Data / Rankings / Uninsured rate, all ages (US) / Counties in South Dakota

Counties in South Dakota by uninsured rate, all ages (US)

Oglala Lakota County had the highest uninsured rate, all ages (US) of 66 counties in 2021, at 41.9%. Hand County had the lowest, at 3%. The median was 7.8% and the figure for South Dakota was 9.6%. Source: the U.S. Census Bureau.

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Highest41.9Oglala Lakota County
Lowest3Hand County
Median7.866 counties
South Dakota9.6History

Map of counties, 2021

Aurora County: 8.8 %Beadle County: 4.9 %Bennett County: 22.9 %Bon Homme County: 7.3 %Brookings County: 5.2 %Brown County: 7.5 %Brule County: 8.7 %Buffalo County: 41.6 %Butte County: 13.7 %Campbell County: 3.8 %Charles Mix County: 17.9 %Clark County: 7 %Clay County: 6.4 %Codington County: 6.8 %Corson County: 23.8 %Custer County: 10.5 %Davison County: 7.6 %Day County: 9.2 %Deuel County: 7.7 %Dewey County: 24.2 %Douglas County: 15.4 %Edmunds County: 5.3 %Fall River County: 11.6 %Faulk County: 3.9 %Grant County: 10.1 %Gregory County: 7.7 %Haakon County: 13 %Hamlin County: 10 %Hand County: 3 %Hanson County: 5 %Harding County: 7.2 %Hughes County: 7.1 %Hutchinson County: 4.4 %Hyde County: 4.2 %Jackson County: 26.9 %Jerauld County: 5.2 %Jones County: 8.8 %Kingsbury County: 5.4 %Lake County: 4.2 %Lawrence County: 10.6 %Lincoln County: 4.1 %Lyman County: 19.9 %McCook County: 7.9 %McPherson County: 7.5 %Marshall County: 6.8 %Meade County: 11.5 %Mellette County: 38.1 %Miner County: 7.1 %Minnehaha County: 8.2 %Moody County: 7.4 %Oglala Lakota County: 41.9 %Pennington County: 11.3 %Perkins County: 9.1 %Potter County: 7.8 %Roberts County: 21.1 %Sanborn County: 8.9 %Spink County: 7.9 %Stanley County: 6.4 %Sully County: 5.2 %Todd County: 27.5 %Tripp County: 9.9 %Turner County: 6.8 %Union County: 6 %Walworth County: 10.7 %Yankton County: 7.7 %Ziebach County: 30.9 %
  • Under 5.2
  • 5.2 to 7.1
  • 7.1 to 7.8
  • 7.8 to 10
  • 10 to 18
  • 18 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Oglala Lakota County: 41.9 %Oglala Lakota County41.9Buffalo County: 41.6 %Buffalo County41.6Mellette County: 38.1 %Mellette County38.1Ziebach County: 30.9 %Ziebach County30.9Todd County: 27.5 %Todd County27.5Jackson County: 26.9 %Jackson County26.9Dewey County: 24.2 %Dewey County24.2Corson County: 23.8 %Corson County23.8Bennett County: 22.9 %Bennett County22.9Roberts County: 21.1 %Roberts County21.1Lyman County: 19.9 %Lyman County19.9Charles Mix County: 17.9 %Charles Mix County17.9Douglas County: 15.4 %Douglas County15.4Butte County: 13.7 %Butte County13.7Haakon County: 13 %Haakon County13Fall River County: 11.6 %Fall River County11.6Meade County: 11.5 %Meade County11.5Pennington County: 11.3 %Pennington County11.3Walworth County: 10.7 %Walworth County10.7Lawrence County: 10.6 %Lawrence County10.6Custer County: 10.5 %Custer County10.5Grant County: 10.1 %Grant County10.1Hamlin County: 10 %Hamlin County10Tripp County: 9.9 %Tripp County9.9Day County: 9.2 %Day County9.2Perkins County: 9.1 %Perkins County9.1Sanborn County: 8.9 %Sanborn County8.9Jones County: 8.8 %Jones County8.8Aurora County: 8.8 %Aurora County8.8Brule County: 8.7 %Brule County8.7Minnehaha County: 8.2 %Minnehaha County8.2Spink County: 7.9 %Spink County7.9McCook County: 7.9 %McCook County7.9Potter County: 7.8 %Potter County7.8Yankton County: 7.7 %Yankton County7.7Gregory County: 7.7 %Gregory County7.7Deuel County: 7.7 %Deuel County7.7Davison County: 7.6 %Davison County7.6Brown County: 7.5 %Brown County7.5McPherson County: 7.5 %McPherson County7.5Oglala Lakota County: 41.9 %Oglala Lakota County41.9Buffalo County: 41.6 %Buffalo County41.6Mellette County: 38.1 %Mellette County38.1Ziebach County: 30.9 %Ziebach County30.9Todd County: 27.5 %Todd County27.5Jackson County: 26.9 %Jackson County26.9Dewey County: 24.2 %Dewey County24.2Corson County: 23.8 %Corson County23.8Bennett County: 22.9 %Bennett County22.9Roberts County: 21.1 %Roberts County21.1Lyman County: 19.9 %Lyman County19.9Charles Mix County: 17.9 %Charles Mix County17.9Douglas County: 15.4 %Douglas County15.4Butte County: 13.7 %Butte County13.7Haakon County: 13 %Haakon County13Fall River County: 11.6 %Fall River