Ohio County Map
Ohio consists of 88 counties, each of which functions as a local government unit.
Image info: Size: 1200x1248px / 410 Kb, file format: JPEG, Author: Mapsius.com Team
About the map:
This Ohio County Map shows the state border, county borders, and county names.
Attribution is required! You may download, print or use the above map for educational, personal and non-commercial purposes. You must place a hyperlink (to this page) with attribution next to the image you use.
Map of Counties and County Seats in Ohio
Image info: Size: 1300x1352px / 671 Kb, file format: JPEG, Author: Mapsius.com Team
About the map:
This Map of Counties and County Seats in Ohio shows state borders, state names, state capital city, county borders, county names and county seats.
County seats are indicated by a red circle, the state capital city is indicated by a star in the red circle. The larger the city in terms of population, the larger the circle on the map and the larger the font of the city name.
Attribution is required! You may download, print or use the above map for educational, personal and non-commercial purposes. You must place a hyperlink (to this page) with attribution next to the image you use.
List of counties in Ohio
Ohio consists of 88 counties, each of which is an administrative region of the state. Ashtabula County, the largest in area, covers approximately 702 square miles (1,819 km2). Franklin County, the most populous, is home to more than 1,361,000 people.
| County | County Seat | Area | Population (2025)[1] | FIPS Code |
|---|---|---|---|---|
| Adams County | West Union | 583.91 sq mi (1,512 km2) | 27,865 | 001 |
| Allen County | Lima | 404.43 sq mi (1,047 km2) | 100,881 | 003 |
| Ashland County | Ashland | 424.37 sq mi (1,099 km2) | 52,523 | 005 |
| Ashtabula County | Jefferson | 702.44 sq mi (1,819 km2) | 96,713 | 007 |
| Athens County | Athens | 506.76 sq mi (1,313 km2) | 63,197 | 009 |
| Auglaize County | Wapakoneta | 401.25 sq mi (1,039 km2) | 45,909 | 011 |
| Belmont County | St. Clairsville | 537.35 sq mi (1,392 km2) | 64,434 | 013 |
| Brown County | Georgetown | 491.76 sq mi (1,274 km2) | 44,397 | 015 |
| Butler County | Hamilton | 467.27 sq mi (1,210 km2) | 400,128 | 017 |
| Carroll County | Carrollton | 394.67 sq mi (1,022 km2) | 26,475 | 019 |
| Champaign County | Urbana | 428.56 sq mi (1,110 km2) | 38,820 | 021 |
| Clark County | Springfield | 399.86 sq mi (1,036 km2) | 135,340 | 023 |
| Clermont County | Batavia | 451.99 sq mi (1,171 km2) | 216,977 | 025 |
| Clinton County | Wilmington | 410.88 sq mi (1,064 km2) | 42,301 | 027 |
| Columbiana County | Lisbon | 532.46 sq mi (1,379 km2) | 99,377 | 029 |
| Coshocton County | Coshocton | 564.07 sq mi (1,461 km2) | 37,188 | 031 |
| Crawford County | Bucyrus | 402.11 sq mi (1,041 km2) | 41,896 | 033 |
| Cuyahoga County | Cleveland | 458.49 sq mi (1,187 km2) | 1,232,925 | 035 |
| Darke County | Greenville | 599.80 sq mi (1,553 km2) | 51,520 | 037 |
| Defiance County | Defiance | 411.16 sq mi (1,065 km2) | 38,292 | 039 |
| Delaware County | Delaware | 442.41 sq mi (1,146 km2) | 242,032 | 041 |
| Erie County | Sandusky | 254.88 sq mi (660 km2) | 73,296 | 043 |
| Fairfield County | Lancaster | 505.11 sq mi (1,308 km2) | 169,752 | 045 |
| Fayette County | Washington Court House | 406.58 sq mi (1,053 km2) | 28,552 | 047 |
| Franklin County | Columbus | 539.87 sq mi (1,398 km2) | 1,361,536 | 049 |
| Fulton County | Wauseon | 406.78 sq mi (1,054 km2) | 41,853 | 051 |
| Gallia County | Gallipolis | 468.78 sq mi (1,214 km2) | 29,072 | 053 |
| Geauga County | Chardon | 403.66 sq mi (1,045 km2) | 95,676 | 055 |
| Greene County | Xenia | 414.88 sq mi (1,075 km2) | 174,322 | 057 |
| Guernsey County | Cambridge | 521.90 sq mi (1,352 km2) | 38,379 | 059 |
| Hamilton County | Cincinnati | 407.36 sq mi (1,055 km2) | 838,418 | 061 |
| Hancock County | Findlay | 531.35 sq mi (1,376 km2) | 75,034 | 063 |
| Hardin County | Kenton | 470.29 sq mi (1,218 km2) | 30,072 | 065 |
