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 2017, at 30.5%. Cook County had the lowest, at 16.1%. The median was 23.3% and the figure for Minnesota was 23.4%. Source: the U.S. Census Bureau.

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Highest30.5Mahnomen County
Lowest16.1Cook County
Median23.387 counties
Minnesota23.4History

Map of counties, 2017

Aitkin County: 16.9 %Anoka County: 24.4 %Becker County: 24.5 %Beltrami County: 25 %Benton County: 25.2 %Big Stone County: 20.7 %Blue Earth County: 20.3 %Brown County: 21.9 %Carlton County: 22.7 %Carver County: 27.8 %Cass County: 21.4 %Chippewa County: 23.1 %Chisago County: 23.3 %Clay County: 24.9 %Clearwater County: 24.5 %Cook County: 16.1 %Cottonwood County: 23.4 %Crow Wing County: 22 %Dakota County: 24.8 %Dodge County: 26.9 %Douglas County: 21.4 %Faribault County: 21.9 %Fillmore County: 24.2 %Freeborn County: 22.2 %Goodhue County: 22.7 %Grant County: 22.9 %Hennepin County: 21.9 %Houston County: 22.1 %Hubbard County: 21.7 %Isanti County: 24.1 %Itasca County: 21.3 %Jackson County: 22.5 %Kanabec County: 21.8 %Kandiyohi County: 24.6 %Kittson County: 20.6 %Koochiching County: 19.1 %Lac qui Parle County: 20.9 %Lake County: 18.6 %Lake of the Woods County: 18 %Le Sueur County: 24.4 %Lincoln County: 23.7 %Lyon County: 25.2 %McLeod County: 23.1 %Mahnomen County: 30.5 %Marshall County: 23.3 %Martin County: 21.7 %Meeker County: 24.1 %Mille Lacs County: 24.2 %Morrison County: 23.7 %Mower County: 25.2 %Murray County: 22.1 %Nicollet County: 22.7 %Nobles County: 27 %Norman County: 23 %Olmsted County: 24.1 %Otter Tail County: 21.7 %Pennington County: 22.5 %Pine County: 20.7 %Pipestone County: 24.4 %Polk County: 24.1 %Pope County: 21.3 %Ramsey County: 23 %Red Lake County: 25.1 %Redwood County: 24.6 %Renville County: 23 %Rice County: 22.4 %Rock County: 25.9 %Roseau County: 24.4 %St. Louis County: 19.3 %Scott County: 28.2 %Sherburne County: 26.8 %Sibley County: 24 %Stearns County: 23.4 %Steele County: 25.5 %Stevens County: 21.9 %Swift County: 22.9 %Todd County: 24.9 %Traverse County: 21.3 %Wabasha County: 21.7 %Wadena County: 24.2 %Waseca County: 23.4 %Washington County: 25 %Watonwan County: 24.7 %Wilkin County: 23.6 %Winona County: 18.8 %Wright County: 28.7 %Yellow Medicine County: 23.3 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 and over
%, 2017. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

