Data / Rankings / Population under 18 / Counties in Minnesota

Counties in Minnesota by population under 18

Mahnomen County had the highest population under 18 of 87 counties in 2024, at 29.4%. Cook County had the lowest, at 14.5%. The median was 22.7% and the figure for Minnesota was 22.3%. Source: the U.S. Census Bureau.

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Highest29.4Mahnomen County
Lowest14.5Cook County
Median22.787 counties
Minnesota22.3History

Map of counties, 2024

Aitkin County: 15.1 %Anoka County: 23.4 %Becker County: 22.7 %Beltrami County: 23.6 %Benton County: 23.8 %Big Stone County: 22.1 %Blue Earth County: 19.4 %Brown County: 21.4 %Carlton County: 21.2 %Carver County: 24.6 %Cass County: 19.6 %Chippewa County: 24.5 %Chisago County: 22.2 %Clay County: 24.5 %Clearwater County: 24.6 %Cook County: 14.5 %Cottonwood County: 24.8 %Crow Wing County: 19.9 %Dakota County: 23.3 %Dodge County: 25 %Douglas County: 20.9 %Faribault County: 21.4 %Fillmore County: 23.4 %Freeborn County: 21.3 %Goodhue County: 21.4 %Grant County: 22.8 %Hennepin County: 20.7 %Houston County: 21.1 %Hubbard County: 20.6 %Isanti County: 23 %Itasca County: 20.3 %Jackson County: 21.2 %Kanabec County: 21.5 %Kandiyohi County: 24.3 %Kittson County: 22.1 %Koochiching County: 17.9 %Lac qui Parle County: 22.4 %Lake County: 18.2 %Lake of the Woods County: 17.5 %Le Sueur County: 22.8 %Lincoln County: 22.4 %Lyon County: 25.5 %McLeod County: 21.3 %Mahnomen County: 29.4 %Marshall County: 23.2 %Martin County: 21.9 %Meeker County: 23.1 %Mille Lacs County: 22.9 %Morrison County: 22.8 %Mower County: 25.1 %Murray County: 21.3 %Nicollet County: 21.5 %Nobles County: 28.9 %Norman County: 22.3 %Olmsted County: 22.7 %Otter Tail County: 21.1 %Pennington County: 21.5 %Pine County: 19.2 %Pipestone County: 25.9 %Polk County: 24.5 %Pope County: 21.7 %Ramsey County: 22.1 %Red Lake County: 24.2 %Redwood County: 24.6 %Renville County: 22.9 %Rice County: 20.9 %Rock County: 22.6 %Roseau County: 23.2 %St. Louis County: 18 %Scott County: 24.7 %Sherburne County: 25.5 %Sibley County: 22.9 %Stearns County: 23.5 %Steele County: 23.2 %Stevens County: 22.9 %Swift County: 22.7 %Todd County: 25.3 %Traverse County: 22.2 %Wabasha County: 21.3 %Wadena County: 25.5 %Waseca County: 21.6 %Washington County: 23.5 %Watonwan County: 27.7 %Wilkin County: 23.2 %Winona County: 17.7 %Wright County: 26.8 %Yellow Medicine County: 23.3 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 25
  • 25 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Mahnomen County: 29.4 %Mahnomen County29.4Nobles County: 28.9 %Nobles County28.9Watonwan County: 27.7 %Watonwan County27.7Wright County: 26.8 %Wright County26.8Pipestone County: 25.9 %Pipestone County25.9Lyon County: 25.5 %Lyon County25.5Sherburne County: 25.5 %Sherburne County25.5Wadena County: 25.5 %Wadena County25.5Todd County: 25.3 %Todd County25.3Mower County: 25.1 %Mower County25.1Dodge County: 25 %Dodge County25Cottonwood County: 24.8 %Cottonwood County24.8Scott County: 24.7 %Scott County24.7Carver County: 24.6 %Carver County24.6Clearwater County: 24.6 %Clearwater County24.6Redwood County: 24.6 %Redwood County24.6Polk County: 24.5 %Polk County24.5Clay County: 24.5 %Clay