| Harrison County | Cadiz | 403.53 sq mi (1,045 km2) | 14,070 | 067 |
| Henry County | Napoleon | 416.50 sq mi (1,079 km2) | 27,598 | 069 |
| Highland County | Hillsboro | 553.28 sq mi (1,433 km2) | 43,823 | 071 |
| Hocking County | Logan | 422.75 sq mi (1,095 km2) | 27,512 | 073 |
| Holmes County | Millersburg | 422.99 sq mi (1,096 km2) | 44,970 | 075 |
| Huron County | Norwalk | 492.69 sq mi (1,276 km2) | 58,250 | 077 |
| Jackson County | Jackson | 420.28 sq mi (1,089 km2) | 32,817 | 079 |
| Jefferson County | Steubenville | 409.61 sq mi (1,061 km2) | 63,597 | 081 |
| Knox County | Mount Vernon | 527.12 sq mi (1,365 km2) | 64,002 | 083 |
| Lake County | Painesville | 228.21 sq mi (591 km2) | 232,217 | 085 |
| Lawrence County | Ironton | 454.96 sq mi (1,178 km2) | 55,710 | 087 |
| Licking County | Newark | 686.50 sq mi (1,778 km2) | 185,564 | 089 |
| Logan County | Bellefontaine | 458.44 sq mi (1,187 km2) | 46,302 | 091 |
| Lorain County | Elyria | 492.50 sq mi (1,276 km2) | 323,219 | 093 |
| Lucas County | Toledo | 340.46 sq mi (882 km2) | 423,347 | 095 |
| Madison County | London | 465.44 sq mi (1,205 km2) | 46,985 | 097 |
| Mahoning County | Youngstown | 415.25 sq mi (1,075 km2) | 224,706 | 099 |
| Marion County | Marion | 403.84 sq mi (1,046 km2) | 65,115 | 101 |
| Medina County | Medina | 423 sq mi (1,096 km2) | 185,025 | 103 |
| Meigs County | Pomeroy | 429.42 sq mi (1,112 km2) | 21,587 | 105 |
| Mercer County | Celina | 463.27 sq mi (1,200 km2) | 42,737 | 107 |
| Miami County | Troy | 407.04 sq mi (1,054 km2) | 112,634 | 109 |
| Monroe County | Woodsfield | 455.54 sq mi (1,180 km2) | 12,994 | 111 |
| Montgomery County | Dayton | 461.68 sq mi (1,196 km2) | 539,598 | 113 |
| Morgan County | McConnelsville | 417.66 sq mi (1,082 km2) | 13,626 | 115 |
| Morrow County | Mount Gilead | 406.22 sq mi (1,052 km2) | 36,305 | 117 |
| Muskingum County | Zanesville | 664.63 sq mi (1,721 km2) | 87,014 | 119 |
| Noble County | Caldwell | 399.00 sq mi (1,033 km2) | 14,276 | 121 |
| Ottawa County | Port Clinton | 254.95 sq mi (660 km2) | 39,481 | 123 |
| Paulding County | Paulding | 416.26 sq mi (1,078 km2) | 18,727 | 125 |
| Perry County | New Lexington | 409.78 sq mi (1,061 km2) | 35,918 | 127 |
| Pickaway County | Circleville | 501.91 sq mi (1,300 km2) | 62,978 | 129 |
| Pike County | Waverly | 441.49 sq mi (1,143 km2) | 27,061 | 131 |
| Portage County | Ravenna | 492.39 sq mi (1,275 km2) | 163,404 | 133 |
| Preble County | Eaton | 424.80 sq mi (1,100 km2) | 40,664 | 135 |
| Putnam County | Ottawa | 483.87 sq mi (1,253 km2) | 34,380 | 137 |
| Richland County | Mansfield | 496.88 sq mi (1,287 km2) | 124,893 | 139 |
| Ross County | Chillicothe | 688.41 sq mi (1,783 km2) | 76,429 | 141 |
| Sandusky County | Fremont | 409.18 sq mi (1,060 km2) | 58,655 | 143 |
| Scioto County | Portsmouth | 612.27 sq mi (1,586 km2) | 71,365 | 145 |
| Seneca County | Tiffin | 550.59 sq mi (1,426 km2) | 54,522 | 147 |
| Shelby County | Sidney | 409.27 sq mi (1,060 km2) | 48,065 | 149 |
| Stark County | Canton | 576.14 sq mi (1,492 km2) | 373,771 | 151 |
| Summit County | Akron | 419.38 sq mi (1,086 km2) | 538,376 | 153 |
| Trumbull County | Warren | 616.48 sq mi (1,597 km2) | 198,972 | 155 |
| Tuscarawas County | New Philadelphia | 567.58 sq mi (1,470 km2) | 92,373 | 157 |
| Union County | Marysville | 436.65 sq mi (1,131 km2) | 73,446 | 159 |
| Van Wert County | Van Wert | 410.09 sq mi (1,062 km2) | 29,013 | 161 |
| Vinton County | McArthur | 414.08 sq mi (1,072 km2) | 12,645 | 163 |
| Warren County | Lebanon | 399.63 sq mi (1,035 km2) | 257,181 | 165 |
| Washington County | Marietta | 635.15 sq mi (1,645 km2) | 58,389 | 167 |
| Wayne County | Wooster | 555.36 sq mi (1,438 km2) | 116,758 | 169 |
| Williams County | Bryan | 421.74 sq mi (1,092 km2) | 36,549 | 171 |
| Wood County | Bowling Green | 617.32 sq mi (1,599 km2) | 134,176 | 173 |
| Wyandot County | Upper Sandusky | 405.61 sq mi (1,051 km2) | 21,567 | 175 |