Mahnomen County: 30.5 %Mahnomen County30.5Wright County: 28.7 %Wright County28.7Scott County: 28.2 %Scott County28.2Carver County: 27.8 %Carver County27.8Nobles County: 27 %Nobles County27Dodge County: 26.9 %Dodge County26.9Sherburne County: 26.8 %Sherburne County26.8Rock County: 25.9 %Rock County25.9Steele County: 25.5 %Steele County25.5Mower County: 25.2 %Mower County25.2Lyon County: 25.2 %Lyon County25.2Benton County: 25.2 %Benton County25.2Red Lake County: 25.1 %Red Lake County25.1Beltrami County: 25 %Beltrami County25Washington County: 25 %Washington County25Todd County: 24.9 %Todd County24.9Clay County: 24.9 %Clay County24.9Dakota County: 24.8 %Dakota County24.8Watonwan County: 24.7 %Watonwan County24.7Kandiyohi County: 24.6 %Kandiyohi County24.6Redwood County: 24.6 %Redwood County24.6Clearwater County: 24.5 %Clearwater County24.5Becker County: 24.5 %Becker County24.5Roseau County: 24.4 %Roseau County24.4Anoka County: 24.4 %Anoka County24.4Le Sueur County: 24.4 %Le Sueur County24.4Pipestone County: 24.4 %Pipestone County24.4Wadena County: 24.2 %Wadena County24.2Mille Lacs County: 24.2 %Mille Lacs County24.2Fillmore County: 24.2 %Fillmore County24.2Polk County: 24.1 %Polk County24.1Olmsted County: 24.1 %Olmsted County24.1Isanti County: 24.1 %Isanti County24.1Meeker County: 24.1 %Meeker County24.1Sibley County: 24 %Sibley County24Morrison County: 23.7 %Morrison County23.7Lincoln County: 23.7 %Lincoln County23.7Wilkin County: 23.6 %Wilkin County23.6Waseca County: 23.4 %Waseca County23.4Cottonwood County: 23.4 %Cottonwood County23.4Mahnomen County: 30.5 %Mahnomen County30.5Wright County: 28.7 %Wright County28.7Scott County: 28.2 %Scott County28.2Carver County: 27.8 %Carver County27.8Nobles County: 27 %Nobles County27Dodge County: 26.9 %Dodge County26.9Sherburne County: 26.8 %Sherburne County26.8Rock County: 25.9 %Rock County25.9Steele County: 25.5 %Steele County25.5Mower County: 25.2 %Mower County25.2Lyon County: 25.2 %Lyon County25.2Benton County: 25.2 %Benton County25.2Red Lake County: 25.1 %Red Lake County25.1Beltrami County: 25 %Beltrami County25Washington County: 25 %Washington County25Todd County: 24.9 %Todd County24.9Clay County: 24.9 %Clay County24.9Dakota County: 24.8 %Dakota County24.8Watonwan County: 24.7 %Watonwan County24.7Kandiyohi County: 24.6 %Kandiyohi County24.6Redwood County: 24.6 %Redwood County24.6Clearwater County: 24.5 %Clearwater County24.5Becker County: 24.5 %Becker County24.5Roseau County: 24.4 %Roseau County24.4Anoka County: 24.4 %Anoka County24.4Le Sueur County: 24.4 %Le Sueur County24.4Pipestone County: 24.4 %Pipestone County24.4Wadena County: 24.2 %Wadena County24.2Mille Lacs County: 24.2 %Mille Lacs County24.2Fillmore County: 24.2 %Fillmore County24.2Polk County: 24.1 %Polk County24.1Olmsted County: 24.1 %Olmsted County24.1Isanti County: 24.1 %Isanti County24.1Meeker County: 24.1 %Meeker County24.1Sibley County: 24 %Sibley County24Morrison County: 23.7 %Morrison County23.7Lincoln County: 23.7 %Lincoln County23.7Wilkin County: 23.6 %Wilkin County23.6Waseca County: 23.4 %Waseca County23.4Cottonwood County: 23.4 %Cottonwood County23.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Mahnomen County30.5+0.6 pts
2Wright County28.7-0.2 pts
3Scott County28.2-0.2 pts
4Carver County27.8-0.1 pts
5Nobles County27+0.1 pts
6Dodge County26.9-0.3 pts
7Sherburne County26.8-0.3 pts
8Rock County25.9+0.2 pts
9Steele County25.50 pts
10Mower County25.2+0.3 pts
11Lyon County25.20 pts
12Benton County25.2+0.2 pts
13Red Lake County25.1+0.3 pts
14Beltrami County25-0.1 pts
15Washington County25-0.1 pts
16Todd County24.9+0.4 pts
17Clay County24.9+0.4 pts
18Dakota County24.8-0.1 pts
19Watonwan County24.7+0.2 pts
20Kandiyohi County24.6+0.2 pts
21Redwood County24.6+0.2 pts
22Clearwater County24.5+0.2 pts
23Becker County24.5+0.1 pts
24Roseau County24.4-0.2 pts
25Anoka County24.4-0.1 pts
26Le Sueur County24.4+0.2 pts
27Pipestone County24.4-0 pts
28Wadena County24.2+0.2 pts
29Mille Lacs County24.20 pts
30Fillmore County24.2-0 pts
31Polk County24.1+0.2 pts
32Olmsted County24.1-0.2 pts
33Isanti County24.1-0.2 pts
34Meeker County24.1-0.1 pts
35Sibley County24+0.3 pts
36Morrison County23.7-0.1 pts
37Lincoln County23.7+0.5 pts
38Wilkin County23.6+0.4 pts
39Waseca County23.4-0 pts
40Cottonwood County23.4-0 pts
41Stearns County23.40 pts
42Chisago County23.30 pts
43Yellow Medicine County23.30 pts
44Marshall County23.3+0.2 pts
45McLeod County23.1-0.1 pts
46Chippewa County23.1+0.1 pts
47Ramsey County23-0 pts
48Norman County23+0.5 pts
49Renville County23+0.6 pts
50Grant County22.9-0.2 pts
51Swift County22.9+0.1 pts
52Nicollet County22.7+0.2 pts
53Carlton County22.7-0.1 pts
54Goodhue County22.7-0.2 pts
55Jackson County22.5+0.2 pts
56Pennington County22.5-0.4 pts
57Rice County22.40 pts
58Freeborn County22.2+0.2 pts
59Houston County22.1+0.2 pts
60Murray County22.1+0.4 pts
61Crow Wing County22-0 pts
62Faribault County21.9-0 pts
63Brown County21.9+0.1 pts
64Stevens County21.9-0.1 pts
65Hennepin County21.9-0.1 pts
66Kanabec County21.8+0.2 pts
67Wabasha County21.7+0.2 pts
68Hubbard County21.70 pts
69Otter Tail County21.7-0 pts
70Martin County21.7-0 pts
71Cass County21.4+0.1 pts
72Douglas County21.4-0.1 pts
73Traverse County21.3+0.4 pts
74Pope County21.3+0.2 pts
75Itasca County21.3-0.2 pts
76Lac qui Parle County20.9+0.6 pts
77Big Stone County20.7+0.2 pts
78Pine County20.70 pts
79Kittson County20.6-0.4 pts
80Blue Earth County20.3+0.1 pts
81St. Louis County19.3-0.1 pts
82Koochiching County19.1-0.2 pts
83Winona County18.8-0.1 pts
84Lake County18.6-0.2 pts
85Lake of the Woods County18+0.1 pts
86Aitkin County16.9-0.1 pts
87Cook County16.1+0.3 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, 2017) [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, 2017. 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=2017. 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, 2017. 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=2017.

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, 2017 [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=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_minnesota_by_2017,
  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, 2017}},
  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=2017. 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, 2017
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=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/minnesota-counties?period=2017.
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 30.5% in 2017, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Cook County, with 16.1% in 2017.

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