County11.6Meade County: 11.5 %Meade County11.5Pennington County: 11.3 %Pennington County11.3Walworth County: 10.7 %Walworth County10.7Lawrence County: 10.6 %Lawrence County10.6Custer County: 10.5 %Custer County10.5Grant County: 10.1 %Grant County10.1Hamlin County: 10 %Hamlin County10Tripp County: 9.9 %Tripp County9.9Day County: 9.2 %Day County9.2Perkins County: 9.1 %Perkins County9.1Sanborn County: 8.9 %Sanborn County8.9Jones County: 8.8 %Jones County8.8Aurora County: 8.8 %Aurora County8.8Brule County: 8.7 %Brule County8.7Minnehaha County: 8.2 %Minnehaha County8.2Spink County: 7.9 %Spink County7.9McCook County: 7.9 %McCook County7.9Potter County: 7.8 %Potter County7.8Yankton County: 7.7 %Yankton County7.7Gregory County: 7.7 %Gregory County7.7Deuel County: 7.7 %Deuel County7.7Davison County: 7.6 %Davison County7.6Brown County: 7.5 %Brown County7.5McPherson County: 7.5 %McPherson County7.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Oglala Lakota County41.9
2Buffalo County41.6
3Mellette County38.1
4Ziebach County30.9
5Todd County27.5
6Jackson County26.9
7Dewey County24.2
8Corson County23.8
9Bennett County22.9
10Roberts County21.1
11Lyman County19.9
12Charles Mix County17.9
13Douglas County15.4
14Butte County13.7
15Haakon County13
16Fall River County11.6
17Meade County11.5
18Pennington County11.3
19Walworth County10.7
20Lawrence County10.6
21Custer County10.5
22Grant County10.1
23Hamlin County10
24Tripp County9.9
25Day County9.2
26Perkins County9.1
27Sanborn County8.9
28Jones County8.8
29Aurora County8.8
30Brule County8.7
31Minnehaha County8.2
32Spink County7.9
33McCook County7.9
34Potter County7.8
35Yankton County7.7
36Gregory County7.7
37Deuel County7.7
38Davison County7.6
39Brown County7.5
40McPherson County7.5
41Moody County7.4
42Bon Homme County7.3
43Harding County7.2
44Miner County7.1
45Hughes County7.1
46Clark County7
47Marshall County6.8
48Codington County6.8
49Turner County6.8
50Clay County6.4
50Stanley County6.4
52Union County6
53Kingsbury County5.4
54Edmunds County5.3
55Brookings County5.2
55Jerauld County5.2
55Sully County5.2
58Hanson County5
59Beadle County4.9
60Hutchinson County4.4
61Lake County4.2
62Hyde County4.2
63Lincoln County4.1
64Faulk County3.9
65Campbell County3.8
66Hand County3

Other periods

About this ranking

People without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population. 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs (Counties in South Dakota by uninsured rate, all ages (US), 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in South Dakota by uninsured rate, all ages (US), 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/south-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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Counties in South Dakota by uninsured rate, all ages (US), 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/south-dakota-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs, Counties in South Dakota by uninsured rate, all ages (US), 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/south-dakota-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in South Dakota by uninsured rate, all ages (US), 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/south-dakota-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs: Counties in South Dakota by uninsured rate, all ages (US), 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/south-dakota-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate/south-dakota-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people with no health insurance coverage as a percentage of the civilian noninstitutionalized population, 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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Questions

Which county has the highest uninsured rate, all ages (US)?

Oglala Lakota County, with 41.9% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, all ages (US)?

Hand County, with 3% 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 with no health insurance coverage as a percentage of the civilian noninstitutionalized population, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, all ages (US): other rankings

Counties in South Dakota: more rankings