Fastest Growing Counties in Wisconsin (2025)

County
Rank
Change (2020)
2025 Pop.
2020 Pop.
Adams County15.64%21,84320,677
Dane County24.96%590,525562,615
St. Croix County34.78%98,35593,872
Vilas County44.65%24,17123,097
Bayfield County54.63%16,98916,237
Burnett County64.36%17,30016,577
Pierce County74.13%43,97442,229
Eau Claire County84%110,137105,897
Calumet County93.22%54,17352,485
Green Lake County103.15%19,61619,017
Pepin County113.08%7,5677,341
Ozaukee County122.96%94,33891,629
Sawyer County132.74%18,61418,118
Washburn County142.6%17,04816,616
Polk County152.56%46,19445,039
Lafayette County162.44%17,02316,618
Iron County172.39%6,2866,139
Waukesha County182.39%417,227407,496
Marquette County192.37%15,96015,590
Vernon County202.24%31,38430,696
Outagamie County212.2%195,164190,966
Oconto County222.19%39,93339,077
Portage County231.99%71,80470,405
Brown County241.92%274,115268,951
Taylor County251.81%20,29219,932
Waushara County261.62%24,94824,550
Chippewa County271.6%67,40466,341
Washington County281.6%138,992136,801
Door County291.55%30,58430,117
Forest County301.55%9,3119,169
Dunn County311.54%46,13845,440
Florence County321.51%4,6344,565
Marathon County331.34%139,926138,078
Buffalo County341.26%13,47713,309
Shawano County351.22%41,35340,855
Marinette County361.19%42,38641,889
Winnebago County371.17%173,829171,815
Oneida County381.12%38,29237,869
Iowa County390.98%23,95223,719
Kewaunee County400.98%20,76420,563
Rock County410.85%165,152163,758
Ashland County420.84%16,15716,022
Monroe County430.79%46,66546,300
Walworth County440.77%106,138105,323
Barron County450.71%47,06946,737
Sauk County460.66%66,22065,784
Clark County470.54%34,85834,672
Rusk County480.4%14,23114,175
Trempealeau County490.31%30,91530,818
Richland County500.3%17,33517,283
Lincoln County510.28%28,50528,426
Manitowoc County520.26%81,59781,387
Menominee County530.21%4,2664,257
Racine County540.18%197,917197,568
Green County550.13%37,08337,035
Wood County560.08%74,26174,199
Fond du Lac County570.05%104,220104,169
La Crosse County580.03%120,954120,921
Douglas County59-0.02%44,34044,351
Sheboygan County60-0.1%117,934118,053
Price County61-0.26%13,98814,025
Jefferson County62-0.5%85,77986,208
Grant County63-0.75%51,59751,985
Kenosha County64-1.19%167,190169,195
Columbia County65-1.22%57,81758,533
Waupaca County66-1.26%51,14451,798
Langlade County67-1.31%19,20819,463
Jackson County68-1.5%20,77921,096
Dodge County69-1.58%87,94589,353
Crawford County70-1.76%15,80216,085
Juneau County71-2.03%26,23226,775
Milwaukee County72-2.78%912,459938,550

Wisconsin County Growth Overview

Wisconsin's counties show varied growth patterns from 2020 to 2025. Adams County leads with 5.64% annualized growth, followed by Dane County (4.96%) and St. Croix County (4.78%). The largest counties are Milwaukee County (912,459), Dane County (590,525), and Waukesha County (417,227). Of the 72 counties in Wisconsin, 58 are growing while 14 have experienced population decline. Overall, counties averaged 1.26% annualized growth, with total population growing by 0.93% annually.