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

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

Oglala Lakota County had the highest uninsured rate, ages 35 to 64 (US, ACS) of 66 counties in 2021, at 55.3%. Hand County had the lowest, at 2.8%. The median was 10.5% and the figure for South Dakota was 11.1%. Source: the U.S. Census Bureau.

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Highest55.3Oglala Lakota County
Lowest2.8Hand County
Median10.566 counties
South Dakota11.1History

Map of counties, 2021

Aurora County: 10.7 %Beadle County: 4.7 %Bennett County: 24.9 %Bon Homme County: 9.7 %Brookings County: 5.3 %Brown County: 10.5 %Brule County: 5.3 %Buffalo County: 51.8 %Butte County: 14.6 %Campbell County: 9.1 %Charles Mix County: 21.4 %Clark County: 10.4 %Clay County: 6.1 %Codington County: 8.6 %Corson County: 32.4 %Custer County: 12.6 %Davison County: 8.1 %Day County: 13.9 %Deuel County: 10.6 %Dewey County: 33.3 %Douglas County: 16.8 %Edmunds County: 11 %Fall River County: 20.4 %Faulk County: 3.4 %Grant County: 11.5 %Gregory County: 11.5 %Haakon County: 14.6 %Hamlin County: 7.7 %Hand County: 2.8 %Hanson County: 4.3 %Harding County: 9.2 %Hughes County: 5.7 %Hutchinson County: 7 %Hyde County: 4.2 %Jackson County: 28 %Jerauld County: 8.9 %Jones County: 13.8 %Kingsbury County: 6.5 %Lake County: 4.3 %Lawrence County: 11.8 %Lincoln County: 4 %Lyman County: 22.6 %McCook County: 10.6 %McPherson County: 14.3 %Marshall County: 8.8 %Meade County: 12.5 %Mellette County: 44.7 %Miner County: 13.4 %Minnehaha County: 9.4 %Moody County: 9.5 %Oglala Lakota County: 55.3 %Pennington County: 12.1 %Perkins County: 9.4 %Potter County: 4 %Roberts County: 24.3 %Sanborn County: 10.5 %Spink County: 9.4 %Stanley County: 8.3 %Sully County: 5.8 %Todd County: 40.5 %Tripp County: 13.2 %Turner County: 8.6 %Union County: 7.9 %Walworth County: 10 %Yankton County: 10.6 %Ziebach County: 40.8 %
  • Under 5.8
  • 5.8 to 8.8
  • 8.8 to 10
  • 10 to 13
  • 13 to 22
  • 22 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: 55.3 %Oglala Lakota County55.3Buffalo County: 51.8 %Buffalo County51.8Mellette County: 44.7 %Mellette County44.7Ziebach County: 40.8 %Ziebach County40.8Todd County: 40.5 %Todd County40.5Dewey County: 33.3 %Dewey County33.3Corson County: 32.4 %Corson County32.4Jackson County: 28 %Jackson County28Bennett County: 24.9 %Bennett County24.9Roberts County: 24.3 %Roberts County24.3Lyman County: 22.6 %Lyman County22.6Charles Mix County: 21.4 %Charles Mix County21.4Fall River County: 20.4 %Fall River County20.4Douglas County: 16.8 %Douglas County16.8Haakon County: 14.6 %Haakon County14.6Butte County: 14.6 %Butte County14.6McPherson County: 14.3 %McPherson County14.3Day County: 13.9 %Day County13.9Jones County: 13.8 %Jones County13.8Miner County: 13.4 %Miner County13.4Tripp County: 13.2 %Tripp County13.2Custer County: 12.6 %Custer County12.6Meade County: 12.5 %Meade County12.5Pennington County: 12.1 %Pennington County12.1Lawrence County: 11.8 %Lawrence County11.8Grant County: 11.5 %Grant County11.5Gregory County: 11.5 %Gregory County11.5Edmunds County: 11 %Edmunds County11Aurora County: 10.7 %Aurora County10.7McCook County: 10.6 %McCook County10.6Yankton County: 10.6 %Yankton County10.6Deuel County: 10.6 %Deuel County10.6Brown County: 10.5 %Brown County10.5Sanborn County: 10.5 %Sanborn County10.5Clark County: 10.4 %Clark County10.4Walworth County: 10 %Walworth County10Bon Homme County: 9.7 %Bon Homme County9.7Moody County: 9.5 %Moody County9.5Minnehaha County: 9.4 %Minnehaha County9.4Perkins County: 9.4 %Perkins County9.4Oglala Lakota County: 55.3 %Oglala Lakota County55.3Buffalo County: 51.8 %Buffalo County51.8Mellette County: 44.7 %Mellette County44.7Ziebach County: 40.8 %Ziebach County40.8Todd County: 40.5 %Todd County40.5Dewey County: 33.3 %Dewey County33.3Corson County: 