Data / Rankings / Uninsured rate, under 65 (US model-based estimate) / Counties in South Dakota

Counties in South Dakota by uninsured rate, under 65 (US model-based estimate)

Buffalo County had the highest uninsured rate, under 65 (US model-based estimate) of 66 counties in 2020, at 19.8%. Jerauld County had the lowest, at 7.2%. The median was 12.1% and the figure for South Dakota was 11.6%. Source: the U.S. Census Bureau.

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Highest19.8Buffalo County
Lowest7.2Jerauld County
Median12.166 counties
South Dakota11.6History

Map of counties, 2020

Aurora County: 13.6 %Beadle County: 15.1 %Bennett County: 19.3 %Bon Homme County: 12.6 %Brookings County: 8.8 %Brown County: 11.4 %Brule County: 15.9 %Buffalo County: 19.8 %Butte County: 13.7 %Campbell County: 7.9 %Charles Mix County: 18.5 %Clark County: 12.1 %Clay County: 12.3 %Codington County: 11.2 %Corson County: 12.5 %Custer County: 14.1 %Davison County: 11.6 %Day County: 13 %Deuel County: 10 %Dewey County: 18.4 %Douglas County: 12.1 %Edmunds County: 10.4 %Fall River County: 12.4 %Faulk County: 8.4 %Grant County: 13.4 %Gregory County: 15.2 %Haakon County: 10.4 %Hamlin County: 12.3 %Hand County: 9.3 %Hanson County: 9.2 %Harding County: 14.9 %Hughes County: 12.2 %Hutchinson County: 11.2 %Hyde County: 10.9 %Jackson County: 16.7 %Jerauld County: 7.2 %Jones County: 13.4 %Kingsbury County: 10.4 %Lake County: 10.5 %Lawrence County: 13.4 %Lincoln County: 8 %Lyman County: 15.5 %McCook County: 12 %McPherson County: 9.4 %Marshall County: 11.8 %Meade County: 10.9 %Mellette County: 16.6 %Miner County: 11.3 %Minnehaha County: 9.3 %Moody County: 15 %Oglala Lakota County: 18.4 %Pennington County: 13.5 %Perkins County: 8.5 %Potter County: 11.1 %Roberts County: 18.7 %Sanborn County: 10.3 %Spink County: 11 %Stanley County: 9.8 %Sully County: 7.6 %Todd County: 15 %Tripp County: 13.9 %Turner County: 10.7 %Union County: 9 %Walworth County: 13.9 %Yankton County: 12.6 %Ziebach County: 16.5 %
  • Under 9.4
  • 9.4 to 11
  • 11 to 12
  • 12 to 13
  • 13 to 15
  • 15 and over
%, 2020. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2020

