| Annual Estimates of the Population for Counties of Ohio: April 1, 2000 to July 1, 2006 | |||||||||
| Geographic Area | Population Estimates | April 1, 2000 | |||||||
| July 1, 2006 | July 1, 2005 | July 1, 2004 | July 1, 2003 | July 1, 2002 | July 1, 2001 | July 1, 2000 | Estimates Base | Census | |
| Ohio | 11,478,006 | 11,470,685 | 11,461,347 | 11,437,908 | 11,414,537 | 11,392,043 | 11,364,401 | 11,353,145 | 11,353,140 |
| Adams County | 28,516 | 28,454 | 28,278 | 28,078 | 27,746 | 27,509 | 27,340 | 27,330 | 27,330 |
| Allen County | 105,788 | 106,051 | 106,195 | 106,932 | 108,040 | 108,175 | 108,557 | 108,473 | 108,473 |
| Ashland County | 54,727 | 54,184 | 53,848 | 53,627 | 53,160 | 52,841 | 52,576 | 52,523 | 52,523 |
| Ashtabula County | 102,703 | 103,044 | 102,960 | 103,007 | 102,987 | 102,954 | 102,796 | 102,728 | 102,728 |
| Athens County | 61,860 | 62,028 | 62,185 | 63,135 | 62,933 | 62,711 | 62,312 | 62,223 | 62,223 |
| Auglaize County | 47,060 | 47,179 | 46,883 | 46,698 | 46,670 | 46,720 | 46,629 | 46,611 | 46,611 |
| Belmont County | 68,771 | 69,089 | 69,444 | 69,567 | 69,843 | 69,602 | 70,130 | 70,226 | 70,226 |
| Brown County | 44,423 | 44,255 | 44,106 | 43,832 | 43,410 | 42,832 | 42,585 | 42,285 | 42,285 |
| Butler County | 354,992 | 349,966 | 345,755 | 342,275 | 339,364 | 336,790 | 333,641 | 332,598 | 332,807 |
| Carroll County | 29,189 | 29,252 | 29,448 | 29,473 | 29,280 | 29,022 | 28,886 | 28,836 | 28,836 |
| Champaign County | 39,921 | 39,692 | 39,540 | 39,436 | 39,282 | 39,025 | 38,946 | 38,890 | 38,890 |
| Clark County | 141,872 | 141,908 | 142,230 | 142,473 | 143,709 | 144,054 | 144,652 | 144,741 | 144,742 |
| Clermont County | 192,706 | 190,329 | 188,025 | 185,030 | 182,728 | 180,409 | 178,155 | 177,450 | 177,977 |
| Clinton County | 43,399 | 42,561 | 42,177 | 41,732 | 41,362 | 40,995 | 40,670 | 40,520 | 40,543 |
| Columbiana County | 110,542 | 110,636 | 111,287 | 111,460 | 111,557 | 111,680 | 112,129 | 112,075 | 112,075 |
| Coshocton County | 36,976 | 36,969 | 37,070 | 37,028 | 36,969 | 36,871 | 36,707 | 36,655 | 36,655 |
| Crawford County | 45,047 | 45,616 | 45,879 | 45,988 | 46,350 | 46,622 | 46,903 | 46,966 | 46,966 |
| Cuyahoga County | 1,314,241 | 1,330,428 | 1,346,194 | 1,359,187 | 1,371,563 | 1,382,578 | 1,392,172 | 1,393,845 | 1,393,978 |
| Darke County | 52,780 | 52,967 | 53,074 | 52,996 | 52,929 | 53,077 | 53,319 | 53,309 | 53,309 |
| Defiance County | 39,091 | 38,934 | 39,015 | 39,056 | 39,233 | 39,398 | 39,457 | 39,500 | 39,500 |
| Delaware County | 156,697 | 150,496 | 142,849 | 135,538 | 127,515 | 119,265 | 111,739 | 109,989 | 109,989 |
| Erie County | 78,116 | 78,374 | 78,830 | 78,753 | 78,851 | 79,377 | 79,605 | 79,551 | 79,551 |
| Fairfield County | 140,591 | 138,403 | 135,857 | 132,578 | 129,241 | 126,238 | 123,453 | 122,881 | 122,759 |
| Fayette County | 28,305 | 28,193 | 28,044 | 28,134 | 28,174 | 28,218 | 28,441 | 28,433 | 28,433 |
| Franklin County | 1,095,662 | 1,089,365 | 1,086,152 | 1,084,994 | 1,081,840 | 1,078,837 | 1,071,663 | 1,068,869 | 1,068,978 |
| Fulton County | 42,900 | 42,888 | 42,785 | 42,371 | 42,279 | 42,150 | 42,145 | 42,084 | 42,084 |