County24.5Chippewa County: 24.5 %Chippewa County24.5Kandiyohi County: 24.3 %Kandiyohi County24.3Red Lake County: 24.2 %Red Lake County24.2Benton County: 23.8 %Benton County23.8Beltrami County: 23.6 %Beltrami County23.6Stearns County: 23.5 %Stearns County23.5Washington County: 23.5 %Washington County23.5Anoka County: 23.4 %Anoka County23.4Fillmore County: 23.4 %Fillmore County23.4Yellow Medicine County: 23.3 %Yellow Medicine County23.3Dakota County: 23.3 %Dakota County23.3Steele County: 23.2 %Steele County23.2Wilkin County: 23.2 %Wilkin County23.2Marshall County: 23.2 %Marshall County23.2Roseau County: 23.2 %Roseau County23.2Meeker County: 23.1 %Meeker County23.1Isanti County: 23 %Isanti County23Sibley County: 22.9 %Sibley County22.9Stevens County: 22.9 %Stevens County22.9Renville County: 22.9 %Renville County22.9Mille Lacs County: 22.9 %Mille Lacs County22.9Le Sueur County: 22.8 %Le Sueur County22.8Mahnomen County: 29.4 %Mahnomen County29.4Nobles County: 28.9 %Nobles County28.9Watonwan County: 27.7 %Watonwan County27.7Wright County: 26.8 %Wright County26.8Pipestone County: 25.9 %Pipestone County25.9Lyon County: 25.5 %Lyon County25.5Sherburne County: 25.5 %Sherburne County25.5Wadena County: 25.5 %Wadena County25.5Todd County: 25.3 %Todd County25.3Mower County: 25.1 %Mower County25.1Dodge County: 25 %Dodge County25Cottonwood County: 24.8 %Cottonwood County24.8Scott County: 24.7 %Scott County24.7Carver County: 24.6 %Carver County24.6Clearwater County: 24.6 %Clearwater County24.6Redwood County: 24.6 %Redwood County24.6Polk County: 24.5 %Polk County24.5Clay County: 24.5 %Clay County24.5Chippewa County: 24.5 %Chippewa County24.5Kandiyohi County: 24.3 %Kandiyohi County24.3Red Lake County: 24.2 %Red Lake County24.2Benton County: 23.8 %Benton County23.8Beltrami County: 23.6 %Beltrami County23.6Stearns County: 23.5 %Stearns County23.5Washington County: 23.5 %Washington County23.5Anoka County: 23.4 %Anoka County23.4Fillmore County: 23.4 %Fillmore County23.4Yellow Medicine County: 23.3 %Yellow Medicine County23.3Dakota County: 23.3 %Dakota County23.3Steele County: 23.2 %Steele County23.2Wilkin County: 23.2 %Wilkin County23.2Marshall County: 23.2 %Marshall County23.2Roseau County: 23.2 %Roseau County23.2Meeker County: 23.1 %Meeker County23.1Isanti County: 23 %Isanti County23Sibley County: 22.9 %Sibley County22.9Stevens County: 22.9 %Stevens County22.9Renville County: 22.9 %Renville County22.9Mille Lacs County: 22.9 %Mille Lacs County22.9Le Sueur County: 22.8 %Le Sueur County22.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Mahnomen County29.4-0.1 pts
2Nobles County28.9-0 pts
3Watonwan County27.7+0.8 pts
4Wright County26.8-0.4 pts
5Pipestone County25.9-0.1 pts
6Lyon County25.5-0.4 pts
7Sherburne County25.5-0.4 pts
8Wadena County25.5+0.1 pts
9Todd County25.30 pts
10Mower County25.1-0 pts
11Dodge County25-0.5 pts
12Cottonwood County24.8+0.4 pts
13Scott County24.7-0.6 pts
14Carver County24.6-0.6 pts
15Clearwater County24.6-0.5 pts
16Redwood County24.6-0.2 pts
17Polk County24.5-0.2 pts
18Clay County24.5-0.6 pts
19Chippewa County24.50 pts
20Kandiyohi County24.3-0 pts
21Red Lake County24.2-0.2 pts
22Benton County23.8-0.5 pts
23Beltrami County23.6-0.4 pts
24Stearns County23.5-0.2 pts
