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 2023, at 29.5%. Cook County had the lowest, at 14.5%. The median was 22.9% and the figure for Minnesota was 22.5%. Source: the U.S. Census Bureau.

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Highest29.5Mahnomen County
Lowest14.5Cook County
Median22.987 counties
Minnesota22.5History

Map of counties, 2023

Aitkin County: 15 %Anoka County: 23.7 %Becker County: 22.9 %Beltrami County: 24 %Benton County: 24.3 %Big Stone County: 22 %Blue Earth County: 19.6 %Brown County: 21.6 %Carlton County: 21.6 %Carver County: 25.2 %Cass County: 19.9 %Chippewa County: 24.4 %Chisago County: 22.4 %Clay County: 25.1 %Clearwater County: 25.2 %Cook County: 14.5 %Cottonwood County: 24.4 %Crow Wing County: 20.3 %Dakota County: 23.6 %Dodge County: 25.4 %Douglas County: 21.1 %Faribault County: 21.5 %Fillmore County: 23.6 %Freeborn County: 21.5 %Goodhue County: 21.6 %Grant County: 23.3 %Hennepin County: 20.9 %Houston County: 21.7 %Hubbard County: 21.2 %Isanti County: 23.2 %Itasca County: 20.6 %Jackson County: 21.6 %Kanabec County: 21.8 %Kandiyohi County: 24.3 %Kittson County: 21.8 %Koochiching County: 18 %Lac qui Parle County: 22.3 %Lake County: 18.2 %Lake of the Woods County: 18.1 %Le Sueur County: 23 %Lincoln County: 22.9 %Lyon County: 25.9 %McLeod County: 21.6 %Mahnomen County: 29.5 %Marshall County: 23.4 %Martin County: 22.1 %Meeker County: 23.3 %Mille Lacs County: 23 %Morrison County: 22.9 %Mower County: 25.2 %Murray County: 21.4 %Nicollet County: 21.8 %Nobles County: 28.9 %Norman County: 22.4 %Olmsted County: 23 %Otter Tail County: 21.2 %Pennington County: 21.8 %Pine County: 19.6 %Pipestone County: 26 %Polk County: 24.7 %Pope County: 21.9 %Ramsey County: 22.2 %Red Lake County: 24.5 %Redwood County: 24.8 %Renville County: 23.1 %Rice County: 21.1 %Rock County: 23.5 %Roseau County: 23.6 %St. Louis County: 18.3 %Scott County: 25.3 %Sherburne County: 25.9 %Sibley County: 22.9 %Stearns County: 23.7 %Steele County: 23.7 %Stevens County: 23.2 %Swift County: 22.9 %Todd County: 25.2 %Traverse County: 21.6 %Wabasha County: 21.5 %Wadena County: 25.4 %Waseca County: 22.1 %Washington County: 23.7 %Watonwan County: 26.9 %Wilkin County: 23.6 %Winona County: 17.9 %Wright County: 27.2 %Yellow Medicine County: 23.3 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 and over
%, 2023. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2023

