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 2019, at 29.4%. Cook County had the lowest, at 15.7%. The median was 23.2% and the figure for Minnesota was 23.2%. Source: the U.S. Census Bureau.

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Highest29.4Mahnomen County
Lowest15.7Cook County
Median23.287 counties
Minnesota23.2History

Map of counties, 2019

Aitkin County: 16.9 %Anoka County: 24.3 %Becker County: 24.1 %Beltrami County: 25 %Benton County: 25.2 %Big Stone County: 21.3 %Blue Earth County: 20.5 %Brown County: 21.5 %Carlton County: 22.4 %Carver County: 27.3 %Cass County: 21 %Chippewa County: 23.6 %Chisago County: 23.1 %Clay County: 25.1 %Clearwater County: 24 %Cook County: 15.7 %Cottonwood County: 23.6 %Crow Wing County: 21.5 %Dakota County: 24.5 %Dodge County: 26.3 %Douglas County: 21.5 %Faribault County: 21.8 %Fillmore County: 24.2 %Freeborn County: 22 %Goodhue County: 22.5 %Grant County: 23.1 %Hennepin County: 21.5 %Houston County: 22.2 %Hubbard County: 22.1 %Isanti County: 24 %Itasca County: 21.1 %Jackson County: 22.6 %Kanabec County: 21.6 %Kandiyohi County: 24.9 %Kittson County: 21.2 %Koochiching County: 18.6 %Lac qui Parle County: 21.8 %Lake County: 19.1 %Lake of the Woods County: 18.8 %Le Sueur County: 24 %Lincoln County: 23.5 %Lyon County: 25.3 %McLeod County: 22.8 %Mahnomen County: 29.4 %Marshall County: 23.5 %Martin County: 21.8 %Meeker County: 23.7 %Mille Lacs County: 23.5 %Morrison County: 23.6 %Mower County: 25.4 %Murray County: 21.6 %Nicollet County: 22.7 %Nobles County: 27.9 %Norman County: 22.4 %Olmsted County: 23.9 %Otter Tail County: 21.7 %Pennington County: 22.5 %Pine County: 20.2 %Pipestone County: 24.6 %Polk County: 24.6 %Pope County: 21.5 %Ramsey County: 22.8 %Red Lake County: 24.7 %Redwood County: 25 %Renville County: 22.9 %Rice County: 22.2 %Rock County: 25.1 %Roseau County: 24.3 %St. Louis County: 19.1 %Scott County: 27.3 %Sherburne County: 26.5 %Sibley County: 23.2 %Stearns County: 23.6 %Steele County: 25 %Stevens County: 23.1 %Swift County: 23.2 %Todd County: 25.1 %Traverse County: 21.3 %Wabasha County: 21.5 %Wadena County: 24.7 %Waseca County: 23.2 %Washington County: 24.6 %Watonwan County: 24.9 %Wilkin County: 23.5 %Winona County: 18.8 %Wright County: 28.3 %Yellow Medicine County: 23 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 24
  • 24 to 25
  • 25 and over
%, 2019. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2019

