Data / Rankings / Population aged 18 to 64 / Counties in North Dakota

Counties in North Dakota by population aged 18 to 64, 2025

Cass County had the highest population aged 18 to 64 of 53 counties in 2025, at 64.5%. McIntosh County had the lowest, at 45.4%. The median was 51.6% and the figure for North Dakota was 59.2%. Source: the U.S. Census Bureau.

Highest64.5Cass County
Lowest45.4McIntosh County
Median51.653 counties
North Dakota59.2History

All counties, 2025

Cass County: 64.5 %Cass County64.5Grand Forks County: 64.1 %Grand Forks County64.1Ward County: 60.9 %Ward County60.9Williams County: 60.5 %Williams County60.5McKenzie County: 59.2 %McKenzie County59.2Burleigh County: 58.7 %Burleigh County58.7Stark County: 58.4 %Stark County58.4Stutsman County: 58 %Stutsman County58Morton County: 57.3 %Morton County57.3Richland County: 56.7 %Richland County56.7Barnes County: 56.3 %Barnes County56.3Traill County: 55.5 %Traill County55.5Sioux County: 55.5 %Sioux County55.5Dunn County: 55.3 %Dunn County55.3Mountrail County: 55.1 %Mountrail County55.1Ransom County: 54.4 %Ransom County54.4Billings County: 53.9 %Billings County53.9Renville County: 53.5 %Renville County53.5Ramsey County: 53.2 %Ramsey County53.2Dickey County: 53.1 %Dickey County53.1Sargent County: 53.1 %Sargent County53.1Walsh County: 52.9 %Walsh County52.9Rolette County: 52.6 %Rolette County52.6Mercer County: 52 %Mercer County52Bottineau County: 51.8 %Bottineau County51.8Foster County: 51.7 %Foster County51.7McHenry County: 51.6 %McHenry County51.6Burke County: 51.6 %Burke County51.6Divide County: 51 %Divide County51Pierce County: 51 %Pierce County51Hettinger County: 50.9 %Hettinger County50.9Pembina County: 50.7 %Pembina County50.7Steele County: 50.5 %Steele County50.5Eddy County: 50 %Eddy County50McLean County: 49.9 %McLean County49.9Cavalier County: 49.5 %Cavalier County49.5Oliver County: 49.3 %Oliver County49.3Towner County: 49.2 %Towner County49.2Benson County: 49.2 %Benson County49.2Adams County: 49.1 %Adams County49.1Griggs County: 49.1 %Griggs County49.1Wells County: 49.1 %Wells County49.1Kidder County: 49 %Kidder County49Emmons County: 48.8 %Emmons County48.8Bowman County: 48.8 %Bowman County48.8Nelson County: 48.8 %Nelson County48.8LaMoure County: 48.1 %LaMoure County48.1Logan County: 47.6 %Logan County47.6Golden Valley County: 47.2 %Golden Valley County47.2Grant County: 46.9 %Grant County46.9Sheridan County: 46.2 %Sheridan County46.2Slope County: 45.9 %Slope County45.9McIntosh County: 45.4 %McIntosh County45.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2025 (%)Change on 2024
1Cass County64.5-0.1 pts
2Grand Forks County64.1-0.2 pts
3Ward County60.9-0.2 pts
4Williams County60.5-0.3 pts
5McKenzie County59.2-0.4 pts
6Burleigh County58.7-0.2 pts
7Stark County58.4-0.4 pts
8Stutsman County58-0.1 pts
9Morton County57.3-0.2 pts
10Richland County56.7-0.5 pts
11Barnes County56.3-0.4 pts
12Traill County55.5+0.2 pts
13Sioux County55.5+0.3 pts
14Dunn County55.3+0.2 pts
15Mountrail County55.1-0.8 pts
16Ransom County54.4-0.2 pts
17Billings County53.9-1 pts
18Renville County53.5-0.3 pts
19Ramsey County53.2-0.5 pts
20Dickey County53.1+0.7 pts
21Sargent County53.1-1 pts
22Walsh County52.9-0 pts
23Rolette County52.6+0.3 pts
24Mercer County52-0.5 pts
25Bottineau County51.8-0.2 pts
26Foster County51.7-0.1 pts
27McHenry County51.6-0 pts
28Burke County51.6-1 pts
29Divide County51-0.3 pts
30Pierce County51-0.3 pts
31Hettinger County50.9-0.3 pts
32Pembina County50.7-0.3 pts
33Steele County50.5-1.3 pts
34Eddy County50-0.3 pts
35McLean County49.9-0.4 pts
36Cavalier County49.5-0.1 pts
37Oliver County49.3-0.2 pts
38Towner County49.2-0.4 pts
39Benson County49.2-0.4 pts
40Adams County49.1-0.3 pts
41Griggs County49.1-0 pts
42Wells County49.1-0 pts
43Kidder County49-0.6 pts
44Emmons County48.8-0.8 pts
45Bowman County48.8-0.2 pts
46Nelson County48.8-0.1 pts
47LaMoure County48.1-0.2 pts
48Logan County47.6-1.3 pts
49Golden Valley County47.2-1.5 pts
50Grant County46.9-0.5 pts
51Sheridan County46.2-0.1 pts
52Slope County45.9-0.6 pts
53McIntosh County45.4-1.1 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, 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 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, 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-18-64/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 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, 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-18-64/north-dakota-counties.

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, 2025 [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 (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 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, 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-18-64/north-dakota-counties. 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, 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-18-64/north-dakota-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/north-dakota-counties.
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 64.5% in 2025, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

McIntosh County, with 45.4% 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 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.

Population aged 18 to 64: other rankings

Counties in North Dakota: more rankings