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 2015, at 29.7%. Cook County had the lowest, at 15.5%. The median was 23.1% and the figure for Minnesota was 23.5%. Source: the U.S. Census Bureau.

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Highest29.7Mahnomen County
Lowest15.5Cook County
Median23.187 counties
Minnesota23.5History

Map of counties, 2015

Aitkin County: 17.2 %Anoka County: 24.5 %Becker County: 24.6 %Beltrami County: 25 %Benton County: 24.7 %Big Stone County: 20.4 %Blue Earth County: 20.1 %Brown County: 21.6 %Carlton County: 22.8 %Carver County: 28 %Cass County: 21.3 %Chippewa County: 23 %Chisago County: 23.5 %Clay County: 24 %Clearwater County: 24.7 %Cook County: 15.5 %Cottonwood County: 23.4 %Crow Wing County: 22.2 %Dakota County: 25 %Dodge County: 27.3 %Douglas County: 21.4 %Faribault County: 22 %Fillmore County: 23.9 %Freeborn County: 22.1 %Goodhue County: 22.9 %Grant County: 22.3 %Hennepin County: 22 %Houston County: 21.8 %Hubbard County: 21.6 %Isanti County: 24.6 %Itasca County: 21.6 %Jackson County: 22.4 %Kanabec County: 21.9 %Kandiyohi County: 24.3 %Kittson County: 21.5 %Koochiching County: 19.7 %Lac qui Parle County: 20.7 %Lake County: 19 %Lake of the Woods County: 18.2 %Le Sueur County: 24.4 %Lincoln County: 23 %Lyon County: 24.8 %McLeod County: 23.4 %Mahnomen County: 29.7 %Marshall County: 23.3 %Martin County: 21.4 %Meeker County: 24.4 %Mille Lacs County: 24 %Morrison County: 23.6 %Mower County: 24.8 %Murray County: 21.3 %Nicollet County: 22.3 %Nobles County: 26.6 %Norman County: 22.5 %Olmsted County: 24.5 %Otter Tail County: 21.5 %Pennington County: 23 %Pine County: 21.1 %Pipestone County: 24.1 %Polk County: 23.7 %Pope County: 21.2 %Ramsey County: 23.1 %Red Lake County: 25.1 %Redwood County: 24.5 %Renville County: 22.5 %Rice County: 22.4 %Rock County: 25.7 %Roseau County: 25 %St. Louis County: 19.3 %Scott County: 28.8 %Sherburne County: 27.3 %Sibley County: 23.9 %Stearns County: 23.3 %Steele County: 25.5 %Stevens County: 22.1 %Swift County: 22 %Todd County: 24.3 %Traverse County: 21.4 %Wabasha County: 21.6 %Wadena County: 24 %Waseca County: 23.2 %Washington County: 25.2 %Watonwan County: 24.3 %Wilkin County: 23.5 %Winona County: 18.9 %Wright County: 28.9 %Yellow Medicine County: 23.1 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 and over
%, 2015. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2015

