Counties in North Dakota by population aged 18 to 64

Cass County had the highest population aged 18 to 64 of 53 counties in 2023, at 64.7%. McIntosh County had the lowest, at 46.6%. The median was 52.2% and the figure for North Dakota was 59.6%. Source: the U.S. Census Bureau.

Highest64.7Cass County

Lowest46.6McIntosh County

Median52.253 counties

North Dakota59.6History

Map of counties, 2023

Under 49
49 to 51
51 to 52
52 to 55
55 to 57
57 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	Cass County	64.7	-0.2 pts
2	Grand Forks County	64.5	-0 pts
3	Ward County	61.2	-0.4 pts
4	Williams County	61	-0.6 pts
5	McKenzie County	59.9	+0.1 pts
6	Stark County	59.2	-0.4 pts
7	Burleigh County	59	-0.3 pts
8	Stutsman County	58.4	-0.3 pts
9	Morton County	57.7	-0.7 pts
10	Richland County	57.2	-0.2 pts
11	Barnes County	56.5	-0.4 pts
12	Mountrail County	56.3	-0.4 pts
13	Billings County	55.7	-1.3 pts
14	Traill County	55.6	-0.3 pts
15	Sargent County	55.3	-0.3 pts
16	Dunn County	54.9	-0.4 pts
17	Renville County	54.7	-1 pts
18	Sioux County	54.7	+0.3 pts
19	Ransom County	54.7	-0.4 pts
20	Ramsey County	54.5	-0.4 pts
21	Mercer County	53.4	-0.7 pts
22	Burke County	53.2	-0.3 pts
23	Walsh County	53.1	-0.5 pts
24	Steele County	52.7	-0 pts
25	Foster County	52.3	-0.7 pts
26	Rolette County	52.2	+0.5 pts
27	McHenry County	52.2	-0.8 pts
28	Dickey County	52.2	-0.1 pts
29	Divide County	52	-0.2 pts
30	Bottineau County	51.9	-0.3 pts
31	Hettinger County	51.8	-0.7 pts
32	Pembina County	51.7	-0.5 pts
33	Eddy County	51.2	-0.9 pts
34	Pierce County	51.1	-0.6 pts
35	Kidder County	50.7	-0.9 pts
36	Oliver County	50.7	-0.1 pts
37	McLean County	50.5	-0.6 pts
38	Emmons County	50.2	0 pts
39	Cavalier County	49.9	-0.3 pts
40	Griggs County	49.8	-0.2 pts
41	Nelson County	49.6	+0.4 pts
42	LaMoure County	49.4	-1.1 pts
43	Wells County	49.3	-0.6 pts
44	Bowman County	49.3	-1.6 pts
45	Towner County	49.3	-0.7 pts
46	Benson County	49.1	-0.4 pts
47	Adams County	49	-0.1 pts
48	Golden Valley County	48.9	-1.3 pts
49	Logan County	48.7	-0.7 pts
50	Grant County	48.1	-1.2 pts
51	Slope County	47.2	-2 pts
52	Sheridan County	47	-0.8 pts
53	McIntosh County	46.6	-0.7 pts

Other periods

About this ranking

Residents aged 18 to 64 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.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

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 18 to 64 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 18 to 64 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 aged 18 to 64, 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 18 to 64 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 aged 18 to 64, 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-18-64/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 18 to 64 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 aged 18 to 64, 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-18-64/north-dakota-counties?period=2023.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 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 aged 18 to 64, 2023 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/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 18 to 64 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 aged 18 to 64, 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-18-64/north-dakota-counties?period=2023. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 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 18 to 64 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 aged 18 to 64, 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-18-64/north-dakota-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/north-dakota-counties?period=2023.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 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 aged 18 to 64?

Cass County, with 64.7% in 2023, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

McIntosh County, with 46.6% 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 18 to 64 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.