COUNTY 2000 Est 07/2005 Est 07/2010 No. change 2000-2010 % change 2000-2010
Delaware County 109989 149453 172519 62530 56.85%
Warren County 158383 195306 213335 54952 34.70%
Union County 40909 45384 49165 8256 20.18%
Fairfield County 122759 137630 144446 21687 17.67%
Medina County 151095 165657 174326 23231 15.38%
Clermont County 177977 188350 195766 17789 10.00%
Knox County 54500 58004 59851 5351 9.82%
Licking County 145491 153939 159072 13581 9.33%
Butler County 332807 347732 363230 30423 9.14%
Morrow County 31628 34071 34468 2840 8.98%
Geauga County 90895 96970 98969 8074 8.88%
Franklin County 1068978 1101230 1159947 90969 8.51%
Greene County 147886 155942 159384 11498 7.77%
Holmes County 38943 41252 41748 2805 7.20%
Lorain County 284664 298672 305097 20433 7.18%
Madison County 40213 40779 42594 2381 5.92%
Clinton County 40543 41990 42459 1916 4.73%
Ashland County 52523 53987 54961 2438 4.64%
Hancock County 71295 73315 74316 3021 4.24%
Pickaway County 52727 52423 54864 2137 4.05%
Ross County 73345 74902 76283 2938 4.01%
Brown County 42285 43652 43959 1674 3.96%
Lake County 227511 232158 235623 8112 3.57%
Portage County 152061 155136 157220 5159 3.39%
Wood County 121065 124650 125141 4076 3.37%
Perry County 34078 34781 35212 1134 3.33%
Vinton County 12806 13265 13219 413 3.23%
Jackson County 32641 33333 33549 908 2.78%
Highland County 40875 42087 41977 1102 2.70%
Shelby County 47910 48910 49161 1251 2.61%
Wayne County 111564 113348 114187 2623 2.35%
Adams County 27330 28159 27929 599 2.19%
Miami County 98868 100723 101008 2140 2.16%
Hocking County 28241 28737 28837 596 2.11%
Noble County 14058 13994 14280 222 1.58%
Athens County 62223 63145 63201 978 1.57%
Lucas County 455054 464560 461792 6738 1.48%
Champaign County 38890 39167 39356 466 1.20%
Hamilton County 845303 847141 855340 10037 1.19%
Logan County 46005 46311 46362 357 0.78%
Muskingum County 84585 85179 85182 597 0.71%
Fulton County 42084 42616 42227 143 0.34%
Lawrence County 62319 62476 62510 191 0.31%
Huron County 59487 60089 59656 169 0.28%
Tuscarawas County 90914 91394 91035 121 0.13%
Stark County 378098 378765 377793 -305 -0.08%
Pike County 27695 27718 27640 -55 -0.20%
Summit County 542899 545857 541360 -1539 -0.28%
Fayette County 28433 28258 28275 -158 -0.56%
Gallia County 31069 30925 30839 -230 -0.74%
Ottawa County 40985 41290 40680 -305 -0.74%
Auglaize County 46611 46268 46218 -393 -0.84%
Mercer County 40924 40787 40517 -407 -0.99%
Hardin County 31945 31742 31604 -341 -1.07%
Marion County 66217 65765 65442 -775 -1.17%
Putnam County 34726 34659 34240 -486 -1.40%
Carroll County 28836 28881 28421 -415 -1.44%
Meigs County 23072 23009 22739 -333 -1.44%
Guernsey County 40792 40640 39902 -890 -2.18%
Henry County 29210 29228 28547 -663 -2.27%
Ashtabula County 102728 102055 100321 -2407 -2.34%
Wyandot County 22908 22644 22297 -611 -2.67%
Coshocton County 36655 36686 35675 -980 -2.67%
Darke County 53309 52636 51882 -1427 -2.68%
Sandusky County 61792 61256 59822 -1970 -3.19%
Preble County 42337 41895 40969 -1368 -3.23%
Defiance County 39500 38570 38193 -1307 -3.31%
Erie County 79551 77875 76872 -2679 -3.37%
Scioto County 79195 76223 76429 -2766 -3.49%
Belmont County 70226 68720 67723 -2503 -3.56%
Harrison County 15856 15576 15263 -593 -3.74%
Columbiana County 112075 109533 107578 -4497 -4.01%
Washington County 63251 61952 60688 -2563 -4.05%
Clark County 144742 141607 138800 -5942 -4.11%
Allen County 108473 105581 103842 -4631 -4.27%
Richland County 128852 127078 123224 -5628 -4.37%
Van Wert County 29659 29045 28336 -1323 -4.46%
Morgan County 14897 14759 14212 -685 -4.60%
Seneca County 58683 57249 55969 -2714 -4.62%
Williams County 39188 38413 37362 -1826 -4.66%
Montgomery County 559062 544789 532181 -26881 -4.81%
Paulding County 20293 19379 18845 -1448 -7.14%
Trumbull County 225116 216700 208119 -16997 -7.55%
Crawford County 46966 45104 43014 -3952 -8.41%
Jefferson County 73894 70114 67651 -6243 -8.45%
Monroe County 15180 14533 13877 -1303 -8.58%
Cuyahoga County 1393978 1324376 1269455 -124523 -8.93%
Mahoning County 257555 245420 234532 -23023 -8.94%
Ohio 11353140 11475559 11532111 178971 1.58%