| Gallia County | 31,313 | 31,241 | 31,232 | 31,240 | 31,268 | 31,172 | 31,092 | 31,069 | 31,069 |
| Geauga County | 95,676 | 95,060 | 94,379 | 93,963 | 92,613 | 91,765 | 91,259 | 90,895 | 90,895 |
| Greene County | 152,298 | 151,823 | 151,892 | 150,687 | 149,751 | 148,625 | 148,178 | 147,886 | 147,886 |
| Guernsey County | 40,876 | 41,007 | 41,185 | 41,262 | 41,123 | 40,927 | 40,798 | 40,792 | 40,792 |
| Hamilton County | 822,596 | 828,487 | 832,250 | 836,547 | 840,362 | 844,569 | 843,993 | 845,273 | 845,303 |
| Hancock County | 73,824 | 73,508 | 73,470 | 73,089 | 72,657 | 72,013 | 71,322 | 71,295 | 71,295 |
| Hardin County | 31,966 | 32,015 | 32,113 | 31,592 | 31,748 | 31,711 | 31,947 | 31,945 | 31,945 |
| Harrison County | 15,799 | 15,881 | 15,873 | 15,979 | 15,880 | 15,790 | 15,864 | 15,856 | 15,856 |
| Henry County | 29,520 | 29,431 | 29,364 | 29,351 | 29,410 | 29,206 | 29,218 | 29,210 | 29,210 |
| Highland County | 42,833 | 42,528 | 42,560 | 42,056 | 41,777 | 41,285 | 41,032 | 40,875 | 40,875 |
| Hocking County | 28,973 | 28,927 | 28,864 | 28,691 | 28,560 | 28,367 | 28,251 | 28,241 | 28,241 |
| Holmes County | 41,574 | 41,424 | 41,165 | 40,680 | 40,366 | 39,806 | 39,062 | 38,943 | 38,943 |
| Huron County | 60,313 | 60,291 | 60,129 | 60,075 | 59,942 | 59,561 | 59,617 | 59,487 | 59,487 |
| Jackson County | 33,543 | 33,576 | 33,302 | 33,080 | 32,984 | 32,714 | 32,643 | 32,641 | 32,641 |
| Jefferson County | 70,125 | 70,631 | 71,277 | 71,744 | 72,195 | 72,971 | 73,687 | 73,894 | 73,894 |
| Knox County | 58,561 | 58,207 | 57,676 | 57,010 | 56,267 | 55,448 | 54,658 | 54,503 | 54,500 |
| Lake County | 232,892 | 232,416 | 232,059 | 230,904 | 230,357 | 229,173 | 227,685 | 227,511 | 227,511 |
| Lawrence County | 63,179 | 62,946 | 62,573 | 62,441 | 62,052 | 62,107 | 62,292 | 62,319 | 62,319 |
| Licking County | 156,287 | 154,683 | 152,699 | 150,639 | 148,662 | 147,420 | 146,091 | 145,625 | 145,491 |
| Logan County | 46,189 | 46,392 | 46,505 | 46,419 | 46,302 | 46,029 | 46,023 | 46,005 | 46,005 |
| Lorain County | 301,993 | 300,266 | 296,717 | 293,908 | 289,724 | 287,057 | 285,234 | 284,664 | 284,664 |
| Lucas County | 445,281 | 447,410 | 449,588 | 452,343 | 453,499 | 454,480 | 454,866 | 455,054 | 455,054 |
| Madison County | 41,496 | 41,220 | 40,927 | 40,661 | 40,384 | 40,219 | 40,226 | 40,213 | 40,213 |
| Mahoning County | 251,026 | 253,181 | 255,538 | 251,027 | 252,531 | 255,044 | 257,074 | 257,555 | 257,555 |
| Marion County | 65,583 | 65,834 | 66,031 | 66,254 | 66,131 | 66,175 | 66,150 | 66,209 | 66,217 |
| Medina County | 169,353 | 166,968 | 164,644 | 161,507 | 158,351 | 154,795 | 151,888 | 151,095 | 151,095 |
| Meigs County | 23,092 | 23,179 | 23,170 | 23,236 | 23,167 | 23,034 | 23,042 | 23,072 | 23,072 |
| Mercer County | 41,303 | 41,150 | 41,037 | 40,971 | 40,913 | 40,835 | 40,922 | 40,924 | 40,924 |
| Miami County | 101,914 | 101,414 | 100,670 | 100,052 | 99,599 | 99,271 | 99,001 | 98,868 | 98,868 |
| Monroe County | 14,606 | 14,736 | 14,927 | 14,950 | 14,978 | 15,145 | 15,181 | 15,180 | 15,180 |
| Montgomery County | 542,237 | 545,603 | 548,561 | 550,876 | 552,567 | 555,215 | 558,507 | 559,062 | 559,062 |
