| County | Rank | Change (2020) ↓ | 2025 Pop. | 2020 Pop. |
|---|---|---|---|---|
| Dane County | 1 | 6.1% | 596,955 | 562,620 |
| Lafayette County | 2 | 5.72% | 17,553 | 16,604 |
| St. Croix County | 3 | 5.18% | 98,752 | 93,893 |
| Sawyer County | 4 | 5.14% | 19,051 | 18,119 |
| Forest County | 5 | 5.05% | 9,631 | 9,168 |
| Burnett County | 6 | 4.26% | 17,285 | 16,578 |
| Pepin County | 7 | 3.88% | 7,628 | 7,343 |
| Bayfield County | 8 | 3.87% | 16,867 | 16,238 |
| Vilas County | 9 | 3.83% | 23,982 | 23,097 |
| Eau Claire County | 10 | 3.52% | 109,602 | 105,877 |
| Pierce County | 11 | 3.39% | 43,659 | 42,229 |
| Oconto County | 12 | 3.21% | 40,333 | 39,077 |
| Portage County | 13 | 3.13% | 72,619 | 70,412 |
| Outagamie County | 14 | 3.13% | 196,952 | 190,973 |
| Waukesha County | 15 | 3.07% | 420,045 | 407,518 |
| Ozaukee County | 16 | 3.02% | 94,392 | 91,627 |
| Vernon County | 17 | 2.76% | 31,559 | 30,710 |
| Calumet County | 18 | 2.71% | 53,901 | 52,478 |
| Brown County | 19 | 2.52% | 275,744 | 268,966 |
| Waushara County | 20 | 2.42% | 25,144 | 24,550 |
| Adams County | 21 | 2.39% | 21,176 | 20,682 |
| Menominee County | 22 | 2.18% | 4,351 | 4,258 |
| Dunn County | 23 | 2.18% | 46,443 | 45,453 |
| Washburn County | 24 | 2.08% | 16,968 | 16,623 |
| Chippewa County | 25 | 2.04% | 67,697 | 66,346 |
| Florence County | 26 | 1.93% | 4,651 | 4,563 |
| Polk County | 27 | 1.75% | 45,817 | 45,029 |
| Ashland County | 28 | 1.71% | 16,289 | 16,015 |
| Rock County | 29 | 1.66% | 166,479 | 163,761 |
| Marinette County | 30 | 1.61% | 42,573 | 41,900 |
| Winnebago County | 31 | 1.58% | 174,509 | 171,796 |
| Sauk County | 32 | 1.57% | 66,829 | 65,793 |
| Washington County | 33 | 1.57% | 138,958 | 136,811 |
| Green Lake County | 34 | 1.56% | 19,323 | 19,027 |
| Grant County | 35 | 1.51% | 52,766 | 51,979 |
| Shawano County | 36 | 1.42% | 41,450 | 40,869 |
| Iowa County | 37 | 1.38% | 24,045 | 23,718 |
| Taylor County | 38 | 1.37% | 20,211 | 19,938 |
| Buffalo County | 39 | 1.24% | 13,488 | 13,323 |
| Door County | 40 | 1.13% | 30,458 | 30,119 |
| Green County | 41 | 1.08% | 37,432 | 37,033 |
| Kewaunee County | 42 | 1% | 20,769 | 20,563 |
| Racine County | 43 | 0.92% | 199,895 | 198,065 |
| Marathon County | 44 | 0.89% | 139,344 | 138,114 |
| Langlade County | 45 | 0.87% | 19,635 | 19,466 |
| Iron County | 46 | 0.86% | 6,193 | 6,140 |
| Oneida County | 47 | 0.75% | 38,161 | 37,877 |
| Walworth County | 48 | 0.7% | 106,050 | 105,310 |
| Monroe County | 49 | 0.54% | 46,547 | 46,299 |
| Clark County | 50 | 0.52% | 34,810 | 34,629 |
| Sheboygan County | 51 | 0.52% | 118,667 | 118,058 |
| La Crosse County | 52 | 0.38% | 121,403 | 120,943 |
| Jefferson County | 53 | 0.36% | 86,519 | 86,208 |
| Manitowoc County | 54 | 0.35% | 81,701 | 81,412 |
| Marquette County | 55 | 0.35% | 15,635 | 15,580 |
| Price County | 56 | 0.28% | 14,076 | 14,036 |
| Kenosha County | 57 | 0.26% | 169,641 | 169,202 |
| Fond du Lac County | 58 | 0.24% | 104,403 | 104,156 |
| Lincoln County | 59 | 0.22% | 28,492 | 28,429 |
| Jackson County | 60 | 0.1% | 21,116 | 21,095 |
| Barron County | 61 | -0.05% | 46,698 | 46,723 |
| Douglas County | 62 | -0.11% | 44,300 | 44,348 |
| Crawford County | 63 | -0.37% | 16,025 | 16,084 |
| Columbia County | 64 | -0.42% | 58,277 | 58,520 |
| Wood County | 65 | -0.46% | 73,849 | 74,189 |
| Trempealeau County | 66 | -0.49% | 30,663 | 30,813 |
| Juneau County | 67 | -0.59% | 26,623 | 26,780 |
| Dodge County | 68 | -0.64% | 88,769 | 89,344 |
| Rusk County | 69 | -0.68% | 14,084 | 14,181 |
| Milwaukee County | 70 | -1.17% | 927,620 | 938,609 |
| Waupaca County | 71 | -1.52% | 51,018 | 51,806 |
| Richland County | 72 | -1.67% | 16,995 | 17,283 |
Wisconsin's counties show varied growth patterns from 2020 to 2025. Dane County leads with 6.1% annualized growth, followed by Lafayette County (5.72%) and St. Croix County (5.18%). The largest counties are Milwaukee County (927,620), Dane County (596,955), and Waukesha County (420,045). Of the 72 counties in Wisconsin, 60 are growing while 12 have experienced population decline. Overall, counties averaged 1.57% annualized growth, with total population growing by 1.6% annually.
-0.05
-0.025
0
0.025
0.05
0.075