Mahnomen County: 29.4 %Mahnomen County29.4Wright County: 28.3 %Wright County28.3Nobles County: 27.9 %Nobles County27.9Scott County: 27.3 %Scott County27.3Carver County: 27.3 %Carver County27.3Sherburne County: 26.5 %Sherburne County26.5Dodge County: 26.3 %Dodge County26.3Mower County: 25.4 %Mower County25.4Lyon County: 25.3 %Lyon County25.3Benton County: 25.2 %Benton County25.2Todd County: 25.1 %Todd County25.1Clay County: 25.1 %Clay County25.1Rock County: 25.1 %Rock County25.1Steele County: 25 %Steele County25Redwood County: 25 %Redwood County25Beltrami County: 25 %Beltrami County25Kandiyohi County: 24.9 %Kandiyohi County24.9Watonwan County: 24.9 %Watonwan County24.9Red Lake County: 24.7 %Red Lake County24.7Wadena County: 24.7 %Wadena County24.7Washington County: 24.6 %Washington County24.6Polk County: 24.6 %Polk County24.6Pipestone County: 24.6 %Pipestone County24.6Dakota County: 24.5 %Dakota County24.5Roseau County: 24.3 %Roseau County24.3Anoka County: 24.3 %Anoka County24.3Fillmore County: 24.2 %Fillmore County24.2Becker County: 24.1 %Becker County24.1Le Sueur County: 24 %Le Sueur County24Isanti County: 24 %Isanti County24Clearwater County: 24 %Clearwater County24Olmsted County: 23.9 %Olmsted County23.9Meeker County: 23.7 %Meeker County23.7Morrison County: 23.6 %Morrison County23.6Stearns County: 23.6 %Stearns County23.6Chippewa County: 23.6 %Chippewa County23.6Cottonwood County: 23.6 %Cottonwood County23.6Mille Lacs County: 23.5 %Mille Lacs County23.5Marshall County: 23.5 %Marshall County23.5Lincoln County: 23.5 %Lincoln County23.5Mahnomen County: 29.4 %Mahnomen County29.4Wright County: 28.3 %Wright County28.3Nobles County: 27.9 %Nobles County27.9Scott County: 27.3 %Scott County27.3Carver County: 27.3 %Carver County27.3Sherburne County: 26.5 %Sherburne County26.5Dodge County: 26.3 %Dodge County26.3Mower County: 25.4 %Mower County25.4Lyon County: 25.3 %Lyon County25.3Benton County: 25.2 %Benton County25.2Todd County: 25.1 %Todd County25.1Clay County: 25.1 %Clay County25.1Rock County: 25.1 %Rock County25.1Steele County: 25 %Steele County25Redwood County: 25 %Redwood County25Beltrami County: 25 %Beltrami County25Kandiyohi County: 24.9 %Kandiyohi County24.9Watonwan County: 24.9 %Watonwan County24.9Red Lake County: 24.7 %Red Lake County24.7Wadena County: 24.7 %Wadena County24.7Washington County: 24.6 %Washington County24.6Polk County: 24.6 %Polk County24.6Pipestone County: 24.6 %Pipestone County24.6Dakota County: 24.5 %Dakota County24.5Roseau County: 24.3 %Roseau County24.3Anoka County: 24.3 %Anoka County24.3Fillmore County: 24.2 %Fillmore County24.2Becker County: 24.1 %Becker County24.1Le Sueur County: 24 %Le Sueur County24Isanti County: 24 %Isanti County24Clearwater County: 24 %Clearwater County24Olmsted County: 23.9 %Olmsted County23.9Meeker County: 23.7 %Meeker County23.7Morrison County: 23.6 %Morrison County23.6Stearns County: 23.6 %Stearns County23.6Chippewa County: 23.6 %Chippewa County23.6Cottonwood County: 23.6 %Cottonwood County23.6Mille Lacs County: 23.5 %Mille Lacs County23.5Marshall County: 23.5 %Marshall County23.5Lincoln County: 23.5 %Lincoln County23.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2019 (%)Change on 2018
1Mahnomen County29.4-0.4 pts
2Wright County28.3-0.1 pts
3Nobles County27.9+0.4 pts
4Scott County27.3-0.4 pts
5Carver County27.3-0.3 pts
6Sherburne County26.5-0.3 pts
7Dodge County26.3-0.1 pts
8Mower County25.4+0.1 pts
9Lyon County25.3-0.1 pts
10Benton County25.2+0.1 pts
11Todd County25.1+0.2 pts
12Clay County25.1+0.1 pts
13Rock County25.1-0.7 pts
14Steele County25-0.1 pts
15Redwood County25+0.1 pts
16Beltrami County25+0.1 pts
17Kandiyohi County24.9+0.1 pts
18Watonwan County24.9-0 pts
19Red Lake County24.70 pts
20Wadena County24.7+0.2 pts
21Washington County24.6-0.2 pts
22Polk County24.6+0.3 pts
23Pipestone County24.6-0.3 pts
24Dakota County24.5-0.1 pts
25Roseau County24.3+0.2 pts
26Anoka County24.3-0.1 pts
27Fillmore County24.2-0 pts
28Becker County24.1-0.2 pts
29Le Sueur County24-0.2 pts
30Isanti County24+0.1 pts
31Clearwater County24-0.2 pts
32Olmsted County23.9-0.1 pts
33Meeker County23.7-0.2 pts
34Morrison County23.60 pts
35Stearns County23.6+0.2 pts
36Chippewa County23.6+0.2 pts
37Cottonwood County23.6-0 pts
38Mille Lacs County23.5-0.4 pts
39Marshall County23.5+0.1 pts
40Lincoln County23.5-0.1 pts
41Wilkin County23.50 pts
42Swift County23.2+0.1 pts
43Sibley County23.2-0.5 pts
44Waseca County23.20 pts
45Stevens County23.1+0.4 pts
46Grant County23.1+0.3 pts
47Chisago County23.10 pts
48Yellow Medicine County23-0.3 pts
49Renville County22.9+0.1 pts
50Ramsey County22.8-0.2 pts
51McLeod County22.8-0.1 pts
52Nicollet County22.7-0.2 pts
53Jackson County22.6+0.1 pts
54Goodhue County22.5-0 pts
55Pennington County22.5-0.3 pts
56Norman County22.4-0.6 pts
57Carlton County22.4-0.2 pts
58Houston County22.2-0 pts
59Rice County22.2-0.1 pts
60Hubbard County22.1+0.1 pts
61Freeborn County22-0.1 pts
62Faribault County21.8-0.1 pts
62Lac qui Parle County21.8+0.6 pts
64Martin County21.8+0.1 pts
65Otter Tail County21.7-0 pts
66Murray County21.6-0.3 pts
67Kanabec County21.6-0.3 pts
68Douglas County21.5-0.1 pts
69Crow Wing County21.5-0.3 pts
70Hennepin County21.5-0.2 pts
71Brown County21.5-0.1 pts
72Pope County21.5+0.2 pts
73Wabasha County21.5-0.1 pts
74Traverse County21.3-0.2 pts
75Big Stone County21.3+0.1 pts
76Kittson County21.2-0.1 pts
77Itasca County21.1-0.1 pts
78Cass County21-0.3 pts
79Blue Earth County20.5+0.2 pts
80Pine County20.2-0.3 pts
81St. Louis County19.1-0.1 pts
82Lake County19.1+0.3 pts
83Winona County18.8-0.1 pts
84Lake of the Woods County18.8+0.5 pts
85Koochiching County18.6-0.4 pts
86Aitkin County16.9-0.1 pts
87Cook County15.7-0.5 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, 2019) [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, 2019. 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=2019. 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, 2019. 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=2019.

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, 2019 [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=2019 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_minnesota_by_2019,
  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, 2019}},
  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=2019. 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, 2019
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=2019
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/minnesota-counties?period=2019.
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 2019, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Cook County, with 15.7% in 2019.

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