Counties in North Dakota by population under 18

Sioux County had the highest population under 18 of 53 counties in 2023, at 34.5%. Nelson County had the lowest, at 17.9%. The median was 22.9% and the figure for North Dakota was 23.2%. Source: the U.S. Census Bureau.

Highest34.5Sioux County

Lowest17.9Nelson County

Median22.953 counties

North Dakota23.2History

Map of counties, 2023

Under 21
21 to 22
22 to 23
23 to 24
24 to 25
25 and over

%, 2023. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2023

%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2023 (%)	Change on 2022
1	Sioux County	34.5	-0.5 pts
2	Benson County	34	-0.2 pts
3	Rolette County	33.2	-0.7 pts
4	McKenzie County	30.2	-0.2 pts
5	Mountrail County	28.4	-0 pts
6	Williams County	28.3	+0.4 pts
7	Dunn County	26.4	-0.1 pts
8	Stark County	25.9	-0.1 pts
9	Dickey County	25.2	-0.2 pts
10	Eddy County	24.2	+0.5 pts
11	Ward County	24.2	-0.2 pts
12	Logan County	24.1	+0.9 pts
13	Burke County	23.9	-0 pts
14	Golden Valley County	23.7	-0.4 pts
15	Oliver County	23.7	-0.7 pts
16	McHenry County	23.7	+0.2 pts
17	Morton County	23.7	+0.1 pts
18	Ramsey County	23.6	+0.1 pts
19	Bowman County	23.5	+0.3 pts
20	Towner County	23.4	+0.7 pts
21	Mercer County	23.4	+0.1 pts
22	Divide County	23.1	-0 pts
23	Ransom County	23.1	-0.2 pts
24	LaMoure County	23	+0.2 pts
25	Walsh County	22.9	+0.1 pts
26	Foster County	22.9	-0.7 pts
27	Traill County	22.9	-0.3 pts
28	Burleigh County	22.6	-0.3 pts
29	Renville County	22.4	+0.5 pts
30	Kidder County	22.3	-0 pts
31	Cavalier County	22.2	+0.5 pts
32	Hettinger County	22.1	+0.3 pts
33	Pierce County	22	-0.1 pts
34	Bottineau County	22	-0.2 pts
35	Cass County	22	-0.1 pts
36	Steele County	21.6	-0.2 pts
37	Richland County	21.5	-0.4 pts
38	Billings County	21.5	+0.1 pts
39	McLean County	21.5	-0.3 pts
40	Slope County	21.3	-0.3 pts
41	McIntosh County	21.2	+0.7 pts
42	Pembina County	21.2	-0.2 pts
43	Sheridan County	21	+0.8 pts
44	Grand Forks County	20.7	-0.2 pts
45	Emmons County	20.6	0 pts
46	Wells County	20.6	+0.1 pts
47	Sargent County	20.2	-0.9 pts
48	Grant County	20	+0.9 pts
49	Stutsman County	20	-0.2 pts
50	Griggs County	20	-0.3 pts
51	Adams County	19.9	+0.2 pts
52	Barnes County	19.6	0 pts
53	Nelson County	17.9	-0.6 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, 2023) [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, 2023. 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=2023. 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, 2023. 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=2023.

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, 2023 [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=2023 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_north_dakota_2023,
  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, 2023}},
  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=2023. 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, 2023
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=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/north-dakota-counties?period=2023.
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 34.5% in 2023, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Nelson County, with 17.9% in 2023.

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.