| Morgan County | 14,821 | 14,895 | 14,932 | 14,844 | 14,828 | 14,893 | 14,889 | 14,897 | 14,897 |
| Morrow County | 34,529 | 34,309 | 34,080 | 33,537 | 32,950 | 32,534 | 31,811 | 31,628 | 31,628 |
| Muskingum County | 86,125 | 85,606 | 85,419 | 85,237 | 85,183 | 84,784 | 84,739 | 84,585 | 84,585 |
| Noble County | 14,165 | 14,097 | 14,172 | 14,072 | 13,993 | 13,957 | 14,102 | 14,058 | 14,058 |
| Ottawa County | 41,331 | 41,430 | 41,436 | 41,226 | 41,037 | 40,979 | 41,008 | 40,985 | 40,985 |
| Paulding County | 19,432 | 19,483 | 19,514 | 19,689 | 19,899 | 20,114 | 20,233 | 20,293 | 20,293 |
| Perry County | 35,313 | 35,106 | 35,033 | 34,869 | 34,571 | 34,323 | 34,128 | 34,074 | 34,078 |
| Pickaway County | 53,606 | 52,837 | 52,010 | 51,845 | 51,674 | 52,412 | 52,851 | 52,727 | 52,727 |
| Pike County | 28,269 | 28,058 | 28,265 | 28,185 | 28,007 | 27,819 | 27,758 | 27,695 | 27,695 |
| Portage County | 155,012 | 155,150 | 155,079 | 154,659 | 153,627 | 153,082 | 152,382 | 152,061 | 152,061 |
| Preble County | 42,491 | 42,400 | 42,423 | 42,523 | 42,532 | 42,432 | 42,370 | 42,341 | 42,337 |
| Putnam County | 34,744 | 34,807 | 34,712 | 34,778 | 34,686 | 34,781 | 34,765 | 34,726 | 34,726 |
| Richland County | 127,010 | 127,585 | 127,891 | 128,055 | 128,269 | 127,998 | 128,809 | 128,852 | 128,852 |
| Ross County | 75,556 | 75,135 | 74,749 | 74,656 | 74,153 | 73,763 | 73,449 | 73,345 | 73,345 |
| Sandusky County | 61,625 | 61,579 | 61,689 | 61,654 | 61,836 | 61,805 | 61,820 | 61,796 | 61,792 |
| Scioto County | 76,441 | 76,506 | 76,579 | 77,359 | 78,043 | 78,516 | 79,087 | 79,195 | 79,195 |
| Seneca County | 57,255 | 57,373 | 57,724 | 57,887 | 57,981 | 58,363 | 58,628 | 58,683 | 58,683 |
| Shelby County | 48,884 | 48,690 | 48,474 | 48,516 | 48,379 | 48,319 | 48,002 | 47,910 | 47,910 |
| Stark County | 380,575 | 380,275 | 380,421 | 380,076 | 379,402 | 378,699 | 378,191 | 378,132 | 378,098 |
| Summit County | 545,931 | 546,285 | 546,366 | 546,298 | 546,149 | 545,419 | 543,604 | 542,899 | 542,899 |
| Trumbull County | 217,362 | 218,672 | 220,184 | 221,370 | 222,939 | 224,281 | 224,992 | 225,116 | 225,116 |
| Tuscarawas County | 91,766 | 91,791 | 91,956 | 91,673 | 91,590 | 91,234 | 91,050 | 90,914 | 90,914 |
| Union County | 46,702 | 45,600 | 44,689 | 43,734 | 42,950 | 42,470 | 41,207 | 40,909 | 40,909 |
| Van Wert County | 29,303 | 29,213 | 29,264 | 29,267 | 29,332 | 29,448 | 29,641 | 29,659 | 29,659 |
| Vinton County | 13,519 | 13,384 | 13,310 | 13,230 | 13,111 | 13,013 | 12,815 | 12,806 | 12,806 |
| Warren County | 201,871 | 196,793 | 189,823 | 182,545 | 175,294 | 167,918 | 161,470 | 159,169 | 158,383 |
| Washington County | 61,867 | 62,155 | 62,582 | 62,552 | 62,503 | 62,785 | 63,187 | 63,251 | 63,251 |
| Wayne County | 113,950 | 113,496 | 113,086 | 113,052 | 112,793 | 112,230 | 111,678 | 111,530 | 111,564 |
| Williams County | 38,719 | 38,679 | 38,796 | 38,810 | 38,981 | 39,113 | 39,207 | 39,188 | 39,188 |
| Wood County | 124,183 | 123,889 | 123,377 | 122,340 | 121,940 | 121,935 | 121,203 | 121,061 | 121,065 |
| Wyandot County | 22,553 | 22,711 | 22,825 | 22,758 | 22,770 | 22,745 | 22,914 | 22,908 | 22,908 |
Source: Population Division, U.S. Census Bureau