88 Counties — ohio
| County | Type | Population | Land area |
|---|
| adams | County | 27,330 | 584 sq mi |
| allen | County | 108,473 | 405 sq mi |
| ashland | County | 52,523 | 424 sq mi |
| ashtabula | County | 102,728 | 703 sq mi |
| athens | County | 62,223 | 507 sq mi |
| auglaize | County | 46,611 | 401 sq mi |
| belmont | County | 70,226 | 537 sq mi |
| brown | County | 42,285 | 492 sq mi |
| butler | County | 332,807 | 467 sq mi |
| carroll | County | 28,836 | 395 sq mi |
| champaign | County | 38,890 | 429 sq mi |
| clark | County | 144,742 | 400 sq mi |
| clermont | County | 177,977 | 452 sq mi |
| clinton | County | 40,543 | 411 sq mi |
| columbiana | County | 112,075 | 533 sq mi |
| coshocton | County | 36,655 | 564 sq mi |
| crawford | County | 46,966 | 402 sq mi |
| cuyahoga | County | 1,393,978 | 458 sq mi |
| darke | County | 53,309 | 600 sq mi |
| defiance | County | 39,500 | 411 sq mi |
| delaware | County | 109,989 | 443 sq mi |
| erie | County | 79,551 | 255 sq mi |
| fairfield | County | 122,759 | 506 sq mi |
| fayette | County | 28,433 | 407 sq mi |
| franklin | County | 1,068,978 | 540 sq mi |
| fulton | County | 42,084 | 407 sq mi |
| gallia | County | 31,069 | 469 sq mi |
| geauga | County | 90,895 | 404 sq mi |
| greene | County | 147,886 | 415 sq mi |
| guernsey | County | 40,792 | 522 sq mi |
| hamilton | County | 845,303 | 407 sq mi |
| hancock | County | 71,295 | 531 sq mi |
| hardin | County | 31,945 | 470 sq mi |
| harrison | County | 15,856 | 404 sq mi |
| henry | County | 29,210 | 417 sq mi |
| highland | County | 40,875 | 553 sq mi |
| hocking | County | 28,241 | 423 sq mi |
| holmes | County | 38,943 | 423 sq mi |
| huron | County | 59,487 | 493 sq mi |
| jackson | County | 32,641 | 420 sq mi |
| jefferson | County | 73,894 | 410 sq mi |
| knox | County | 54,500 | 527 sq mi |
| lake | County | 227,511 | 228 sq mi |
| lawrence | County | 62,319 | 455 sq mi |
| licking | County | 145,491 | 687 sq mi |
| logan | County | 46,005 | 459 sq mi |
| lorain | County | 284,664 | 493 sq mi |
| lucas | County | 455,054 | 340 sq mi |
| madison | County | 40,213 | 465 sq mi |
| mahoning | County | 257,555 | 415 sq mi |
| marion | County | 66,217 | 404 sq mi |
| medina | County | 151,095 | 422 sq mi |
| meigs | County | 23,072 | 430 sq mi |
| mercer | County | 40,924 | 463 sq mi |
| miami | County | 98,868 | 407 sq mi |
| monroe | County | 15,180 | 456 sq mi |
| montgomery | County | 559,062 | 462 sq mi |
| morgan | County | 14,897 | 418 sq mi |
| morrow | County | 31,628 | 406 sq mi |
| muskingum | County | 84,585 | 665 sq mi |
| noble | County | 14,058 | 399 sq mi |
| ottawa | County | 40,985 | 255 sq mi |
| paulding | County | 20,293 | 416 sq mi |
| perry | County | 34,078 | 410 sq mi |
| pickaway | County | 52,727 | 502 sq mi |
| pike | County | 27,695 | 442 sq mi |
| portage | County | 152,061 | 492 sq mi |
| preble | County | 42,337 | 425 sq mi |
| putnam | County | 34,726 | 484 sq mi |
| richland | County | 128,852 | 497 sq mi |
| ross | County | 73,345 | 689 sq mi |
| sandusky | County | 61,792 | 409 sq mi |
| scioto | County | 79,195 | 612 sq mi |
| seneca | County | 58,683 | 551 sq mi |
| shelby | County | 47,910 | 409 sq mi |
| stark | County | 378,098 | 576 sq mi |
| summit | County | 542,899 | 413 sq mi |
| trumbull | County | 225,116 | 616 sq mi |
| tuscarawas | County | 90,914 | 568 sq mi |
| union | County | 40,909 | 437 sq mi |
| van wert | County | 29,659 | 410 sq mi |
| vinton | County | 12,806 | 414 sq mi |
| warren | County | 158,383 | 400 sq mi |
| washington | County | 63,251 | 635 sq mi |
| wayne | County | 111,564 | 555 sq mi |
| williams | County | 39,188 | 422 sq mi |
| wood | County | 121,065 | 617 sq mi |
| wyandot | County | 22,908 | 406 sq mi |