Mahnomen County: 29.5 %Mahnomen County29.5Nobles County: 28.9 %Nobles County28.9Wright County: 27.2 %Wright County27.2Watonwan County: 26.9 %Watonwan County26.9Pipestone County: 26 %Pipestone County26Lyon County: 25.9 %Lyon County25.9Sherburne County: 25.9 %Sherburne County25.9Dodge County: 25.4 %Dodge County25.4Wadena County: 25.4 %Wadena County25.4Scott County: 25.3 %Scott County25.3Carver County: 25.2 %Carver County25.2Todd County: 25.2 %Todd County25.2Mower County: 25.2 %Mower County25.2Clearwater County: 25.2 %Clearwater County25.2Clay County: 25.1 %Clay County25.1Redwood County: 24.8 %Redwood County24.8Polk County: 24.7 %Polk County24.7Red Lake County: 24.5 %Red Lake County24.5Chippewa County: 24.4 %Chippewa County24.4Cottonwood County: 24.4 %Cottonwood County24.4Benton County: 24.3 %Benton County24.3Kandiyohi County: 24.3 %Kandiyohi County24.3Beltrami County: 24 %Beltrami County24Anoka County: 23.7 %Anoka County23.7Washington County: 23.7 %Washington County23.7Stearns County: 23.7 %Stearns County23.7Steele County: 23.7 %Steele County23.7Fillmore County: 23.6 %Fillmore County23.6Wilkin County: 23.6 %Wilkin County23.6Dakota County: 23.6 %Dakota County23.6Roseau County: 23.6 %Roseau County23.6Rock County: 23.5 %Rock County23.5Marshall County: 23.4 %Marshall County23.4Meeker County: 23.3 %Meeker County23.3Grant County: 23.3 %Grant County23.3Yellow Medicine County: 23.3 %Yellow Medicine County23.3Stevens County: 23.2 %Stevens County23.2Isanti County: 23.2 %Isanti County23.2Renville County: 23.1 %Renville County23.1Le Sueur County: 23 %Le Sueur County23Mahnomen County: 29.5 %Mahnomen County29.5Nobles County: 28.9 %Nobles County28.9Wright County: 27.2 %Wright County27.2Watonwan County: 26.9 %Watonwan County26.9Pipestone County: 26 %Pipestone County26Lyon County: 25.9 %Lyon County25.9Sherburne County: 25.9 %Sherburne County25.9Dodge County: 25.4 %Dodge County25.4Wadena County: 25.4 %Wadena County25.4Scott County: 25.3 %Scott County25.3Carver County: 25.2 %Carver County25.2Todd County: 25.2 %Todd County25.2Mower County: 25.2 %Mower County25.2Clearwater County: 25.2 %Clearwater County25.2Clay County: 25.1 %Clay County25.1Redwood County: 24.8 %Redwood County24.8Polk County: 24.7 %Polk County24.7Red Lake County: 24.5 %Red Lake County24.5Chippewa County: 24.4 %Chippewa County24.4Cottonwood County: 24.4 %Cottonwood County24.4Benton County: 24.3 %Benton County24.3Kandiyohi County: 24.3 %Kandiyohi County24.3Beltrami County: 24 %Beltrami County24Anoka County: 23.7 %Anoka County23.7Washington County: 23.7 %Washington County23.7Stearns County: 23.7 %Stearns County23.7Steele County: 23.7 %Steele County23.7Fillmore County: 23.6 %Fillmore County23.6Wilkin County: 23.6 %Wilkin County23.6Dakota County: 23.6 %Dakota County23.6Roseau County: 23.6 %Roseau County23.6Rock County: 23.5 %Rock County23.5Marshall County: 23.4 %Marshall County23.4Meeker County: 23.3 %Meeker County23.3Grant County: 23.3 %Grant County23.3Yellow Medicine County: 23.3 %Yellow Medicine County23.3Stevens County: 23.2 %Stevens County23.2Isanti County: 23.2 %Isanti County23.2Renville County: 23.1 %Renville County23.1Le Sueur County: 23 %Le Sueur County23
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Mahnomen County29.5-0.2 pts
2Nobles County28.9+0.3 pts
3Wright County27.2-0.3 pts
4Watonwan County26.9+0.3 pts
5Pipestone County26+0.1 pts
6Lyon County25.9+0.2 pts
7Sherburne County25.9-0.2 pts
8Dodge County25.4-0.3 pts
9Wadena County25.4+0.2 pts
10Scott County25.3-0.6 pts
11Carver County25.2-0.5 pts
11Todd County25.2+0.2 pts
13Mower County25.2-0.1 pts
14Clearwater County25.2+0.3 pts
15Clay County25.1-0 pts
16Redwood County24.8-0.1 pts
17Polk County24.7-0 pts
18Red Lake County24.50 pts
19Chippewa County24.4+0.3 pts
20Cottonwood County24.4-0.4 pts
21Benton County24.3-0.3 pts
22Kandiyohi County24.3-0 pts
23Beltrami County24-0.5 pts
24Anoka County23.7-0.1 pts
25Washington County23.7-0.3 pts
26Stearns County23.7-0.1 pts
27Steele County23.7-0.4 pts
28Fillmore County23.6-0.1 pts
29Wilkin County23.6+0.2 pts
30Dakota County23.6-0.2 pts
31Roseau County23.6-0.2 pts
32Rock County23.5-0.7 pts
33Marshall County23.4+0.2 pts
34Meeker County23.3-0.2 pts
35Grant County23.3-0.1 pts
36Yellow Medicine County23.3+0.3 pts
37Stevens County23.2-0.1 pts
38Isanti County23.2-0.4 pts
39Renville County23.10 pts
40Le Sueur County23-0.4 pts
41Olmsted County23-0.3 pts
42Mille Lacs County23-0.3 pts
43Morrison County22.9-0.3 pts
44Swift County22.9+0.1 pts
45Becker County22.9-0.5 pts
46Sibley County22.9+0.3 pts
47Lincoln County22.9-0.2 pts
48Chisago County22.4-0.2 pts
49Norman County22.4-0.3 pts
50Lac qui Parle County22.3+0.7 pts
51Ramsey County22.2-0.2 pts
52Martin County22.1+0.3 pts
53Waseca County22.1-0.3 pts
54Big Stone County22+0.1 pts
55Pope County21.9-0.1 pts
56Kittson County21.8+0.1 pts
56Pennington County21.8-0.4 pts
58Kanabec County21.8-0.3 pts
59Nicollet County21.8-0.3 pts
60Houston County21.7-0 pts
61Goodhue County21.6-0.3 pts
62Carlton County21.6-0.3 pts
63McLeod County21.6-0.1 pts
64Jackson County21.6-0.4 pts
65Brown County21.6+0.1 pts
66Traverse County21.6-0.6 pts
67Wabasha County21.5-0.1 pts
68Faribault County21.5-0.4 pts
69Freeborn County21.5-0.4 pts
70Murray County21.4-0.3 pts
71Otter Tail County21.2-0 pts
72Hubbard County21.2-0.6 pts
73Rice County21.1-0.3 pts
74Douglas County21.1-0.3 pts
75Hennepin County20.9-0.2 pts
76Itasca County20.6-0.2 pts
77Crow Wing County20.3-0.3 pts
78Cass County19.9-0.4 pts
79Pine County19.6-0.3 pts
80Blue Earth County19.6-0.2 pts
81St. Louis County18.3-0.2 pts
82Lake County18.2-0.5 pts
83Lake of the Woods County18.1-0.3 pts
84Koochiching County18-0.4 pts
85Winona County17.9-0.2 pts
86Aitkin County15-0.2 pts
87Cook County14.5-0.5 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, 2023) [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, 2023. 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=2023. 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, 2023. 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=2023.

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, 2023 [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=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_minnesota_by_2023,
  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, 2023}},
  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=2023. 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, 2023
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=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/minnesota-counties?period=2023.
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 29.5% in 2023, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Cook County, with 14.5% in 2023.

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