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

Counties in North Dakota by population under 18, 2025

Sioux County had the highest population under 18 of 53 counties in 2025, at 32.9%. Slope County had the lowest, at 17.4%. The median was 22.7% and the figure for North Dakota was 22.9%. Source: the U.S. Census Bureau.

Highest32.9Sioux County
Lowest17.4Slope County
Median22.753 counties
North Dakota22.9History

All counties, 2025

Sioux County: 32.9 %Sioux County32.9Benson County: 32.9 %Benson County32.9Rolette County: 32.1 %Rolette County32.1McKenzie County: 30.3 %McKenzie County30.3Mountrail County: 28.7 %Mountrail County28.7Williams County: 28.4 %Williams County28.4Dunn County: 26.1 %Dunn County26.1Stark County: 26 %Stark County26Eddy County: 25.4 %Eddy County25.4Dickey County: 24.7 %Dickey County24.7Golden Valley County: 24.6 %Golden Valley County24.6Burke County: 24.3 %Burke County24.3Logan County: 23.8 %Logan County23.8Ramsey County: 23.8 %Ramsey County23.8McHenry County: 23.8 %McHenry County23.8Towner County: 23.7 %Towner County23.7Ward County: 23.5 %Ward County23.5Morton County: 23.4 %Morton County23.4LaMoure County: 23.4 %LaMoure County23.4Walsh County: 23.2 %Walsh County23.2Mercer County: 23.2 %Mercer County23.2Divide County: 23.1 %Divide County23.1Kidder County: 23.1 %Kidder County23.1Oliver County: 22.9 %Oliver County22.9Renville County: 22.9 %Renville County22.9Bowman County: 22.8 %Bowman County22.8Cavalier County: 22.7 %Cavalier County22.7Traill County: 22.4 %Traill County22.4Ransom County: 22.4 %Ransom County22.4Foster County: 22.2 %Foster County22.2Pierce County: 22.1 %Pierce County22.1Hettinger County: 22 %Hettinger County22Burleigh County: 21.9 %Burleigh County21.9Steele County: 21.7 %Steele County21.7Pembina County: 21.6 %Pembina County21.6Cass County: 21.5 %Cass County21.5Billings County: 21.5 %Billings County21.5McLean County: 21.2 %McLean County21.2Sheridan County: 21.2 %Sheridan County21.2Richland County: 21.1 %Richland County21.1Wells County: 20.9 %Wells County20.9Bottineau County: 20.7 %Bottineau County20.7Emmons County: 20.6 %Emmons County20.6Grand Forks County: 20.5 %Grand Forks County20.5McIntosh County: 20.3 %McIntosh County20.3Sargent County: 20.2 %Sargent County20.2Adams County: 19.9 %Adams County19.9Griggs County: 19.7 %Griggs County19.7Grant County: 19.6 %Grant County19.6Stutsman County: 19.5 %Stutsman County19.5Barnes County: 19 %Barnes County19Nelson County: 17.9 %Nelson County17.9Slope County: 17.4 %Slope County17.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2025 (%)Change on 2024
1Sioux County32.9-1 pts
2Benson County32.9-0.1 pts
3Rolette County32.1-0.6 pts
4McKenzie County30.30 pts
5Mountrail County28.7+0.2 pts
6Williams County28.4+0.1 pts
7Dunn County26.1+0.2 pts
8Stark County26-0 pts
9Eddy County25.4+0.1 pts
10Dickey County24.7-0.4 pts
11Golden Valley County24.6+1.1 pts
12Burke County24.3+0.3 pts
13Logan County23.8+0.4 pts
14Ramsey County23.8-0 pts
15McHenry County23.8-0.4 pts
16Towner County23.7+0.6 pts
17Ward County23.5-0.3 pts
18Morton County23.4-0.1 pts
19LaMoure County23.4+0.1 pts
20Walsh County23.2+0.1 pts
21Mercer County23.2-0.2 pts
22Divide County23.1-0.3 pts
23Kidder County23.1+0.1 pts
24Oliver County22.9-0.8 pts
25Renville County22.9-0.2 pts
26Bowman County22.8-0.6 pts
27Cavalier County22.7+0.2 pts
28Traill County22.4-0.6 pts
29Ransom County22.4-0.3 pts
30Foster County22.2-0.6 pts
31Pierce County22.1+0.3 pts
32Hettinger County22-0.2 pts
33Burleigh County21.9-0.3 pts
34Steele County21.7+0.5 pts
35Pembina County21.6+0.2 pts
36Cass County21.5-0.2 pts
37Billings County21.5+0.5 pts
38McLean County21.2-0.2 pts
39Sheridan County21.2+0.5 pts
40Richland County21.10 pts
41Wells County20.9+0.2 pts
42Bottineau County20.7-0.7 pts
43Emmons County20.6+0.1 pts
44Grand Forks County20.5-0 pts
45McIntosh County20.3-0.2 pts
46Sargent County20.2+0.2 pts
47Adams County19.9+0.6 pts
48Griggs County19.7-0.2 pts
49Grant County19.6-0.2 pts
50Stutsman County19.5-0.2 pts
51Barnes County19-0.2 pts
52Nelson County17.9-0.1 pts
53Slope County17.4-1.3 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 North Dakota by population under 18, 2025) [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, 2025. 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. 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, 2025. 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.

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, 2025 [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 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_north_dakota_2025,
  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, 2025}},
  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. 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, 2025
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
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/north-dakota-counties.
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 32.9% in 2025, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Slope County, with 17.4% in 2025.

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