Mahnomen County: 29.7 %Mahnomen County29.7Wright County: 28.9 %Wright County28.9Scott County: 28.8 %Scott County28.8Carver County: 28 %Carver County28Sherburne County: 27.3 %Sherburne County27.3Dodge County: 27.3 %Dodge County27.3Nobles County: 26.6 %Nobles County26.6Rock County: 25.7 %Rock County25.7Steele County: 25.5 %Steele County25.5Washington County: 25.2 %Washington County25.2Red Lake County: 25.1 %Red Lake County25.1Dakota County: 25 %Dakota County25Beltrami County: 25 %Beltrami County25Roseau County: 25 %Roseau County25Lyon County: 24.8 %Lyon County24.8Mower County: 24.8 %Mower County24.8Benton County: 24.7 %Benton County24.7Clearwater County: 24.7 %Clearwater County24.7Isanti County: 24.6 %Isanti County24.6Becker County: 24.6 %Becker County24.6Anoka County: 24.5 %Anoka County24.5Olmsted County: 24.5 %Olmsted County24.5Redwood County: 24.5 %Redwood County24.5Le Sueur County: 24.4 %Le Sueur County24.4Meeker County: 24.4 %Meeker County24.4Todd County: 24.3 %Todd County24.3Kandiyohi County: 24.3 %Kandiyohi County24.3Watonwan County: 24.3 %Watonwan County24.3Pipestone County: 24.1 %Pipestone County24.1Clay County: 24 %Clay County24Mille Lacs County: 24 %Mille Lacs County24Wadena County: 24 %Wadena County24Fillmore County: 23.9 %Fillmore County23.9Sibley County: 23.9 %Sibley County23.9Polk County: 23.7 %Polk County23.7Morrison County: 23.6 %Morrison County23.6Chisago County: 23.5 %Chisago County23.5Wilkin County: 23.5 %Wilkin County23.5McLeod County: 23.4 %McLeod County23.4Cottonwood County: 23.4 %Cottonwood County23.4Mahnomen County: 29.7 %Mahnomen County29.7Wright County: 28.9 %Wright County28.9Scott County: 28.8 %Scott County28.8Carver County: 28 %Carver County28Sherburne County: 27.3 %Sherburne County27.3Dodge County: 27.3 %Dodge County27.3Nobles County: 26.6 %Nobles County26.6Rock County: 25.7 %Rock County25.7Steele County: 25.5 %Steele County25.5Washington County: 25.2 %Washington County25.2Red Lake County: 25.1 %Red Lake County25.1Dakota County: 25 %Dakota County25Beltrami County: 25 %Beltrami County25Roseau County: 25 %Roseau County25Lyon County: 24.8 %Lyon County24.8Mower County: 24.8 %Mower County24.8Benton County: 24.7 %Benton County24.7Clearwater County: 24.7 %Clearwater County24.7Isanti County: 24.6 %Isanti County24.6Becker County: 24.6 %Becker County24.6Anoka County: 24.5 %Anoka County24.5Olmsted County: 24.5 %Olmsted County24.5Redwood County: 24.5 %Redwood County24.5Le Sueur County: 24.4 %Le Sueur County24.4Meeker County: 24.4 %Meeker County24.4Todd County: 24.3 %Todd County24.3Kandiyohi County: 24.3 %Kandiyohi County24.3Watonwan County: 24.3 %Watonwan County24.3Pipestone County: 24.1 %Pipestone County24.1Clay County: 24 %Clay County24Mille Lacs County: 24 %Mille Lacs County24Wadena County: 24 %Wadena County24Fillmore County: 23.9 %Fillmore County23.9Sibley County: 23.9 %Sibley County23.9Polk County: 23.7 %Polk County23.7Morrison County: 23.6 %Morrison County23.6Chisago County: 23.5 %Chisago County23.5Wilkin County: 23.5 %Wilkin County23.5McLeod County: 23.4 %McLeod County23.4Cottonwood County: 23.4 %Cottonwood County23.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2015 (%)Change on 2014
1Mahnomen County29.7-0.2 pts
2Wright County28.9-0.3 pts
3Scott County28.8-0.2 pts
4Carver County28-0.3 pts
5Sherburne County27.3-0.2 pts
6Dodge County27.3-0.6 pts
7Nobles County26.6+0.4 pts
8Rock County25.7+0.3 pts
9Steele County25.5+0.1 pts
10Washington County25.2-0.2 pts
11Red Lake County25.1+0.3 pts
12Dakota County25-0.2 pts
13Beltrami County25-0.3 pts
14Roseau County25-0.3 pts
15Lyon County24.8+0.2 pts
16Mower County24.80 pts
17Benton County24.7+0.1 pts
18Clearwater County24.7+0.1 pts
19Isanti County24.6-0.3 pts
20Becker County24.6+0.1 pts
21Anoka County24.5-0.2 pts
22Olmsted County24.5-0 pts
23Redwood County24.5+0.1 pts
24Le Sueur County24.4-0.1 pts
25Meeker County24.4-0.1 pts
26Todd County24.30 pts
27Kandiyohi County24.3+0.2 pts
28Watonwan County24.30 pts
29Pipestone County24.1+0.4 pts
30Clay County24+0.5 pts
31Mille Lacs County24-0.4 pts
32Wadena County24+0.2 pts
33Fillmore County23.9+0.1 pts
34Sibley County23.9-0.7 pts
35Polk County23.7+0.3 pts
36Morrison County23.6-0 pts
37Chisago County23.5-0.3 pts
38Wilkin County23.50 pts
39McLeod County23.4-0.3 pts
40Cottonwood County23.4+0.2 pts
41Marshall County23.3+0.2 pts
42Stearns County23.3+0.1 pts
43Waseca County23.2-0 pts
44Ramsey County23.1-0.1 pts
45Yellow Medicine County23.1+0.1 pts
46Pennington County23+0.2 pts
47Lincoln County23+0.2 pts
48Chippewa County23+0.5 pts
49Goodhue County22.9-0.1 pts
50Carlton County22.8-0.1 pts
51Norman County22.5-0.1 pts
52Renville County22.5-0 pts
53Rice County22.4-0.1 pts
54Jackson County22.4-0.2 pts
55Grant County22.3+0.2 pts
56Nicollet County22.3-0.1 pts
57Crow Wing County22.2-0.2 pts
58Stevens County22.1+0.4 pts
59Freeborn County22.1-0.1 pts
60Hennepin County22-0.1 pts
61Swift County22+0.2 pts
62Faribault County22-0 pts
63Kanabec County21.9-0.1 pts
64Houston County21.8+0.2 pts
65Wabasha County21.6-0.2 pts
66Itasca County21.6+0.1 pts
67Hubbard County21.6-0 pts
68Brown County21.6-0 pts
69Kittson County21.5-0.1 pts
70Otter Tail County21.5-0 pts
71Martin County21.4-0.2 pts
72Douglas County21.4+0.2 pts
73Traverse County21.4+0.3 pts
74Cass County21.3+0.1 pts
75Murray County21.3-0.4 pts
76Pope County21.2-0.1 pts
77Pine County21.1-0.1 pts
78Lac qui Parle County20.7-0.1 pts
79Big Stone County20.4-0.1 pts
80Blue Earth County20.1+0.1 pts
81Koochiching County19.7+0.1 pts
82St. Louis County19.3-0.1 pts
83Lake County19-0.1 pts
84Winona County18.9-0 pts
85Lake of the Woods County18.2-0.1 pts
86Aitkin County17.2-0 pts
87Cook County15.5-0.4 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, 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 Minnesota 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/minnesota-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 Minnesota 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/minnesota-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 Minnesota 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/minnesota-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_minnesota_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 Minnesota 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/minnesota-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 Minnesota 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/minnesota-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/minnesota-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?

Mahnomen County, with 29.7% in 2015, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Cook County, with 15.5% 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 Minnesota: more rankings