(Links below lead to Quick Facts for Wisconsin Counties: People, Business & Geography at U.S. Census Bureau.)
| Area | 7/1/2009 | 7/1/2008 | 7/1/2007 | 7/1/2006 | 7/1/2005 | 7/1/2004 | 7/1/2003 | 7/1/2002 | 7/1/2001 | 7/1/2000 | Census 2000 |
| Wisconsin | 5,654,774 | 5,627,610 | 5,601,571 | 5,571,680 | 5,541,443 | 5,511,385 | 5,476,796 | 5,446,766 | 5,408,769 | 5,374,254 | 5,363,675 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Adams County | 20,088 | 20,284 | 20,429 | 20,544 | 20,649 | 20,307 | 20,287 | 20,345 | 20,203 | 20,000 | 18,643 |
| Ashland County | 16,181 | 16,217 | 16,243 | 16,447 | 16,445 | 16,584 | 16,682 | 16,793 | 16,812 | 16,854 | 16,866 |
| Barron County | 45,591 | 45,656 | 45,570 | 45,678 | 45,564 | 45,607 | 45,445 | 45,442 | 45,198 | 45,026 | 44,963 |
| Bayfield County | 14,789 | 14,910 | 15,021 | 14,978 | 14,980 | 15,020 | 15,053 | 15,063 | 15,048 | 15,032 | 15,013 |
| Brown County | 247,319 | 244,687 | 243,170 | 240,437 | 238,791 | 236,880 | 234,017 | 232,059 | 229,518 | 227,338 | 226,778 |
| Buffalo County | 13,425 | 13,591 | 13,745 | 13,786 | 13,866 | 13,710 | 13,751 | 13,742 | 13,844 | 13,807 | 13,804 |
| Burnett County | 15,884 | 15,965 | 16,181 | 16,230 | 16,296 | 16,309 | 16,168 | 15,990 | 15,848 | 15,714 | 15,674 |
| Calumet County | 44,739 | 44,667 | 44,284 | 44,280 | 44,067 | 43,759 | 43,363 | 42,544 | 41,465 | 40,728 | 40,631 |
| Chippewa County | 60,609 | 60,286 | 59,958 | 59,366 | 59,139 | 58,316 | 56,743 | 56,083 | 55,676 | 55,324 | 55,195 |
| Clark County | 33,426 | 33,496 | 33,418 | 33,526 | 33,597 | 33,656 | 33,619 | 33,566 | 33,614 | 33,629 | 33,557 |
| Columbia County | 55,170 | 55,139 | 55,064 | 54,822 | 54,550 | 54,351 | 53,640 | 53,140 | 52,980 | 52,617 | 52,468 |
| Crawford County | 16,731 | 16,794 | 16,896 | 16,932 | 16,874 | 16,972 | 16,865 | 16,980 | 17,021 | 17,246 | 17,243 |
| Dane County | 491,357 | 483,298 | 476,261 | 468,750 | 462,237 | 456,058 | 449,644 | 443,430 | 435,880 | 428,626 | 426,526 |
| Dodge County | 87,335 | 87,843 | 87,735 | 87,849 | 87,224 | 87,377 | 86,879 | 86,641 | 86,290 | 86,015 | 85,897 |
| Door County | 27,815 | 27,854 | 27,783 | 28,026 | 28,027 | 28,118 | 28,246 | 28,212 | 28,142 | 28,027 | 27,961 |
| Douglas County | 44,274 | 43,936 | 43,779 | 43,870 | 43,909 | 43,877 | 43,817 | 43,630 | 43,535 | 43,379 | 43,287 |
| Dunn County | 42,968 | 42,714 | 42,556 | 42,304 | 41,540 | 41,329 | 40,947 | 40,785 | 40,530 | 39,952 | 39,858 |
| Eau Claire County | 99,409 | 98,209 | 97,429 | 96,527 | 95,535 | 95,052 | 94,958 | 94,778 | 94,027 | 93,365 | 93,142 |
| Florence County | 4,554 | 4,620 | 4,734 | 4,834 | 4,860 | 4,931 | 4,995 | 5,102 | 5,052 | 5,088 | 5,088 |
| Fond du Lac County | 100,070 | 99,864 | 99,376 | 98,910 | 98,458 | 98,281 | 98,009 | 97,821 | 97,753 | 97,384 | 97,296 |
| Forest County | 9,605 | 9,752 | 9,751 | 9,826 | 9,888 | 9,988 | 9,901 | 9,878 | 9,900 | 10,040 | 10,024 |
| Grant County | 48,965 | 49,097 | 48,996 | 48,680 | 49,108 | 49,224 | 49,223 | 49,197 | 49,500 | 49,534 | 49,597 |
