Fastest growing counties in Ohio.
County | Rank | Change (2020) | 2024 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Union County | 1 | 14.76% | 72,398 | 63,085 |
| Delaware County | 2 | 10.03% | 236,746 | 215,166 |
| Pickaway County | 3 | 5.98% | 62,165 | 58,656 |
| Fairfield County | 4 | 5.22% | 167,764 | 159,448 |
| Warren County | 5 | 4.66% | 254,561 | 243,228 |
| Madison County | 6 | 4.05% | 45,623 | 43,849 |
| Athens County | 7 | 3.43% | 64,531 | 62,393 |
| Licking County | 8 | 3.27% | 184,637 | 178,784 |
| Morrow County | 9 | 2.5% | 35,854 | 34,980 |
| Miami County | 10 | 2.37% | 111,539 | 108,959 |
| Clermont County | 11 | 2.16% | 213,265 | 208,750 |
| Lorain County | 12 | 2.01% | 319,789 | 313,498 |
| Coshocton County | 13 | 1.47% | 37,123 | 36,584 |
| Noble County | 14 | 1.47% | 14,297 | 14,090 |
| Butler County | 15 | 1.4% | 396,358 | 390,878 |
| Greene County | 16 | 1.32% | 170,355 | 168,131 |
| Portage County | 17 | 1.07% | 163,588 | 161,853 |
| Medina County | 18 | 1.07% | 184,595 | 182,646 |
| Wood County | 19 | 1.06% | 133,658 | 132,256 |
| Highland County | 20 | 1.02% | 43,802 | 43,359 |
| Knox County | 21 | 1.02% | 63,444 | 62,803 |
| Defiance County | 22 | 0.63% | 38,502 | 38,262 |
| Champaign County | 23 | 0.53% | 38,947 | 38,743 |
| Perry County | 24 | 0.52% | 35,631 | 35,446 |
| Adams County | 25 | 0.52% | 27,583 | 27,440 |
| Carroll County | 26 | 0.48% | 26,830 | 26,702 |
| Franklin County | 27 | 0.45% | 1,330,396 | 1,324,441 |
| Brown County | 28 | 0.41% | 43,854 | 43,673 |
| Holmes County | 29 | 0.38% | 44,397 | 44,227 |
| Muskingum County | 30 | 0.03% | 86,496 | 86,468 |
| Sandusky County | 31 | -0.01% | 58,851 | 58,856 |
| Geauga County | 32 | -0.07% | 95,323 | 95,387 |
| Richland County | 33 | -0.08% | 124,867 | 124,966 |
| Clinton County | 34 | -0.1% | 41,986 | 42,028 |
| Hamilton County | 35 | -0.12% | 829,395 | 830,377 |
| Logan County | 36 | -0.14% | 46,052 | 46,116 |
| Jackson County | 37 | -0.19% | 32,601 | 32,662 |
| Mercer County | 38 | -0.21% | 42,454 | 42,542 |
| Ashland County | 39 | -0.22% | 52,356 | 52,470 |
| Pike County | 40 | -0.3% | 26,990 | 27,072 |
| Wayne County | 41 | -0.39% | 116,468 | 116,923 |
| Hancock County | 42 | -0.39% | 74,634 | 74,928 |
| Lake County | 43 | -0.42% | 231,544 | 232,516 |
| Marion County | 44 | -0.45% | 65,093 | 65,388 |
| Stark County | 45 | -0.5% | 372,647 | 374,522 |
| Huron County | 46 | -0.54% | 58,179 | 58,495 |
| Henry County | 47 | -0.56% | 27,514 | 27,668 |
| Montgomery County | 48 | -0.56% | 534,118 | 537,119 |
| Fayette County | 49 | -0.6% | 28,802 | 28,975 |
| Shelby County | 50 | -0.62% | 47,846 | 48,146 |
| Auglaize County | 51 | -0.68% | 46,154 | 46,472 |
| Ross County | 52 | -0.72% | 76,494 | 77,049 |
| Summit County | 53 | -0.76% | 535,697 | 539,821 |
| Ashtabula County | 54 | -0.78% | 96,730 | 97,495 |
| Guernsey County | 55 | -0.79% | 38,118 | 38,423 |
| Trumbull County | 56 | -0.82% | 200,020 | 201,681 |
| Paulding County | 57 | -0.86% | 18,650 | 18,811 |
| Putnam County | 58 | -0.92% | 34,068 | 34,385 |
| Seneca County | 59 | -0.97% | 54,520 | 55,054 |
| Gallia County | 60 | -1% | 28,942 | 29,233 |
| Morgan County | 61 | -1.01% | 13,623 | 13,762 |
| Clark County | 62 | -1.03% | 134,488 | 135,887 |
| Van Wert County | 63 | -1.08% | 28,604 | 28,916 |
| Crawford County | 64 | -1.1% | 41,549 | 42,013 |
| Darke County | 65 | -1.14% | 51,304 | 51,893 |
| Preble County | 66 | -1.14% | 40,538 | 41,007 |
| Mahoning County | 67 | -1.2% | 225,270 | 228,009 |
| Hardin County | 68 | -1.24% | 30,345 | 30,727 |
| Williams County | 69 | -1.47% | 36,534 | 37,078 |
| Allen County | 70 | -1.51% | 100,579 | 102,125 |
| Tuscarawas County | 71 | -1.52% | 91,777 | 93,193 |
| Lucas County | 72 | -1.53% | 424,249 | 430,859 |
| Ottawa County | 73 | -1.63% | 39,638 | 40,296 |
| Columbiana County | 74 | -1.82% | 99,795 | 101,642 |
| Fulton County | 75 | -1.85% | 41,856 | 42,646 |
| Monroe County | 76 | -1.94% | 13,091 | 13,350 |
| Jefferson County | 77 | -2.15% | 63,779 | 65,178 |
| Washington County | 78 | -2.28% | 58,286 | 59,647 |
| Wyandot County | 79 | -2.3% | 21,362 | 21,864 |
| Erie County | 80 | -2.55% | 73,556 | 75,481 |
| Meigs County | 81 | -2.64% | 21,573 | 22,159 |
| Cuyahoga County | 82 | -2.64% | 1,229,182 | 1,262,573 |
| Hocking County | 83 | -2.77% | 27,262 | 28,040 |
| Scioto County | 84 | -2.84% | 71,749 | 73,848 |
| Belmont County | 85 | -2.94% | 64,341 | 66,292 |
| Vinton County | 86 | -3.36% | 12,371 | 12,801 |
| Harrison County | 87 | -3.62% | 13,967 | 14,491 |
| Lawrence County | 88 | -4.25% | 55,664 | 58,137 |