Data / Rankings / Uninsured rate, ages 19 to 34 (US, ACS) / Counties in South Dakota

Counties in South Dakota by uninsured rate, ages 19 to 34 (US, ACS)

Mellette County had the highest uninsured rate, ages 19 to 34 (US, ACS) of 66 counties in 2021, at 79.3%. Campbell County had the lowest, at 1.9%. The median was 17.5% and the figure for South Dakota was 18.1%. Source: the U.S. Census Bureau.

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Highest79.3Mellette County
Lowest1.9Campbell County
Median17.566 counties
South Dakota18.1History

Map of counties, 2021

Aurora County: 19.6 %Beadle County: 8.5 %Bennett County: 44.4 %Bon Homme County: 10.8 %Brookings County: 8.4 %Brown County: 11.6 %Brule County: 27.2 %Buffalo County: 66.2 %Butte County: 35.5 %Campbell County: 1.9 %Charles Mix County: 34.2 %Clark County: 16.4 %Clay County: 11.5 %Codington County: 11.6 %Corson County: 47.9 %Custer County: 20.4 %Davison County: 15.9 %Day County: 13.1 %Deuel County: 15.8 %Dewey County: 46.5 %Douglas County: 22.6 %Edmunds County: 5.6 %Fall River County: 13 %Faulk County: 18.6 %Grant County: 22.2 %Gregory County: 23.5 %Haakon County: 39 %Hamlin County: 21.1 %Hand County: 5.7 %Hanson County: 13.5 %Harding County: 14.8 %Hughes County: 20.4 %Hutchinson County: 8.5 %Hyde County: 9.3 %Jackson County: 58.2 %Jerauld County: 13.9 %Jones County: 16.4 %Kingsbury County: 14.2 %Lake County: 11.7 %Lawrence County: 22.6 %Lincoln County: 9.4 %Lyman County: 28.8 %McCook County: 16 %McPherson County: 8.2 %Marshall County: 13.8 %Meade County: 20.2 %Mellette County: 79.3 %Miner County: 5.1 %Minnehaha County: 13.7 %Moody County: 11 %Oglala Lakota County: 64.3 %Pennington County: 25.6 %Perkins County: 27.4 %Potter County: 23.4 %Roberts County: 38.5 %Sanborn County: 19.6 %Spink County: 20.2 %Stanley County: 20.7 %Sully County: 13.4 %Todd County: 57.4 %Tripp County: 24.7 %Turner County: 15.4 %Union County: 10 %Walworth County: 32.3 %Yankton County: 10.9 %Ziebach County: 50.4 %
  • Under 11
  • 11 to 14
  • 14 to 17
  • 17 to 23
  • 23 to 36
  • 36 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