| Green County | 36,110 | 36,045 | 35,757 | 35,431 | 34,812 | 34,494 | 34,067 | 34,031 | 33,836 | 33,724 | 33,647 |
| Green Lake County | 18,472 | 18,541 | 18,645 | 18,753 | 18,820 | 18,936 | 19,019 | 19,128 | 19,138 | 19,075 | 19,105 |
| Iowa County | 23,498 | 23,628 | 23,562 | 23,521 | 23,358 | 23,158 | 23,135 | 23,000 | 22,917 | 22,801 | 22,780 |
| Iron County | 6,078 | 6,204 | 6,264 | 6,312 | 6,477 | 6,570 | 6,648 | 6,743 | 6,796 | 6,845 | 6,861 |
| Jackson County | 19,886 | 19,885 | 19,822 | 19,672 | 19,608 | 19,425 | 19,487 | 19,283 | 19,290 | 19,132 | 19,100 |
| Jefferson County | 80,833 | 80,580 | 80,006 | 79,270 | 78,650 | 77,972 | 77,092 | 76,678 | 76,338 | 75,928 | 74,021 |
| Juneau County | 26,451 | 26,592 | 26,535 | 26,484 | 26,403 | 25,193 | 25,007 | 24,918 | 24,506 | 24,358 | 24,316 |
| Kenosha County | 165,382 | 164,345 | 162,885 | 161,286 | 159,800 | 157,802 | 155,813 | 153,904 | 151,987 | 150,092 | 149,577 |
| Kewaunee County | 20,315 | 20,319 | 20,402 | 20,508 | 20,448 | 20,405 | 20,265 | 20,349 | 20,249 | 20,198 | 20,187 |
| La Crosse County | 113,679 | 112,419 | 111,488 | 110,248 | 109,620 | 109,137 | 108,852 | 108,368 | 107,716 | 107,285 | 107,120 |
| Lafayette County | 15,737 | 15,808 | 15,800 | 16,018 | 16,051 | 16,088 | 16,100 | 16,136 | 16,108 | 16,127 | 16,137 |
| Langlade County | 20,008 | 20,169 | 20,303 | 20,375 | 20,419 | 20,652 | 20,641 | 20,721 | 20,820 | 20,733 | 20,740 |
| Lincoln County | 29,404 | 29,521 | 29,632 | 29,729 | 29,873 | 29,891 | 29,782 | 29,785 | 29,643 | 29,701 | 29,641 |
| Manitowoc County | 80,583 | 80,670 | 80,829 | 80,908 | 81,018 | 81,222 | 81,539 | 82,049 | 82,641 | 82,923 | 82,887 |
| Marathon County | 131,612 | 131,043 | 129,993 | 128,834 | 127,532 | 126,710 | 126,400 | 126,299 | 126,127 | 125,905 | 125,834 |
| Marinette County | 41,968 | 42,153 | 42,296 | 42,474 | 42,940 | 42,747 | 43,023 | 43,198 | 43,213 | 43,437 | 43,384 |
| Marquette County | 14,727 | 14,882 | 14,858 | 14,957 | 14,994 | 14,849 | 14,702 | 14,661 | 14,561 | 14,611 | 15,832 |
| Menominee County | 4,513 | 4,527 | 4,560 | 4,542 | 4,550 | 4,569 | 4,605 | 4,627 | 4,579 | 4,582 | 4,562 |
| Milwaukee County | 959,521 | 953,973 | 952,185 | 952,374 | 951,265 | 952,274 | 951,073 | 948,363 | 944,143 | 939,734 | 940,164 |
| Monroe County | 43,760 | 43,432 | 43,084 | 42,639 | 42,166 | 41,867 | 41,432 | 41,429 | 41,171 | 41,001 | 40,899 |
| Oconto County | 37,149 | 37,316 | 37,342 | 37,357 | 37,224 | 37,090 | 36,690 | 36,339 | 36,091 | 35,801 | 35,634 |
| Oneida County | 35,930 | 36,124 | 36,195 | 36,415 | 36,623 | 36,811 | 37,069 | 36,811 | 36,895 | 36,811 | 36,776 |
| Outagamie County | 177,155 | 175,113 | 173,723 | 172,004 | 170,038 | 168,408 | 166,882 | 165,593 | 163,875 | 161,780 | 160,971 |
| Ozaukee County | 86,311 | 85,821 | 85,421 | 85,189 | 85,028 | 84,937 | 84,195 | 83,577 | 82,985 | 82,531 | 82,317 |
| Pepin County | 7,293 | 7,359 | 7,377 | 7,371 | 7,407 | 7,395 | 7,325 | 7,319 | 7,242 | 7,199 | 7,213 |
