton | 3 | 1820 | |
| Harrison | 15,864 | 402 | Cadiz | 3 | 1813 | |
| Henry | 28,215 | 416 | Napoleon | 3 | 1820 | |
| Highland | 43,589 | 553 | Hillsboro | 3 | 1805 | |
| Hocking | |
29,380 | 421 | Logan | 3 | 1818 |
| Holmes | |
42,366 | 423 | Millersburg | 3 | 1824 |
| Huron | 59,626 | 492 | Norwalk | 3 | 1815 | |
| Jackson | |
33,225 | 420 | Jackson | 3 | 1816 |
| Jefferson | |
69,709 | 408 | Steubenville | 3 | 1797 |
| Knox | |
60,921 | 525 | Mount Vernon | 3 | 1808 |
| Lake | |
230,041 | 227 | Painesville | 3 | 1840 |
| Lawrence | |
62,450 | 453 | Ironton | 3 | 1815 |
| Licking | 166,492 | 683 | Newark | 3 | 1808 | |
| Logan | 45,858 | 458 | Bellefontaine | 3 | 1817 | |
| Lorain | |
301,356 | 491 | Elyria | 3 | 1822 |
| Lucas | 441,815 | 341 | Toledo | 3 | 1835 | |
| Madison | |
43,435 | 466 | London | 3 | 1810 |
| Mahoning | |
238,823 | 412 | Youngstown | 3 | 1846 |
| Marion | |
66,501 | 404 | Marion | 3 | 1820 |
| Medina | 172,332 | 421 | Medina | 3 | 1812 | |
| Meigs | 23,770 | 430 | Pomeroy | 3 | 1819 | |
| Mercer | 40,814 | 462 | Celina | 3 | 1820 | |
| Miami | 102,506 | 407 | Troy | 3 | 1807 | |
| Monroe | 14,642 | 456 | Woodsfield | 3 | 1813 | |
| Montgomery | |
535,153 | 462 | Dayton | 3 | 1803 |
| Morgan | 15,054 | 416 | McConnelsville | 3 | 1817 | |
| Morrow | |
34,827 | 406 | Mount Gilead | 3 | 1848 |
| Muskingum | |
86,074 | 665 | Zanesville | 3 | 1804 |
| Noble | 14,645 | 398 | Caldwell | 3 | 1851 | |
| Ottawa | |
41,428 | 255 | Port Clinton | 3 | 1840 |
| Paulding | |
19,614 | 416 | Paulding | 3 | 1820 |
| Perry | 36,058 | 408 | New Lexington | 3 | 1817 | |
| Pickaway | 55,698 | 501 | Circleville | 3 | 1810 | |
| Pike | |
28,709 | 440 | Waverly | 3 | 1815 |
| Portage | |
161,419 | 487 | Ravenna | 3 | 1807 |
| Preble | |
42,270 | 424 | Eaton | 3 | 1808 |
| Putnam | 34,499 | 483 | Ottawa | 3 | 1820 | |
| Richland | |
124,475 | 495 | Mansfield | 3 | 1813 |
| Ross | |
78,064 | 689 | Chillicothe | 3 | 1798 |
| Sandusky | |
60,944 | 408 | Fremont | 3 | 1820 |
| Scioto | |
79,499 | 610 | Portsmouth | 3 | 1803 |
| Seneca | 56,745 | 551 | Tiffin | 3 | 1820 | |
| Shelby | 49,423 | 408 | Sidney | 3 | 1819 | |
| Stark | 375,586 | 575 | Canton | 3 | 1808 | |
| Summit | |
541,781 | 413 | Akron | 11 | 1840 |
| Trumbull | |
210,312 | 618 | Warren | 3 | 1800 |
| Tuscarawas | 92,582 | 568 | New Philadelphia | 3 | 1808 | |
| Union | |
52,300 | 432 | Marysville | 3 | 1820 |
| Van Wert | |
28,744 | 409 | Van Wert | 3 | 1820 |
| Vinton | 13,435 | 412 | McArthur | 3 | 1850 | |
| Warren | |
212,693 | 401 | Lebanon | 3 | 1803 |
| Washington | |
61,778 | 632 | Marietta | 3 | 1788 |
| Wayne | 114,520 | 555 | Wooster | 3 | 1786 | |
| Williams | |
37,642 | 421 | Bryan | 3 | 1820 |
| Wood | |
125,488 | 617 | Bowling Green | 3 | 1820 |
| Wyandot | |
22,615 | 407 | Upper Sandusky | 3 | 1845 |