Data / Rankings / Population under 18 / Counties in North Dakota

Counties in North Dakota by population under 18

Sioux County had the highest population under 18 of 53 counties in 2021, at 36.1%. Nelson County had the lowest, at 18.3%. The median was 22.9% and the figure for North Dakota was 23.4%. Source: the U.S. Census Bureau.

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Highest36.1Sioux County
Lowest18.3Nelson County
Median22.953 counties
North Dakota23.4History

Map of counties, 2021

Adams County: 20.7 %Barnes County: 19.6 %Benson County: 34.7 %Billings County: 21.1 %Bottineau County: 22.1 %Bowman County: 23.1 %Burke County: 24 %Burleigh County: 23 %Cass County: 22.2 %Cavalier County: 21.3 %Dickey County: 24.7 %Divide County: 23.5 %Dunn County: 26.4 %Eddy County: 23.1 %Emmons County: 20.6 %Foster County: 22.9 %Golden Valley County: 24.4 %Grand Forks County: 21.2 %Grant County: 19.5 %Griggs County: 20.7 %Hettinger County: 21.6 %Kidder County: 21.6 %LaMoure County: 22.7 %Logan County: 23.2 %McHenry County: 23.9 %McIntosh County: 19.9 %McKenzie County: 29.7 %McLean County: 22.3 %Mercer County: 23.4 %Morton County: 23.6 %Mountrail County: 28.7 %Nelson County: 18.3 %Oliver County: 24.9 %Pembina County: 21.3 %Pierce County: 22.1 %Ramsey County: 23.4 %Ransom County: 23.9 %Renville County: 22.2 %Richland County: 22.3 %Rolette County: 34.1 %Sargent County: 21.4 %Sheridan County: 19.1 %Sioux County: 36.1 %Slope County: 20.9 %Stark County: 26 %Steele County: 21.8 %Stutsman County: 20.4 %Towner County: 23 %Traill County: 23 %Walsh County: 22.9 %Ward County: 24.4 %Wells County: 20 %Williams County: 27.8 %
  • Under 21
  • 21 to 22
  • 22 to 23
  • 23 to 25
  • 25 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Sioux County: 36.1 %Sioux County36.1Benson County: 34.7 %Benson County34.7Rolette County: 34.1 %Rolette County34.1McKenzie County: 29.7 %McKenzie County29.7Mountrail County: 28.7 %Mountrail County28.7Williams County: 27.8 %Williams County27.8Dunn County: 26.4 %Dunn County26.4Stark County: 26 %Stark County26Oliver County: 24.9 %Oliver County24.9Dickey County: 24.7 %Dickey County24.7Golden Valley County: 24.4 %Golden Valley County24.4Ward County: 24.4 %Ward County24.4Burke County: 24 %Burke County24McHenry County: 23.9 %McHenry County23.9Ransom County: 23.9 %Ransom County23.9Morton County: 23.6 %Morton County23.6Divide County: 23.5 %Divide County23.5Mercer County: 23.4 %Mercer County23.4Ramsey County: 23.4 %Ramsey County23.4Logan County: 23.2 %Logan County23.2Eddy County: 23.1 %Eddy County23.1Bowman County: 23.1 %Bowman County23.1Towner County: 23 %Towner County23Traill County: 23 %Traill County23Burleigh County: 23 %Burleigh County23Foster County: 22.9 %Foster County22.9Walsh County: 22.9 %Walsh County22.9LaMoure County: 22.7 %LaMoure County22.7McLean County: 22.3 %McLean County22.3Richland County: 22.3 %Richland County22.3Cass County: 22.2 %Cass County22.2Renville County: 22.2 %Renville County22.2Bottineau County: 22.1 %Bottineau County22.1Pierce County: 22.1 %Pierce County22.1Steele County: 21.8 %Steele County21.8Kidder County: 21.6 %Kidder County21.6Hettinger County: 21.6 %Hettinger County21.6Sargent County: 21.4 %Sargent County21.4Cavalier County: 21.3 %Cavalier County21.3Pembina County: 21.3 %Pembina County21.3Grand Forks County: 21.2 %Grand Forks County21.2Billings County: 21.1 %Billings County21.1Slope County: 20.9 %Slope County20.9Griggs County: 20.7 %Griggs County20.7Adams County: 20.7 %Adams County20.7Emmons County: 20.6 %Emmons County20.6Stutsman County: 20.4 %Stutsman County20.4Wells County: 20 %Wells County20McIntosh County: 19.9 %McIntosh County19.9Barnes County: 19.6 %Barnes County19.6Grant County: 19.5 %Grant County19.5Sheridan County: 19.1 %Sheridan County19.1Nelson County: 18.3 %Nelson County18.3Sioux County: 36.1 %Sioux County36.1Benson County: 34.7 %Benson County34.7Rolette County: 34.1 %Rolette County34.1McKenzie County: 29.7 %McKenzie County29.7Mountrail County: 28.7 %Mountrail County28.7Williams County: 27.8 %Williams County27.8Dunn County: 26.4 %Dunn County26.4Stark County: 26 %Stark County26Oliver County: 24.9 %Oliver County24.9Dickey County: 24.7 %Dickey County24.7Golden Valley County: 24.4 %Golden Valley County24.4Ward County: 24.4 %Ward County24.4Burke County: 24 %Burke County24McHenry County: 23.9 %McHenry County23.9Ransom County: 23.9 %Ransom County23.9Morton