| Pierce County | 40,081 | 40,196 | 39,770 | 39,504 | 38,987 | 38,540 | 37,925 | 37,474 | 37,210 | 36,918 | 36,804 |
| Polk County | 44,252 | 44,187 | 44,174 | 44,229 | 43,892 | 43,490 | 42,953 | 42,532 | 42,193 | 41,446 | 41,319 |
| Portage County | 69,176 | 68,977 | 68,534 | 67,917 | 67,566 | 67,402 | 67,436 | 67,485 | 67,341 | 67,252 | 67,182 |
| Price County | 14,214 | 14,345 | 14,479 | 14,805 | 14,977 | 15,138 | 15,321 | 15,388 | 15,553 | 15,809 | 15,822 |
| Racine County | 200,601 | 200,109 | 199,603 | 198,398 | 197,025 | 194,891 | 193,119 | 191,469 | 190,000 | 188,991 | 188,831 |
| Richland County | 17,848 | 17,951 | 18,178 | 17,996 | 17,984 | 18,093 | 17,911 | 17,829 | 17,942 | 17,976 | 17,924 |
| Rock County | 160,155 | 160,186 | 159,449 | 158,042 | 156,315 | 155,320 | 153,952 | 153,509 | 153,151 | 152,499 | 152,307 |
| Rusk County | 14,367 | 14,398 | 14,421 | 14,493 | 14,683 | 14,818 | 14,846 | 15,129 | 15,173 | 15,349 | 15,347 |
| Sauk County | 58,922 | 58,830 | 58,327 | 57,761 | 57,356 | 56,848 | 56,222 | 55,767 | 55,394 | 55,339 | 55,225 |
| Sawyer County | 16,939 | 16,972 | 16,952 | 16,849 | 16,835 | 16,705 | 16,618 | 16,462 | 16,288 | 16,242 | 16,196 |
| Shawano County | 41,166 | 41,123 | 41,115 | 41,013 | 40,913 | 40,861 | 40,747 | 40,789 | 40,762 | 40,766 | 40,664 |
| Sheboygan County | 114,560 | 114,458 | 114,113 | 113,830 | 113,650 | 113,223 | 112,956 | 112,964 | 112,878 | 112,742 | 112,646 |
| St. Croix County | 83,351 | 82,487 | 81,104 | 79,219 | 76,590 | 73,635 | 70,814 | 68,121 | 65,646 | 63,643 | 63,155 |
| Taylor County | 19,222 | 19,245 | 19,313 | 19,369 | 19,473 | 19,500 | 19,419 | 19,587 | 19,625 | 19,720 | 19,680 |
| Trempealeau County | 27,754 | 27,684 | 27,710 | 27,673 | 27,553 | 27,271 | 27,110 | 27,057 | 27,027 | 27,078 | 27,010 |
| Vernon County | 29,324 | 29,072 | 28,991 | 28,835 | 28,719 | 28,463 | 28,256 | 28,208 | 28,130 | 28,065 | 28,056 |
| Vilas County | 21,496 | 21,696 | 21,960 | 22,012 | 22,067 | 22,031 | 21,963 | 21,739 | 21,449 | 21,139 | 21,033 |
| Walworth County | 100,593 | 100,538 | 100,239 | 99,973 | 99,000 | 97,496 | 96,637 | 95,154 | 93,423 | 92,431 | 93,759 |
| Washburn County | 16,666 | 16,615 | 16,576 | 16,565 | 16,490 | 16,458 | 16,397 | 16,374 | 16,198 | 16,086 | 16,036 |
| Washington County | 130,681 | 129,722 | 128,192 | 126,597 | 125,038 | 123,518 | 121,725 | 120,537 | 119,313 | 117,945 | 117,493 |
| Waukesha County | 383,154 | 380,935 | 379,020 | 376,141 | 374,989 | 373,203 | 371,424 | 368,625 | 364,858 | 362,095 | 360,767 |
| Waupaca County | 51,665 | 51,863 | 52,032 | 52,018 | 51,991 | 52,187 | 52,242 | 52,176 | 51,984 | 51,949 | 51,731 |
| Waushara County | 24,606 | 24,733 | 24,679 | 24,691 | 24,590 | 24,581 | 24,509 | 24,318 | 23,373 | 23,105 | 23,154 |
| Winnebago County | 163,370 | 162,099 | 161,470 | 160,456 | 159,536 | 158,614 | 158,294 | 158,431 | 157,799 | 157,082 | 156,763 |
| Wood County | 73,932 | 73,841 | 73,827 | 74,021 | 74,496 | 74,791 | 74,905 | 75,112 | 75,356 | 75,548 | 75,555 |
Source: Population Division, U.S. Census Bureau