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

Counties in North Dakota by population aged 18 to 64

Cass County had the highest population aged 18 to 64 of 53 counties in 2021, at 65%. McIntosh County had the lowest, at 48.7%. The median was 53.1% and the figure for North Dakota was 60.2%. Source: the U.S. Census Bureau.

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Highest65Cass County
Lowest48.7McIntosh County
Median53.153 counties
North Dakota60.2History

Map of counties, 2021

Adams County: 49.1 %Barnes County: 57.2 %Benson County: 49.4 %Billings County: 57.6 %Bottineau County: 52.7 %Bowman County: 51.4 %Burke County: 54.8 %Burleigh County: 59.7 %Cass County: 65 %Cavalier County: 51.3 %Dickey County: 53.1 %Divide County: 52.3 %Dunn County: 56.1 %Eddy County: 52.1 %Emmons County: 50.6 %Foster County: 54.3 %Golden Valley County: 51.2 %Grand Forks County: 64.8 %Grant County: 49.8 %Griggs County: 49.8 %Hettinger County: 52.5 %Kidder County: 52.7 %LaMoure County: 51.7 %Logan County: 50.2 %McHenry County: 53.6 %McIntosh County: 48.7 %McKenzie County: 61 %McLean County: 51.6 %Mercer County: 54.9 %Morton County: 58.9 %Mountrail County: 57.4 %Nelson County: 50.3 %Oliver County: 52.4 %Pembina County: 53 %Pierce County: 52.3 %Ramsey County: 55.5 %Ransom County: 54.8 %Renville County: 55.6 %Richland County: 57.9 %Rolette County: 51.8 %Sargent County: 55.8 %Sheridan County: 50.5 %Sioux County: 53.4 %Slope County: 51.3 %Stark County: 60.2 %Steele County: 53.4 %Stutsman County: 59.3 %Towner County: 51.4 %Traill County: 56.6 %Walsh County: 54.3 %Ward County: 62.1 %Wells County: 50.7 %Williams County: 62.3 %
  • Under 51
  • 51 to 52
  • 52 to 53
  • 53 to 55
  • 55 to 58
  • 58 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Cass County: 65 %Cass County65Grand Forks County: 64.8 %Grand Forks County64.8Williams County: 62.3 %Williams County62.3Ward County: 62.1 %Ward County62.1McKenzie County: 61 %McKenzie County61Stark County: 60.2 %Stark County60.2Burleigh County: 59.7 %Burleigh County59.7Stutsman County: 59.3 %Stutsman County59.3Morton County: 58.9 %Morton County58.9Richland County: 57.9 %Richland County57.9Billings County: 57.6 %Billings County57.6Mountrail County: 57.4 %Mountrail County57.4Barnes County: 57.2 %Barnes County57.2Traill County: 56.6 %Traill County56.6Dunn County: 56.1 %Dunn County56.1Sargent County: 55.8 %Sargent County55.8Renville County: 55.6 %Renville County55.6Ramsey County: 55.5 %Ramsey County55.5Mercer County: 54.9 %Mercer County54.9Ransom County: 54.8 %Ransom County54.8Burke County: 54.8 %Burke County54.8Foster County: 54.3 %Foster County54.3Walsh County: 54.3 %Walsh County54.3McHenry County: 53.6 %McHenry County53.6Steele County: 53.4 %Steele County53.4Sioux County: 53.4 %Sioux County53.4Dickey County: 53.1 %Dickey County53.1Pembina County: 53 %Pembina County53Bottineau County: 52.7 %Bottineau County52.7Kidder County: 52.7 %Kidder County52.7Hettinger County: 52.5 %Hettinger County52.5Oliver County: 52.4 %Oliver County52.4Divide County: 52.3 %Divide County52.3Pierce County: 52.3 %Pierce County52.3Eddy County: 52.1 %Eddy County52.1Rolette County: 51.8 %Rolette County51.8LaMoure County: 51.7 %LaMoure County51.7McLean County: 51.6 %McLean County51.6Bowman County: 51.4 %Bowman County51.4Towner County: 51.4 %Towner County51.4Cavalier County: 51.3 %Cavalier County51.3Slope County: 51.3 %Slope County51.3Golden Valley County: 51.2 %Golden Valley County51.2Wells County: 50.7 %Wells County50.7Emmons County: 50.6 %Emmons County50.6Sheridan County: 50.5 %Sheridan County50.5Nelson County: 50.3 %Nelson County50.3Logan County: 50.2 %Logan County50.2Griggs County: 49.8 %Griggs County49.8Grant County: 49.8 %Grant County49.8Benson County: 49.4 %Benson County49.4Adams County: 49.1 %Adams County49.1McIntosh County: 48.7 %McIntosh County48.7Cass County: 65 %Cass County65Grand Forks County: 64.8 %Grand Forks County64.8Williams County: 62.3 %Williams County62.3Ward County: 62.1 %Ward County62.1McKenzie County: 61 %McKenzie County61Stark County: 60.2 %Stark County60.2Burleigh County: 59.7 %Burleigh County59.7Stutsman County: 59.3 %Stutsman County59.3Morton County: 58.9 %Morton County58.9Richland County: 57.9 %Richland County57.9Billings County: 57.6 %Billings County57.6Mountrail County: 57.4 %Mountrail County57.4Barnes County: 57.2 %Barnes County57.2Traill County: 56.6 %Traill County56.6Dunn County: 56.1 %Dunn County56.1Sargent County: 55.8 %Sargent County55.8Renville County: 55.6 %Renville County55.6Ramsey County: 55.5 %Ramsey County55.5Mercer County: 54.9 %Mercer County54.9Ransom County: 54.8 %Ransom County54.8Burke County: 54.8 %Burke County54.8Foster County: 54.3 %Foster County54.3Walsh County: 54.3 %Walsh County54.3McHenry County: 53.6 %McHenry County53.6Steele County: 53.4 %Steele County53.4Sioux County: 53.4 %Sioux County53.4Dickey County: 53.1 %Dickey County53.1Pembina County: 53 %Pembina County53Bottineau County: 52.7 %Bottineau County52.7Kidder County: 52.7 %Kidder County52.7Hettinger County: 52.5 %Hettinger County52.5Oliver County: 52.4 %Oliver County52.4Divide County: 52.3 %Divide County52.3Pierce County: 52.3 %Pierce County52.3Eddy County: 52.1 %Eddy County52.1Rolette County: 51.8 %Rolette County51.8LaMoure County: 51.7 %LaMoure County51.7McLean County: 51.6 %McLean County51.6Bowman County: 51.4 %Bowman County51.4Towner County: 51.4 %Towner County51.4Cavalier County: 51.3 %Cavalier County51.3Slope County: 51.3 %Slope County51.3Golden Valley County: 51.2 %Golden Valley County51.2Wells County: 50.7 %Wells County50.7Emmons County: 50.6 %Emmons County50.6Sheridan County: 50.5 %Sheridan County50.5Nelson County: 50.3 %Nelson County50.3Logan County: 50.2 %Logan County50.2Griggs County: 49.8 %Griggs County49.8Grant County: 49.8 %Grant County49.8Benson County: 49.4 %Benson County49.4Adams County: 49.1 %Adams County49.1McIntosh County: 48.7 %McIntosh County48.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)Change on 2020
1Cass County65+0.2 pts
2Grand Forks County64.8-0.6 pts
3Williams County62.3-1.2 pts
4Ward County62.1-0.1 pts
5McKenzie County61-0.5 pts
6Stark County60.2-0.6 pts
7Burleigh County59.7-0.3 pts
8Stutsman County59.3-0.6 pts
9Morton County58.9-0.3 pts
10Richland County57.9-0.9 pts
11Billings County57.6-1.8 pts
12Mountrail County57.4-0.8 pts
13Barnes County57.2-0.4 pts
14Traill County56.60 pts
15Dunn County56.1-1.2 pts
16Sargent County55.8-0.5 pts
17Renville County55.6-0 pts
18Ramsey County55.5-0.5 pts
19Mercer County54.9-1.1 pts
20Ransom County54.8+0.5 pts
21Burke County54.8+0.2 pts
22Foster County54.3-1.2 pts
23Walsh County54.3-0.6 pts
24McHenry County53.6-0.4 pts
25Steele County53.4-0.8 pts
26Sioux County53.4-0.9 pts
27Dickey County53.1-0.5 pts
28Pembina County53-0.8 pts
29Bottineau County52.7-0.9 pts
30Kidder County52.7-0.7 pts
31Hettinger County52.5-0.1 pts
32Oliver County52.4-1.1 pts
33Divide County52.3-1.6 pts
34Pierce County52.3-0.4 pts
35Eddy County52.1-0.1 pts
36Rolette County51.8-0.1 pts
37LaMoure County51.7+0.4 pts
38McLean County51.6-0.8 pts
39Bowman County51.4-0.9 pts
40Towner County51.4-1.3 pts
41Cavalier County51.3-0.1 pts
42Slope County51.3-2.8 pts
43Golden Valley County51.2-0.1 pts
44Wells County50.7-0.2 pts
45Emmons County50.60 pts
46Sheridan County50.5-1.1 pts
47Nelson County50.3-0.4 pts
48Logan County50.2+0.1 pts
49Griggs County49.8-0 pts
50Grant County49.8-0.3 pts
51Benson County49.4-0 pts
52Adams County49.1-1.4 pts
53McIntosh County48.7-0.7 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, 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 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, 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-18-64/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 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, 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-18-64/north-dakota-counties?period=2021.

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, 2021 [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=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 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, 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-18-64/north-dakota-counties?period=2021. 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, 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-18-64/north-dakota-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/north-dakota-counties?period=2021.
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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Rank Counties in North Dakota by population aged 18 to 64 using official data, and cite the source.
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Questions

Which county has the highest population aged 18 to 64?

Cass County, with 65% in 2021, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

McIntosh County, with 48.7% 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 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