Wisconsin Population By County in 2021 (ACS-5Yrs)

Updated on February 28, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the total population of Wisconsin was 5.87M. Among all Wisconsin counties, Milwaukee was the most populated county (939.12K), followed by Dane (555.47K), and then Waukesha (405.33K).

On the other hand, the least populated counties were: Menominee (4.32K), Florence (4.54K), and Iron (6.07K).

The chart and table below shows the population of each county and the percentage of Wisconsin population in each county.

You can see similar information for other states and by state for the United States.

Related Topics: Wisconsin ACS-5Yrs Estimates, 2021 Topic List.

Data Source: US Census - ACS 5-Year Estimates, 2021 Census.

Wisconsin Population By County in 2021

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County	Population	% of State Population
Adams	20505	0.35
Ashland	16002	0.27
Barron	46529	0.79
Bayfield	16031	0.27
Brown	267364	4.55
Buffalo	13314	0.23
Burnett	16356	0.28
Calumet	52128	0.89
Chippewa	65877	1.12
Clark	34655	0.59
Columbia	58219	0.99
Crawford	16167	0.28
Dane	555474	9.46
Dodge	89274	1.52
Door	29713	0.51
Douglas	44034	0.75
Dunn	45254	0.77
Eau Claire	105206	1.79
Florence	4542	0.08
Fond du Lac	103890	1.77
Forest	9184	0.16
Grant	52210	0.89
Green	37098	0.63
Green Lake	18990	0.32
Iowa	23715	0.40
Iron	6074	0.10
Jackson	21004	0.36
Jefferson	84808	1.44
Juneau	26595	0.45
Kenosha	168743	2.87
Kewaunee	20535	0.35
La Crosse	120291	2.05
Lafayette	16662	0.28
Langlade	19469	0.33
Lincoln	28378	0.48
Manitowoc	81103	1.38
Marathon	137597	2.34
Marinette	41720	0.71
Marquette	15515	0.26
Menominee	4318	0.07
Milwaukee	939123	15.99
Monroe	46091	0.79
Oconto	38691	0.66
Oneida	37468	0.64
Outagamie	189620	3.23
Ozaukee	91029	1.55
Pepin	7328	0.13
Pierce	42204	0.72
Polk	44806	0.76
Portage	70378	1.20
Price	14003	0.24
Racine	197379	3.36
Richland	17353	0.30
Rock	163522	2.79
Rusk	14182	0.24
St. Croix	92495	1.58
Sauk	65428	1.11
Sawyer	17813	0.30
Shawano	40836	0.70
Sheboygan	117528	2.00
Taylor	19960	0.34
Trempealeau	30504	0.52
Vernon	30719	0.52
Vilas	22813	0.39
Walworth	105945	1.80
Washburn	16561	0.28
Washington	136300	2.32
Waukesha	405332	6.90
Waupaca	51769	0.88
Waushara	24527	0.42
Winnebago	171304	2.92
Wood	74107	1.26