Ohio (OH) on the US Map
Below is a map of the 88 counties of Ohio (you can click on the map to enlarge it and to see the major city in each state).
Interactive Map of Ohio Counties
Click on any of the counties on the map to see the county’s population, economic data, time zone, and zip code (the data will appear below the map). Data is sourced from the US Census 2021.
List of the Counties of New Ohio:
| County | Population | Per sq. km | Largest City |
|---|---|---|---|
| Adams County | 27,564 | 18.23 | West Union |
| Allen County | 102,462 | 98.28 | Lima |
| Ashland County | 52,658 | 48.07 | Ashland |
| Ashtabula County | 97,869 | 53.82 | Ashtabula |
| Athens County | 62,933 | 48.25 | Athens |
| Auglaize County | 46,282 | 44.52 | Wapakoneta |
| Belmont County | 67,077 | 48.67 | Martins Ferry |
| Brown County | 43,694 | 34.46 | Georgetown |
| Butler County | 387,830 | 320.97 | Middletown |
| Carroll County | 26,866 | 26.29 | Minerva |
| Champaign County | 38,678 | 34.81 | Urbana |
| Clark County | 136,032 | 132.34 | Springfield |
| Clermont County | 207,650 | 177.16 | Loveland |
| Clinton County | 42,046 | 39.72 | Wilmington |
| Columbiana County | 102,331 | 74.28 | Salem |
| Coshocton County | 36,621 | 25.07 | Coshocton |
| Crawford County | 41,939 | 40.3 | Bucyrus |
| Cuyahoga County | 1,263,667 | 1067.13 | Cleveland |
| Darke County | 51,839 | 33.46 | Greenville |
| Defiance County | 38,329 | 35.97 | Defiance |
| Delaware County | 211,121 | 183.94 | Columbus |
| Erie County | 75,560 | 116.1 | Sandusky |
| Fairfield County | 157,622 | 120.66 | Columbus |
| Fayette County | 28,897 | 27.46 | Washington Court House |
| Franklin County | 1,313,598 | 952.6 | Columbus |
| Fulton County | 42,709 | 40.67 | Wauseon |
| Gallia County | 29,369 | 24.31 | Gallipolis |
| Geauga County | 95,408 | 92.02 | Bainbridge |
| Greene County | 167,043 | 155.95 | Kettering |
| Guernsey County | 38,542 | 28.49 | Cambridge |
| Hamilton County | 826,790 | 787.4 | Cincinnati |
| Hancock County | 75,139 | 54.6 | Findlay |
| Hardin County | 30,738 | 25.24 | Kenton |
| Harrison County | 14,623 | 14.03 | Cadiz |
| Henry County | 27,618 | 25.63 | Napoleon |
| Highland County | 43,162 | 30.13 | Hillsboro |
| Hocking County | 28,180 | 25.82 | Logan |
| Holmes County | 44,166 | 40.35 | Millersburg |
| Huron County | 58,583 | 45.95 | Norwalk |
| Jackson County | 32,531 | 29.88 | Jackson |
| Jefferson County | 65,620 | 62.08 | Steubenville |
| Knox County | 62,399 | 45.85 | Mount Vernon |
| Lake County | 232,202 | 391.04 | Mentor |
| Lawrence County | 58,570 | 49.88 | Ironton |
| Licking County | 177,454 | 100.4 | Newark |
| Logan County | 45,997 | 38.73 | Bellefontaine |
| Lorain County | 311,737 | 245.37 | Lorain |
| Lucas County | 431,212 | 490.17 | Toledo |
| Madison County | 43,947 | 36.43 | London |
| Mahoning County | 229,044 | 214.91 | Youngstown |
| Marion County | 65,515 | 62.64 | Marion |
| Medina County | 181,448 | 166.23 | Brunswick |
| Meigs County | 22,361 | 20.07 | Middleport |
| Mercer County | 42,154 | 35.19 | Celina |
| Miami County | 107,899 | 102.48 | Huber Heights |
| Monroe County | 13,514 | 11.45 | Woodsfield |
| Montgomery County | 536,136 | 448.69 | Dayton |
| Morgan County | 13,955 | 12.94 | McConnelsville |
| Morrow County | 34,892 | 33.17 | Galion |
| Muskingum County | 86,346 | 50.17 | Zanesville |
| Noble County | 14,166 | 13.74 | Caldwell |
| Ottawa County | 40,479 | 61.36 | Port Clinton |
| Paulding County | 18,858 | 17.48 | Paulding |
| Perry County | 35,439 | 33.54 | New Lexington |
| Pickaway County | 58,458 | 45.03 | Circleville |
| Pike County | 27,271 | 23.92 | Waverly |
| Portage County | 161,897 | 128.25 | Kent |
| Preble County | 41,027 | 37.34 | Eaton |
| Putnam County | 34,395 | 27.52 | Ottawa |
| Richland County | 124,504 | 97.07 | Mansfield |
| Ross County | 77,205 | 43.25 | Chillicothe |
| Sandusky County | 59,013 | 55.81 | Fremont |
| Scioto County | 74,392 | 47.08 | Portsmouth |
| Seneca County | 55,166 | 38.65 | Tiffin |
| Shelby County | 48,307 | 45.75 | Sidney |
| Stark County | 374,712 | 251.5 | Canton |
| Summit County | 540,567 | 505.61 | Akron |
| Trumbull County | 202,199 | 126.31 | Youngstown |
| Tuscarawas County | 93,025 | 63.3 | New Philadelphia |
| Union County | 61,769 | 55.24 | Dublin |
| Van Wert County | 28,808 | 27.19 | Van Wert |
| Vinton County | 12,853 | 12.03 | McArthur |
| Warren County | 239,556 | 230.41 | Middletown |
| Washington County | 59,942 | 36.62 | Marietta |
| Wayne County | 116,858 | 81.33 | Wooster |
| Williams County | 37,026 | 33.98 | Bryan |
| Wood County | 131,930 | 82.54 | Bowling Green |
| Wyandot County | 21,933 | 20.81 | Upper Sandusky |