Buffalo County: 19.8 %Buffalo County19.8Bennett County: 19.3 %Bennett County19.3Roberts County: 18.7 %Roberts County18.7Charles Mix County: 18.5 %Charles Mix County18.5Dewey County: 18.4 %Dewey County18.4Oglala Lakota County: 18.4 %Oglala Lakota County18.4Jackson County: 16.7 %Jackson County16.7Mellette County: 16.6 %Mellette County16.6Ziebach County: 16.5 %Ziebach County16.5Brule County: 15.9 %Brule County15.9Lyman County: 15.5 %Lyman County15.5Gregory County: 15.2 %Gregory County15.2Beadle County: 15.1 %Beadle County15.1Moody County: 15 %Moody County15Todd County: 15 %Todd County15Harding County: 14.9 %Harding County14.9Custer County: 14.1 %Custer County14.1Tripp County: 13.9 %Tripp County13.9Walworth County: 13.9 %Walworth County13.9Butte County: 13.7 %Butte County13.7Aurora County: 13.6 %Aurora County13.6Pennington County: 13.5 %Pennington County13.5Grant County: 13.4 %Grant County13.4Jones County: 13.4 %Jones County13.4Lawrence County: 13.4 %Lawrence County13.4Day County: 13 %Day County13Bon Homme County: 12.6 %Bon Homme County12.6Yankton County: 12.6 %Yankton County12.6Corson County: 12.5 %Corson County12.5Fall River County: 12.4 %Fall River County12.4Clay County: 12.3 %Clay County12.3Hamlin County: 12.3 %Hamlin County12.3Hughes County: 12.2 %Hughes County12.2Clark County: 12.1 %Clark County12.1Douglas County: 12.1 %Douglas County12.1McCook County: 12 %McCook County12Marshall County: 11.8 %Marshall County11.8Davison County: 11.6 %Davison County11.6Brown County: 11.4 %Brown County11.4Miner County: 11.3 %Miner County11.3Buffalo County: 19.8 %Buffalo County19.8Bennett County: 19.3 %Bennett County19.3Roberts County: 18.7 %Roberts County18.7Charles Mix County: 18.5 %Charles Mix County18.5Dewey County: 18.4 %Dewey County18.4Oglala Lakota County: 18.4 %Oglala Lakota County18.4Jackson County: 16.7 %Jackson County16.7Mellette County: 16.6 %Mellette County16.6Ziebach County: 16.5 %Ziebach County16.5Brule County: 15.9 %Brule County15.9Lyman County: 15.5 %Lyman County15.5Gregory County: 15.2 %Gregory County15.2Beadle County: 15.1 %Beadle County15.1Moody County: 15 %Moody County15Todd County: 15 %Todd County15Harding County: 14.9 %Harding County14.9Custer County: 14.1 %Custer County14.1Tripp County: 13.9 %Tripp County13.9Walworth County: 13.9 %Walworth County13.9Butte County: 13.7 %Butte County13.7Aurora County: 13.6 %Aurora County13.6Pennington County: 13.5 %Pennington County13.5Grant County: 13.4 %Grant County13.4Jones County: 13.4 %Jones County13.4Lawrence County: 13.4 %Lawrence County13.4Day County: 13 %Day County13Bon Homme County: 12.6 %Bon Homme County12.6Yankton County: 12.6 %Yankton County12.6Corson County: 12.5 %Corson County12.5Fall River County: 12.4 %Fall River County12.4Clay County: 12.3 %Clay County12.3Hamlin County: 12.3 %Hamlin County12.3Hughes County: 12.2 %Hughes County12.2Clark County: 12.1 %Clark County12.1Douglas County: 12.1 %Douglas County12.1McCook County: 12 %McCook County12Marshall County: 11.8 %Marshall County11.8Davison County: 11.6 %Davison County11.6Brown County: 11.4 %Brown County11.4Miner County: 11.3 %Miner County11.3
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2020 (%)Change on 2019
1Buffalo County19.8+1.4 pts
2Bennett County19.3-2.5 pts
3Roberts County18.7-0.3 pts
4Charles Mix County18.5-0.8 pts
5Dewey County18.4-2.3 pts
5Oglala Lakota County18.4+1.3 pts
7Jackson County16.7-7.7 pts
8Mellette County16.6-5.5 pts
9Ziebach County16.5-3.5 pts
10Brule County15.9-1.6 pts
11Lyman County15.5-1.4 pts
12Gregory County15.2-1.4 pts
13Beadle County15.1-1.3 pts
14Moody County15+0.7 pts
14Todd County15-4 pts
16Harding County14.9-4.2 pts
17Custer County14.1+1.4 pts
18Tripp County13.9-3.8 pts
18Walworth County13.9-0.5 pts
20Butte County13.7-2.2 pts
21Aurora County13.6-4.1 pts
22Pennington County13.5+0.6 pts
23Grant County13.4+2 pts
23Jones County13.4-2.4 pts
23Lawrence County13.4+1.5 pts
26Day County13-2.5 pts
27Bon Homme County12.6-0.3 pts
27Yankton County12.6+1.5 pts
29Corson County12.5-7.7 pts
30Fall River County12.4-0.7 pts
31Clay County12.3+1.3 pts
31Hamlin County12.3-0.2 pts
33Hughes County12.2+1.5 pts
34Clark County12.1-0.9 pts
34Douglas County12.1-2.9 pts
36McCook County12-0.3 pts
37Marshall County11.8-4.4 pts
38Davison County11.6+1.4 pts
39Brown County11.4-0.8 pts
40Miner County11.3-0.6 pts
41Codington County11.2+1 pts
41Hutchinson County11.2-2 pts
43Potter County11.1-0.4 pts
44Spink County11-0.8 pts
45Hyde County10.9-5.9 pts
45Meade County10.9+0.8 pts
47Turner County10.70 pts
48Lake County10.5+1.9 pts
49Edmunds County10.4-1 pts
49Haakon County10.4-3.9 pts
49Kingsbury County10.4-0.3 pts
52Sanborn County10.3-1.5 pts
53Deuel County10-2.3 pts
54Stanley County9.8-1.3 pts
55McPherson County9.4-3.8 pts
56Hand County9.3-1.7 pts
56Minnehaha County9.3-1.7 pts
58Hanson County9.2-0.9 pts
59Union County9+0.8 pts
60Brookings County8.8-0.9 pts
61Perkins County8.5-8 pts
62Faulk County8.4-5.9 pts
63Lincoln County8+1.1 pts
64Campbell County7.9-3.6 pts
65Sully County7.6-2.4 pts
66Jerauld County7.2-5.2 pts

Other periods

About this ranking

People under 65 without health insurance coverage of any kind, as a percentage of all people under 65. United States: Census Bureau Small Area Health Insurance Estimates (SAHIE) for states and counties, all races, both sexes and all income levels.

A model-based single-year estimate that combines the American Community Survey with administrative records and population estimates, so every county gets a figure. Covers states and counties only, because the SAHIE dataset files have no national row. The Census Bureau advises comparing years from 2008 on only; 2013 is the updated release. People 65 and over are left out because nearly all of them have Medicare.

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. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. 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). Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties (Counties in South Dakota by uninsured rate, under 65 (US model-based estimate), 2020) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in South Dakota by uninsured rate, under 65 (US model-based estimate), 2020. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/south-dakota-counties?period=2020. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Counties in South Dakota by uninsured rate, under 65 (US model-based estimate), 2020. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/south-dakota-counties?period=2020.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties, Counties in South Dakota by uninsured rate, under 65 (US model-based estimate), 2020 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-under-65/south-dakota-counties?period=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2020,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties: Counties in South Dakota by uninsured rate, under 65 (US model-based estimate), 2020}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/south-dakota-counties?period=2020. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties: Counties in South Dakota by uninsured rate, under 65 (US model-based estimate), 2020
PY  - 2026
DA  - 2026/08/06
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-under-65/south-dakota-counties?period=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-under-65/south-dakota-counties?period=2020.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2020-csv.zip. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest uninsured rate, under 65 (US model-based estimate)?

Buffalo County, with 19.8% in 2020, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, under 65 (US model-based estimate)?

Jerauld County, with 7.2% in 2020.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, under 65, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, under 65 (US model-based estimate): other rankings

Counties in South Dakota: more rankings