Mellette County: 79.3 %Mellette County79.3Buffalo County: 66.2 %Buffalo County66.2Oglala Lakota County: 64.3 %Oglala Lakota County64.3Jackson County: 58.2 %Jackson County58.2Todd County: 57.4 %Todd County57.4Ziebach County: 50.4 %Ziebach County50.4Corson County: 47.9 %Corson County47.9Dewey County: 46.5 %Dewey County46.5Bennett County: 44.4 %Bennett County44.4Haakon County: 39 %Haakon County39Roberts County: 38.5 %Roberts County38.5Butte County: 35.5 %Butte County35.5Charles Mix County: 34.2 %Charles Mix County34.2Walworth County: 32.3 %Walworth County32.3Lyman County: 28.8 %Lyman County28.8Perkins County: 27.4 %Perkins County27.4Brule County: 27.2 %Brule County27.2Pennington County: 25.6 %Pennington County25.6Tripp County: 24.7 %Tripp County24.7Gregory County: 23.5 %Gregory County23.5Potter County: 23.4 %Potter County23.4Douglas County: 22.6 %Douglas County22.6Lawrence County: 22.6 %Lawrence County22.6Grant County: 22.2 %Grant County22.2Hamlin County: 21.1 %Hamlin County21.1Stanley County: 20.7 %Stanley County20.7Hughes County: 20.4 %Hughes County20.4Custer County: 20.4 %Custer County20.4Meade County: 20.2 %Meade County20.2Spink County: 20.2 %Spink County20.2Sanborn County: 19.6 %Sanborn County19.6Aurora County: 19.6 %Aurora County19.6Faulk County: 18.6 %Faulk County18.6Jones County: 16.4 %Jones County16.4Clark County: 16.4 %Clark County16.4McCook County: 16 %McCook County16Davison County: 15.9 %Davison County15.9Deuel County: 15.8 %Deuel County15.8Turner County: 15.4 %Turner County15.4Harding County: 14.8 %Harding County14.8Mellette County: 79.3 %Mellette County79.3Buffalo County: 66.2 %Buffalo County66.2Oglala Lakota County: 64.3 %Oglala Lakota County64.3Jackson County: 58.2 %Jackson County58.2Todd County: 57.4 %Todd County57.4Ziebach County: 50.4 %Ziebach County50.4Corson County: 47.9 %Corson County47.9Dewey County: 46.5 %Dewey County46.5Bennett County: 44.4 %Bennett County44.4Haakon County: 39 %Haakon County39Roberts County: 38.5 %Roberts County38.5Butte County: 35.5 %Butte County35.5Charles Mix County: 34.2 %Charles Mix County34.2Walworth County: 32.3 %Walworth County32.3Lyman County: 28.8 %Lyman County28.8Perkins County: 27.4 %Perkins County27.4Brule County: 27.2 %Brule County27.2Pennington County: 25.6 %Pennington County25.6Tripp County: 24.7 %Tripp County24.7Gregory County: 23.5 %Gregory County23.5Potter County: 23.4 %Potter County23.4Douglas County: 22.6 %Douglas County22.6Lawrence County: 22.6 %Lawrence County22.6Grant County: 22.2 %Grant County22.2Hamlin County: 21.1 %Hamlin County21.1Stanley County: 20.7 %Stanley County20.7Hughes County: 20.4 %Hughes County20.4Custer County: 20.4 %Custer County20.4Meade County: 20.2 %Meade County20.2Spink County: 20.2 %Spink County20.2Sanborn County: 19.6 %Sanborn County19.6Aurora County: 19.6 %Aurora County19.6Faulk County: 18.6 %Faulk County18.6Jones County: 16.4 %Jones County16.4Clark County: 16.4 %Clark County16.4McCook County: 16 %McCook County16Davison County: 15.9 %Davison County15.9Deuel County: 15.8 %Deuel County15.8Turner County: 15.4 %Turner County15.4Harding County: 14.8 %Harding County14.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Mellette County79.3
2Buffalo County66.2
3Oglala Lakota County64.3
4Jackson County58.2
5Todd County57.4
6Ziebach County50.4
7Corson County47.9
8Dewey County46.5
9Bennett County44.4
10Haakon County39
11Roberts County38.5
12Butte County35.5
13Charles Mix County34.2
14Walworth County32.3
15Lyman County28.8
16Perkins County27.4
17Brule County27.2
18Pennington County25.6
19Tripp County24.7
20Gregory County23.5
21Potter County23.4
22Douglas County22.6
22Lawrence County22.6
24Grant County22.2
25Hamlin County21.1
26Stanley County20.7
27Hughes County20.4
28Custer County20.4
29Meade County20.2
30Spink County20.2
31Sanborn County19.6
32Aurora County19.6
33Faulk County18.6
34Jones County16.4
35Clark County16.4
36McCook County16
37Davison County15.9
38Deuel County15.8
39Turner County15.4
40Harding County14.8
41Kingsbury County14.2
42Jerauld County13.9
43Marshall County13.8
44Minnehaha County13.7
45Hanson County13.5
46Sully County13.4
47Day County13.1
48Fall River County13
49Lake County11.7
50Brown County11.6
51Codington County11.6
52Clay County11.5
53Moody County11
54Yankton County10.9
55Bon Homme County10.8
56Union County10
57Lincoln County9.4
58Hyde County9.3
59Hutchinson County8.5
60Beadle County8.5
61Brookings County8.4
62McPherson County8.2
63Hand County5.7
64Edmunds County5.6
65Miner County5.1
66Campbell County1.9

Other periods

About this ranking

People aged 19 to 34 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 19 to 34. 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 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, 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 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs (Counties in South Dakota by uninsured rate, ages 19 to 34 (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 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs, Counties in South Dakota by uninsured rate, ages 19 to 34 (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-19-34/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 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs. Counties in South Dakota by uninsured rate, ages 19 to 34 (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-19-34/south-dakota-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs, Counties in South Dakota by uninsured rate, ages 19 to 34 (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-19-34/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 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs: Counties in South Dakota by uninsured rate, ages 19 to 34 (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-19-34/south-dakota-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, 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 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs: Counties in South Dakota by uninsured rate, ages 19 to 34 (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-19-34/south-dakota-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-19-34/south-dakota-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, 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, ages 19 to 34 (US, ACS)?

Mellette County, with 79.3% in 2021, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 19 to 34 (US, ACS)?

Campbell County, with 1.9% 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 19 to 34 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 19 to 34, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, ages 19 to 34 (US, ACS): other rankings

Counties in South Dakota: more rankings