County: 23.6 %Morton County23.6Divide County: 23.5 %Divide County23.5Mercer County: 23.4 %Mercer County23.4Ramsey County: 23.4 %Ramsey County23.4Logan County: 23.2 %Logan County23.2Eddy County: 23.1 %Eddy County23.1Bowman County: 23.1 %Bowman County23.1Towner County: 23 %Towner County23Traill County: 23 %Traill County23Burleigh County: 23 %Burleigh County23Foster County: 22.9 %Foster County22.9Walsh County: 22.9 %Walsh County22.9LaMoure County: 22.7 %LaMoure County22.7McLean County: 22.3 %McLean County22.3Richland County: 22.3 %Richland County22.3Cass County: 22.2 %Cass County22.2Renville County: 22.2 %Renville County22.2Bottineau County: 22.1 %Bottineau County22.1Pierce County: 22.1 %Pierce County22.1Steele County: 21.8 %Steele County21.8Kidder County: 21.6 %Kidder County21.6Hettinger County: 21.6 %Hettinger County21.6Sargent County: 21.4 %Sargent County21.4Cavalier County: 21.3 %Cavalier County21.3Pembina County: 21.3 %Pembina County21.3Grand Forks County: 21.2 %Grand Forks County21.2Billings County: 21.1 %Billings County21.1Slope County: 20.9 %Slope County20.9Griggs County: 20.7 %Griggs County20.7Adams County: 20.7 %Adams County20.7Emmons County: 20.6 %Emmons County20.6Stutsman County: 20.4 %Stutsman County20.4Wells County: 20 %Wells County20McIntosh County: 19.9 %McIntosh County19.9Barnes County: 19.6 %Barnes County19.6Grant County: 19.5 %Grant County19.5Sheridan County: 19.1 %Sheridan County19.1Nelson County: 18.3 %Nelson County18.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1Sioux County36.1+0.4 pts
2Benson County34.7-0.6 pts
3Rolette County34.10 pts
4McKenzie County29.7-0.3 pts
5Mountrail County28.7+0.2 pts
6Williams County27.8+0.1 pts
7Dunn County26.4+0.4 pts
8Stark County26-0 pts
9Oliver County24.9+0.1 pts
10Dickey County24.7+0.1 pts
11Golden Valley County24.4-0 pts
12Ward County24.4-0.1 pts
13Burke County24-0.8 pts
14McHenry County23.9+0.3 pts
15Ransom County23.9-0.3 pts
16Morton County23.6+0.1 pts
17Divide County23.5+0.4 pts
18Mercer County23.4-0.2 pts
19Ramsey County23.4+0.2 pts
20Logan County23.2-0.3 pts
21Eddy County23.1+1 pts
22Bowman County23.1-0.6 pts
23Towner County23+1.1 pts
24Traill County23-0.1 pts
25Burleigh County23-0.2 pts
26Foster County22.9+0.8 pts
27Walsh County22.9+0.1 pts
28LaMoure County22.7-0.3 pts
29McLean County22.30 pts
30Richland County22.3+0.1 pts
31Cass County22.2-0.3 pts
32Renville County22.2+0.1 pts
33Bottineau County22.1+0.6 pts
34Pierce County22.1+0.2 pts
35Steele County21.8+0.3 pts
36Kidder County21.6-0.1 pts
37Hettinger County21.6-0.3 pts
38Sargent County21.4+0.1 pts
39Cavalier County21.3-0.2 pts
40Pembina County21.3+0.2 pts
41Grand Forks County21.2+0.1 pts
42Billings County21.1+0.6 pts
43Slope County20.9-0.2 pts
44Griggs County20.7+0.4 pts
45Adams County20.7+0.4 pts
46Emmons County20.6-0.2 pts
47Stutsman County20.4+0.4 pts
48Wells County20-0.3 pts
49McIntosh County19.9+1.4 pts
50Barnes County19.6+0.1 pts
51Grant County19.5+0.9 pts
52Sheridan County19.1+0.7 pts
53Nelson County18.3+0.7 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 North Dakota by population under 18, 2021) [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 North Dakota by population under 18, 2021. 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/north-dakota-counties?period=2021. 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 North Dakota by population under 18, 2021. 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/north-dakota-counties?period=2021.

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 North Dakota by population under 18, 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/north-dakota-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_north_dakota_2021,
  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 North Dakota by population under 18, 2021}},
  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/north-dakota-counties?period=2021. 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 North Dakota by population under 18, 2021
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/north-dakota-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/north-dakota-counties?period=2021.
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?

Sioux County, with 36.1% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Nelson County, with 18.3% in 2021.

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 North Dakota: more rankings