32.4 %Corson County32.4Jackson County: 28 %Jackson County28Bennett County: 24.9 %Bennett County24.9Roberts County: 24.3 %Roberts County24.3Lyman County: 22.6 %Lyman County22.6Charles Mix County: 21.4 %Charles Mix County21.4Fall River County: 20.4 %Fall River County20.4Douglas County: 16.8 %Douglas County16.8Haakon County: 14.6 %Haakon County14.6Butte County: 14.6 %Butte County14.6McPherson County: 14.3 %McPherson County14.3Day County: 13.9 %Day County13.9Jones County: 13.8 %Jones County13.8Miner County: 13.4 %Miner County13.4Tripp County: 13.2 %Tripp County13.2Custer County: 12.6 %Custer County12.6Meade County: 12.5 %Meade County12.5Pennington County: 12.1 %Pennington County12.1Lawrence County: 11.8 %Lawrence County11.8Grant County: 11.5 %Grant County11.5Gregory County: 11.5 %Gregory County11.5Edmunds County: 11 %Edmunds County11Aurora County: 10.7 %Aurora County10.7McCook County: 10.6 %McCook County10.6Yankton County: 10.6 %Yankton County10.6Deuel County: 10.6 %Deuel County10.6Brown County: 10.5 %Brown County10.5Sanborn County: 10.5 %Sanborn County10.5Clark County: 10.4 %Clark County10.4Walworth County: 10 %Walworth County10Bon Homme County: 9.7 %Bon Homme County9.7Moody County: 9.5 %Moody County9.5Minnehaha County: 9.4 %Minnehaha County9.4Perkins County: 9.4 %Perkins County9.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Oglala Lakota County55.3
2Buffalo County51.8
3Mellette County44.7
4Ziebach County40.8
5Todd County40.5
6Dewey County33.3
7Corson County32.4
8Jackson County28
9Bennett County24.9
10Roberts County24.3
11Lyman County22.6
12Charles Mix County21.4
13Fall River County20.4
14Douglas County16.8
15Haakon County14.6
16Butte County14.6
17McPherson County14.3
18Day County13.9
19Jones County13.8
20Miner County13.4
21Tripp County13.2
22Custer County12.6
23Meade County12.5
24Pennington County12.1
25Lawrence County11.8
26Grant County11.5
27Gregory County11.5
28Edmunds County11
29Aurora County10.7
30McCook County10.6
31Yankton County10.6
32Deuel County10.6
33Brown County10.5
34Sanborn County10.5
35Clark County10.4
36Walworth County10
37Bon Homme County9.7
38Moody County9.5
39Minnehaha County9.4
40Perkins County9.4
41Spink County9.4
42Harding County9.2
43Campbell County9.1
44Jerauld County8.9
45Marshall County8.8
46Turner County8.6
47Codington County8.6
48Stanley County8.3
49Davison County8.1
50Union County7.9
51Hamlin County7.7
52Hutchinson County7
53Kingsbury County6.5
54Clay County6.1
55Sully County5.8
56Hughes County5.7
57Brookings County5.3
58Brule County5.3
59Beadle County4.7
60Lake County4.3
61Hanson County4.3
62Hyde County4.2
63Potter County4
64Lincoln County4
65Faulk County3.4
66Hand County2.8

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 South 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 South 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/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 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 South 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/south-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 South 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/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 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 South 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/south-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 South 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/south-dakota-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/south-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 South 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)?

Oglala Lakota County, with 55.3% in 2021, according to the U.S. Census Bureau.

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

Hand County, with 2.8% 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 South Dakota: more rankings