Data / Rankings / Uninsured rate, ages 35 to 64 (US, ACS) / Counties in North Dakota

Counties in North Dakota by uninsured rate, ages 35 to 64 (US, ACS)

Rolette County had the highest uninsured rate, ages 35 to 64 (US, ACS) of 53 counties in 2021, at 34.6%. Slope County had the lowest, at 1.8%. The median was 7.8% and the figure for North Dakota was 7.8%. Source: the U.S. Census Bureau.

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Highest34.6Rolette County
Lowest1.8Slope County
Median7.853 counties
North Dakota7.8History

Map of counties, 2021

Adams County: 8.8 %Barnes County: 7.8 %Benson County: 10.2 %Billings County: 6.7 %Bottineau County: 8.3 %Bowman County: 8.1 %Burke County: 5.8 %Burleigh County: 5.1 %Cass County: 6.1 %Cavalier County: 11.5 %Dickey County: 5.7 %Divide County: 13.8 %Dunn County: 11.2 %Eddy County: 7.6 %Emmons County: 9.7 %Foster County: 3.1 %Golden Valley County: 4.1 %Grand Forks County: 5 %Grant County: 6.7 %Griggs County: 9.7 %Hettinger County: 6.6 %Kidder County: 8.4 %LaMoure County: 8.1 %Logan County: 3.7 %McHenry County: 4.8 %McIntosh County: 5.1 %McKenzie County: 13.9 %McLean County: 4.1 %Mercer County: 13 %Morton County: 6.7 %Mountrail County: 20.2 %Nelson County: 10.1 %Oliver County: 10.5 %Pembina County: 7.3 %Pierce County: 4.3 %Ramsey County: 8.2 %Ransom County: 4 %Renville County: 2.8 %Richland County: 6.8 %Rolette County: 34.6 %Sargent County: 2.6 %Sheridan County: 12.1 %Sioux County: 34.1 %Slope County: 1.8 %Stark County: 9.8 %Steele County: 8.6 %Stutsman County: 8.9 %Towner County: 7.8 %Traill County: 7.1 %Walsh County: 8.5 %Ward County: 6.8 %Wells County: 10.1 %Williams County: 13.3 %
  • Under 4.6
  • 4.6 to 6.7
  • 6.7 to 7.8
  • 7.8 to 8.8
  • 8.8 to 11
  • 11 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Rolette County: 34.6 %Rolette County34.6Sioux County: 34.1 %Sioux County34.1Mountrail County: 20.2 %Mountrail County20.2McKenzie County: 13.9 %McKenzie County13.9Divide County: 13.8 %Divide County13.8Williams County: 13.3 %Williams County13.3Mercer County: 13 %Mercer County13Sheridan County: 12.1 %Sheridan County12.1Cavalier County: 11.5 %Cavalier County11.5Dunn County: 11.2 %Dunn County11.2Oliver County: 10.5 %Oliver County10.5Benson County: 10.2 %Benson County10.2Wells County: 10.1 %Wells County10.1Nelson County: 10.1 %Nelson County10.1Stark County: 9.8 %Stark County9.8Emmons County: 9.7 %Emmons County9.7Griggs County: 9.7 %Griggs County9.7Stutsman County: 8.9 %Stutsman County8.9Adams County: 8.8 %Adams County8.8Steele County: 8.6 %Steele County8.6Walsh County: 8.5 %Walsh County8.5Kidder County: 8.4 %Kidder County8.4Bottineau County: 8.3 %Bottineau County8.3Ramsey County: 8.2 %Ramsey County8.2LaMoure County: 8.1 %LaMoure County8.1Bowman County: 8.1 %Bowman County8.1Barnes County: 7.8 %Barnes County7.8Towner County: 7.8 %Towner County7.8Eddy County: 7.6 %Eddy County7.6Pembina County: 7.3 %Pembina County7.3Traill County: 7.1 %Traill County7.1Richland County: 6.8 %Richland County6.8Ward County: 6.8 %Ward County6.8Billings County: 6.7 %Billings County6.7Morton County: 6.7 %Morton County6.7Grant County: 6.7 %Grant County6.7Hettinger County: 6.6 %Hettinger County6.6Cass County: 6.1 %Cass County6.1Burke County: 5.8 %Burke County5.8Dickey County: 5.7 %Dickey County5.7Burleigh County: 5.1 %Burleigh County5.1McIntosh County: 5.1 %McIntosh County5.1Grand Forks County: 5 %Grand Forks County5McHenry County: 4.8 %McHenry County4.8Pierce County: 4.3 %Pierce County4.3Golden Valley County: 4.1 %Golden Valley County4.1McLean County: 4.1 %McLean County4.1Ransom County: 4 %Ransom County4Logan County: 3.7 %Logan County3.7Foster County: 3.1 %Foster County3.1Renville County: 2.8 %Renville County2.8Sargent County: 2.6 %Sargent County2.6Slope County: 1.8 %Slope County1.8Rolette County: 34.6 %Rolette County34.6Sioux County: 34.1 %Sioux County34.1Mountrail County: 20.2 %Mountrail County20.2McKenzie County: 13.9 %McKenzie County13.9Divide County: 13.8 %Divide County13.8Williams County: 13.3 %Williams County13.3Mercer County: 13 %Mercer County13Sheridan County: 12.1 %Sheridan County12.1Cavalier County: 11.5 %Cavalier County11.5Dunn County: 11.2 %Dunn County11.2Oliver County: 10.5 %Oliver County10.5Benson County: 10.2 %Benson County10.2Wells County: 10.1 %Wells County10.1Nelson County: 10.1 %Nelson County10.1Stark County: 9.8 %Stark County9.8Emmons County: 9.7 %Emmons County9.7Griggs County: 9.7 %Griggs County9.7Stutsman County: 8.9 %Stutsman County8.9Adams County: 8.8 %Adams County8.8Steele County: 8.6 %Steele County8.6Walsh County: 8.5 %Walsh County8.5Kidder County: 8.4 %Kidder County8.4Bottineau County: 8.3 %Bottineau County8.3Ramsey County: 8.2 %Ramsey County8.2LaMoure County: 8.1 %LaMoure County8.1Bowman County: 8.1 %Bowman County8.1Barnes County: 7.8 %Barnes County7.8Towner County: 7.8 %Towner County7.8Eddy County: 7.6 %Eddy County7.6Pembina County: 7.3 %Pembina County7.3Traill County: 7.1 %Traill County7.1Richland County: 6.8 %Richland County6.8Ward County: 6.8 %Ward County6.8Billings County: 6.7 %Billings County6.7Morton County: 6.7 %Morton County6.7Grant County: 6.7 %Grant County6.7Hettinger County: 6.6 %Hettinger County6.6Cass County: 6.1 %Cass County6.1Burke County: 5.8 %Burke County5.8Dickey County: 5.7 %Dickey County5.7Burleigh County: 5.1 %Burleigh County5.1McIntosh County: 5.1 %McIntosh County5.1Grand Forks County: 5 %Grand Forks County5McHenry County: 4.8 %McHenry County4.8Pierce County: 4.3 %Pierce County4.3Golden Valley County: 4.1 %Golden Valley County4.1McLean County: 4.1 %McLean County4.1Ransom County: 4 %Ransom County4Logan County: 3.7 %Logan County3.7Foster County: 3.1 %Foster County3.1Renville County: 2.8 %Renville County2.8Sargent County: 2.6 %Sargent County2.6Slope County: 1.8 %Slope County1.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Rolette County34.6
2Sioux County34.1
3Mountrail County20.2
4McKenzie County13.9
5Divide County13.8
6Williams County13.3
7Mercer County13
8Sheridan County12.1
9Cavalier County11.5
10Dunn County11.2
11Oliver County10.5
12Benson County10.2
13Wells County10.1
14Nelson County10.1
15Stark County9.8
16Emmons County9.7
17Griggs County9.7
18Stutsman County8.9
19Adams County8.8
20Steele County8.6
21Walsh County8.5
22Kidder County8.4
23Bottineau County8.3
24Ramsey County8.2
25LaMoure County8.1
26Bowman County8.1
27Barnes County7.8
28Towner County7.8
29Eddy County7.6
30Pembina County7.3
31Traill County7.1
32Richland County6.8
33Ward County6.8
34Billings County6.7
35Morton County6.7
36Grant County6.7
37Hettinger County6.6
38Cass County6.1
39Burke County5.8
40Dickey County5.7
41Burleigh County5.1
42McIntosh County5.1
43Grand Forks County5
44McHenry County4.8
45Pierce County4.3
46Golden Valley County4.1
47McLean County4.1
48Ransom County4
49Logan County3.7
50Foster County3.1
51Renville County2.8
52Sargent County2.6
53Slope County1.8

