Counties in Wisconsin by population under 18

Menominee County had the highest population under 18 of 72 counties in 2015, at 32.9%. Iron County had the lowest, at 14.9%. The median was 21.6% and the figure for Wisconsin was 22.5%. Source: the U.S. Census Bureau.

Highest32.9Menominee County
Lowest14.9Iron County
Median21.672 counties
Wisconsin22.5History

Top 40 counties, 2015

Menominee County: 32.9 %Menominee County32.9Clark County: 28.9 %Clark County28.9St. Croix County: 26.1 %St. Croix County26.1Vernon County: 26.1 %Vernon County26.1Calumet County: 25.7 %Calumet County25.7Monroe County: 25.5 %Monroe County25.5Lafayette County: 25.5 %Lafayette County25.5Trempealeau County: 24.4 %Trempealeau County24.4Taylor County: 24.4 %Taylor County24.4Milwaukee County: 24.2 %Milwaukee County24.2Brown County: 24.2 %Brown County24.2Outagamie County: 24.1 %Outagamie County24.1Kenosha County: 24.1 %Kenosha County24.1Rock County: 23.9 %Rock County23.9Racine County: 23.6 %Racine County23.6Iowa County: 23.4 %Iowa County23.4Marathon County: 23.2 %Marathon County23.2Chippewa County: 22.9 %Chippewa County22.9Washington County: 22.9 %Washington County22.9Green County: 22.9 %Green County22.9Richland County: 22.7 %Richland County22.7Jefferson County: 22.7 %Jefferson County22.7Sauk County: 22.7 %Sauk County22.7Sheboygan County: 22.6 %Sheboygan County22.6Jackson County: 22.6 %Jackson County22.6Waukesha County: 22.5 %Waukesha County22.5Kewaunee County: 22.4 %Kewaunee County22.4Columbia County: 22.3 %Columbia County22.3Green Lake County: 22.3 %Green Lake County22.3Ashland County: 22.2 %Ashland County22.2Ozaukee County: 22 %Ozaukee County22Polk County: 22 %Polk County22Walworth County: 21.9 %Walworth County21.9Fond du Lac County: 21.9 %Fond du Lac County21.9Pepin County: 21.9 %Pepin County21.9Shawano County: 21.8 %Shawano County21.8Barron County: 21.5 %Barron County21.5Wood County: 21.5 %Wood County21.5Pierce County: 21.3 %Pierce County21.3Buffalo County: 21.2 %Buffalo County21.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2015 (%)Change on 2014
1Menominee County32.9+0.2 pts
2Clark County28.9-0.1 pts
3St. Croix County26.1-0.2 pts
4Vernon County26.10 pts
5Calumet County25.7-0.1 pts
6Monroe County25.50 pts
7Lafayette County25.5+0.1 pts
8Trempealeau County24.4+0.2 pts
9Taylor County24.40 pts
10Milwaukee County24.2-0.1 pts
11Brown County24.2-0.2 pts
12Outagamie County24.1-0.1 pts
13Kenosha County24.1-0.3 pts
14Rock County23.9-0.1 pts
15Racine County23.6-0.2 pts
16Iowa County23.4-0 pts
17Marathon County23.2-0.2 pts
18Chippewa County22.90 pts
19Washington County22.9-0.3 pts
20Green County22.9-0.2 pts
21Richland County22.7-0.1 pts
22Jefferson County22.7-0.3 pts
23Sauk County22.7-0.3 pts
24Sheboygan County22.6-0.2 pts
25Jackson County22.6-0 pts
26Waukesha County22.5-0.2 pts
27Kewaunee County22.40 pts
28Columbia County22.3-0.1 pts
29Green Lake County22.3-0.4 pts
30Ashland County22.2-0.4 pts
31Ozaukee County22-0.1 pts
32Polk County22-0.2 pts
33Walworth County21.9-0.1 pts
34Fond du Lac County21.9-0.1 pts
35Pepin County21.9-0.6 pts
36Shawano County21.8-0.1 pts
37Barron County21.5+0.1 pts
38Wood County21.5-0.1 pts
39Pierce County21.3-0.1 pts
40Buffalo County21.20 pts
41Manitowoc County21.2-0.2 pts
42Dane County21.1-0.2 pts
43Crawford County21-0.3 pts
44Winnebago County20.9-0.1 pts
45Rusk County20.9-0.3 pts
46Waupaca County20.9-0.3 pts
47Dodge County20.8-0.3 pts
48Eau Claire County20.8-0 pts
49Grant County20.7+0.1 pts
50Oconto County20.7-0.2 pts
51Forest County20.7-0.4 pts
52Dunn County20.6+0.1 pts
53La Crosse County20.5-0.1 pts
54Douglas County20.3-0.3 pts
55Portage County20.1-0.1 pts
56Juneau County20.1-0.1 pts
57Marquette County20+0.2 pts
58Lincoln County19.9-0.3 pts
59Langlade County19.8-0.2 pts
60Sawyer County19.5-0 pts
61Marinette County19.4-0.1 pts
62Washburn County19.1-0.3 pts
63Waushara County18.9+0.1 pts
64Burnett County18.3+0.2 pts
65Bayfield County17.9+0.2 pts
66Price County17.8-0 pts
67Oneida County17.20 pts
68Door County16.4-0.3 pts
69Vilas County16.4+0.1 pts
70Florence County15.6-0.2 pts
71Adams County15.2-0.1 pts
72Iron County14.9-0.6 pts

Other periods

About this ranking

Residents aged 0 to 17 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Uses the US age of majority. Not comparable with population_0_14_share, which stops at 14.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in Wisconsin by population under 18, 2015) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Wisconsin by population under 18, 2015. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-under-18/wisconsin-counties?period=2015. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in Wisconsin by population under 18, 2015. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-under-18/wisconsin-counties?period=2015.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Wisconsin by population under 18, 2015 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/wisconsin-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_wisconsin_by_2015,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Wisconsin by population under 18, 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-under-18/wisconsin-counties?period=2015. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Wisconsin by population under 18, 2015
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-under-18/wisconsin-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/wisconsin-counties?period=2015.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  - 
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Questions

Which county has the highest population under 18?

Menominee County, with 32.9% in 2015, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Iron County, with 14.9% in 2015.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex: residents aged 0 to 17 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population under 18: other rankings

Counties in Wisconsin: more rankings