25Washington County23.5-0.2 pts
26Anoka County23.4-0.3 pts
27Fillmore County23.4-0.2 pts
28Yellow Medicine County23.3+0.1 pts
29Dakota County23.3-0.3 pts
30Steele County23.2-0.5 pts
30Wilkin County23.2-0.4 pts
32Marshall County23.2-0.1 pts
33Roseau County23.2-0.5 pts
34Meeker County23.1-0.2 pts
35Isanti County23-0.2 pts
36Sibley County22.9+0.1 pts
37Stevens County22.9-0.3 pts
38Renville County22.9-0.2 pts
39Mille Lacs County22.9-0.1 pts
40Le Sueur County22.8-0.2 pts
41Grant County22.8-0.5 pts
42Morrison County22.8-0.2 pts
43Swift County22.7-0.2 pts
44Becker County22.7-0.2 pts
45Olmsted County22.7-0.3 pts
46Rock County22.6-0.8 pts
47Lincoln County22.4-0.5 pts
48Lac qui Parle County22.4+0.1 pts
49Norman County22.3-0.1 pts
50Traverse County22.2+0.6 pts
51Chisago County22.2-0.3 pts
52Kittson County22.1+0.3 pts
53Ramsey County22.1-0.2 pts
54Big Stone County22.10 pts
55Martin County21.9-0.3 pts
56Pope County21.7-0.2 pts
57Waseca County21.6-0.5 pts
58Nicollet County21.5-0.2 pts
59Pennington County21.5-0.3 pts
60Kanabec County21.5-0.3 pts
61Goodhue County21.4-0.2 pts
62Faribault County21.4-0.2 pts
63Brown County21.4-0.3 pts
64Freeborn County21.3-0.2 pts
65McLeod County21.3-0.3 pts
66Murray County21.3-0.2 pts
67Wabasha County21.3-0.3 pts
68Carlton County21.2-0.5 pts
69Jackson County21.2-0.4 pts
70Houston County21.1-0.6 pts
71Otter Tail County21.1-0.1 pts
72Douglas County20.9-0.2 pts
73Rice County20.9-0.2 pts
74Hennepin County20.7-0.2 pts
75Hubbard County20.6-0.6 pts
76Itasca County20.3-0.3 pts
77Crow Wing County19.9-0.4 pts
78Cass County19.6-0.4 pts
79Blue Earth County19.4-0.2 pts
80Pine County19.2-0.5 pts
81Lake County18.2-0 pts
82St. Louis County18-0.2 pts
83Koochiching County17.9-0.1 pts
84Winona County17.7-0.3 pts
85Lake of the Woods County17.5-0.6 pts
86Aitkin County15.1+0.1 pts
87Cook County14.5-0.1 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 Minnesota by population under 18, 2024) [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 Minnesota by population under 18, 2024. 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/minnesota-counties?period=2024. 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 Minnesota by population under 18, 2024. 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/minnesota-counties?period=2024.

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 Minnesota by population under 18, 2024 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/minnesota-counties?period=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_minnesota_by_2024,
  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 Minnesota by population under 18, 2024}},
  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/minnesota-counties?period=2024. 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 Minnesota by population under 18, 2024
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/minnesota-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/minnesota-counties?period=2024.
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?

Mahnomen County, with 29.4% in 2024, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Cook County, with 14.5% in 2024.

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 Minnesota: more rankings