Other periods

About this ranking

People aged 35 to 64 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 35 to 64. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Coverage is what people reported at the interview, so the five-year figure averages five years of answers. People whose only coverage is the Indian Health Service count as uninsured. Active-duty military and people living in institutions are outside the universe. For single-year model-based county figures under 65, see uninsured_rate_under_65, uninsured_rate_18_64 and uninsured_rate_under_19 (SAHIE), a different source.

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. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. 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). American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs (Counties in North Dakota by uninsured rate, ages 35 to 64 (US, ACS), 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in North Dakota by uninsured rate, ages 35 to 64 (US, ACS), 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/north-dakota-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Counties in North Dakota by uninsured rate, ages 35 to 64 (US, ACS), 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/north-dakota-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in North Dakota by uninsured rate, ages 35 to 64 (US, ACS), 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-35-64/north-dakota-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_north_dakota_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in North Dakota by uninsured rate, ages 35 to 64 (US, ACS), 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/north-dakota-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in North Dakota by uninsured rate, ages 35 to 64 (US, ACS), 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate-ages-35-64/north-dakota-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/north-dakota-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b27010.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in North Dakota by uninsured rate, ages 35 to 64 (US, ACS) using official data, and cite the source.
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Questions

Which county has the highest uninsured rate, ages 35 to 64 (US, ACS)?

Rolette County, with 34.6% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 35 to 64 (US, ACS)?

Slope County, with 1.8% 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, American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, ages 35 to 64 (US, ACS): other rankings

Counties in North Dakota: more rankings