AREA AND POPULATION OF OHIO BY COUNTIES.
| County. | Map Index. |
County Seat. | Area in square miles. |
Population. | |
| 1890. | 1900. | ||||
| Adams | D 8 | West Union | 524 | 26,093 | 26,328 |
| Allen | B 4 | Lima | 405 | 40,644 | 47,976 |
| Ashland | F 4 | Ashland | 424 | 22,223 | 21,184 |
| Ashtabula | J 2 | Jefferson | 691 | 43,655 | 51,448 |
| Athens | F 7 | Athens | 528 | 35,194 | 38,730 |
| Auglaize | B 4 | Wapakoneta | 394 | 28,100 | 31,192 |
| Belmont | H 6 | Saint Clairsville | 611 | 57,413 | 60,875 |
| Brown | C 7 | Georgetown | 430 | 29,899 | 28,237 |
| Butler | A 7 | Hamilton | 498 | 48,597 | 56,870 |
| Carroll | H 4 | Carrollton | 379 | 17,566 | 16,811 |
| Champaign | C 5 | Urbana | 419 | 26,980 | 26,642 |
| Clark | C 6 | Springfield | 403 | 52,277 | 58,939 |
| Clermont | B 7 | Batavia | 431 | 33,553 | 31,610 |
| Clinton | C 7 | Wilmington | 424 | 24,240 | 24,202 |
| Columbiana | J 4 | Lisbon | 504 | 59,029 | 68,590 |
| Coshocton | F 5 | Coshocton | 552 | 26,703 | 29,337 |
| Crawford | E 4 | Bucyrus | 397 | 31,927 | 33,915 |
| Cuyahoga | G 3 | Cleveland | 472 | 309,970 | 439,120 |
| Darke | A 5 | Greenville | 604 | 42,961 | 42,532 |
| Defiance | A 3 | Defiance | 412 | 25,769 | 26,387 |
| Delaware | D 5 | Delaware | 431 | 27,189 | 26,401 |
| Erie | E 3 | Sandusky | 312 | 35,462 | 37,650 |
| Fairfield | E 6 | Lancaster | 493 | 33,939 | 34,259 |
| Fayette | C 6 | Washington C. H. | 444 | 22,309 | 21,725 |
| Franklin | D 5 | Columbus | 479 | 124,087 | 164,460 |
| Fulton | B 2 | Wauseon | 419 | 22,023 | 22,801 |
| Gallia | F 8 | Gallipolis | 408 | 27,005 | 27,918 |
| Geauga | H 2 | Chardon | 412 | 13,489 | 14,744 |
| Greene | C 6 | Xenia | 453 | 29,820 | 31,613 |
| Guernsey | G 5 | Cambridge | 484 | 28,645 | 34,425 |
| Hamilton | A 7 | Cincinnati | 405 | 374,573 | 409,479 |
| Hancock | C 3 | Findlay | 526 | 42,563 | 41,993 |
| Hardin | C 4 | Kenton | 461 | 28,939 | 31,187 |
| Harrison | H 5 | Cadiz | 370 | 20,830 | 20,486 |
| Henry | B 3 | Napoleon | 415 | 25,080 | 27,282 |
| Highland | C 7 | Hillsboro | 558 | 29,048 | 30,982 |
| Hocking | E 6 | Logan | 425 | 22,658 | 24,398 |
| Holmes | F 4 | Millersburg | 439 | 21,139 | 19,511 |
| Huron | E 3 | Norwalk | 516 | 31,949 | 32,330 |
| Jackson | E 7 | Jackson | 411 | 28,408 | 34,248 |
| Jefferson | J 5 | Steubenville | 390 | 39,415 | 44,357 |
| Knox | F 5 | Mount Vernon | 514 | 27,600 | 27,768 |
| Lake | H 2 | Painesville | 242 | 18,235 | 21,680 |
| Lawrence | E 8 | Ironton | 469 | 39,556 | 39,534 |
| Licking | F 5 | Newark | 665 | 43,279 | 47,070 |
| Logan | C 5 | Bellefontaine | 470 | 27,386 | 30,420 |
| Lorain | F 3 | Elyria | 494 | 40,295 | 54,857 |
| Lucas | C 2 | Toledo | 356 | 102,296 | 153,559 |
| Madison | D 6 | London | 451 | 20,057 | 20,590 |
| Mahoning | J 3 | Youngstown | 413 | 55,979 | 70,134 |
| Marion | D 4 | Marion | 502 | 24,727 | 28,678 |
| Medina | F 3 | Medina | 423 | 21,742 | 21,958 |
| Meigs | F 7 | Pomeroy | 435 | 29,813 | 28,620 |
| Mercer | A 4 | Celina | 466 | 27,220 | 28,021 |
| Miami | B 5 | Troy | 417 | 39,754 | 43,105 |
| Monroe | H 6 | Woodsfield | 431 | 25,175 | 27,031 |
| Montgomery | B 6 | Dayton | 489 | 100,852 | 130,146 |
| Morgan | G 6 | McConnellsville | 396 | 19,143 | 17,905 |
| Morrow | E 4 | Mount Gilead | 395 | 18,120 | 17,879 |
| Muskingum | F 6 | Zanesville | 655 | 51,210 | 53,185 |
| Noble | G 6 | Caldwell | 369 | 20,753 | 19,466 |
| Ottawa | D 3 | Port Clinton | 292 | 21,974 | 22,213 |
| Paulding | A 3 | Paulding | 415 | 25,932 | 27,528 |
| Perry | F 6 | New Lexington | 413 | 31,151 | 31,841 |
| Pickaway | D 6 | Circleville | 474 | 26,959 | 27,016 |
| Pike | D 7 | Waverly | 411 | 17,482 | 18,172 |
| Portage | H 3 | Ravenna | 509 | 27,868 | 29,246 |
| Preble | A 6 | Eaton | 432 | 23,421 | 23,713 |
| Putnam | B 4 | Ottawa | 475 | 30,188 | 32,525 |
| Richland | E 4 | Mansflield | 514 | 38,072 | 44,289 |
| Ross | D 7 | Chillicothe | 646 | 39,454 | 40,940 |
| Sandusky | D 3 | Fremont | 429 | 30,617 | 34,311 |
| Scioto | D 8 | Portsmouth | 565 | 35,377 | 40,981 |
| Seneca | D 3 | Tiffin | 556 | 40,869 | 41,163 |
| Shelby | B 5 | Sidney | 401 | 24,707 | 24,625 |
| Stark | H 4 | Canton | 546 | 84,170 | 94,747 |
| Summit | G 3 | Akron | 394 | 54,089 | 71,715 |
| Trumbull | J 3 | Warren | 624 | 42,373 | 46,591 |
| Tuscarawas | H 5 | New Philadelphia | 533 | 46,618 | 53,751 |
| Union | D 5 | Marysville | 430 | 22,860 | 22,342 |
| Van Wert | A 4 | Vanwert | 411 | 29,671 | 30,394 |
| Vinton | E 7 | McArthur | 414 | 16,045 | 15,330 |
| Warren | B 7 | Lebanon | 439 | 25,468 | 25,584 |
| Washington | H 7 | Marietta | 627 | 42,380 | 48,245 |
| Wayne | G 4 | Wooster | 544 | 39,005 | 37,870 |
| Williams | A 2 | Bryan | 432 | 24,897 | 24,953 |
| Wood | C 3 | Bowling Green | 626 | 44,392 | 51,555 |
| Wyandot | D 4 | Upper Sandusky | 403 | 21,722 | 21,125 |
