Data / Rankings / Uninsured rate, ages 18 to 64 (US model-based estimate) / Counties in South Dakota

Counties in South Dakota by uninsured rate, ages 18 to 64 (US model-based estimate)

Mellette County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 66 counties in 2023, at 20.1%. Potter County had the lowest, at 6.9%. The median was 12% and the figure for South Dakota was 11.2%. Source: the U.S. Census Bureau.

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Highest20.1Mellette County
Lowest6.9Potter County
Median1266 counties
South Dakota11.2History

Map of counties, 2023

Aurora County: 13.8 %Beadle County: 15.7 %Bennett County: 16.9 %Bon Homme County: 10.3 %Brookings County: 9.8 %Brown County: 11 %Brule County: 15.7 %Buffalo County: 14.9 %Butte County: 16.5 %Campbell County: 10.5 %Charles Mix County: 15.8 %Clark County: 13 %Clay County: 13.7 %Codington County: 11.1 %Corson County: 16.3 %Custer County: 11.9 %Davison County: 12 %Day County: 13.7 %Deuel County: 10.3 %Dewey County: 17.9 %Douglas County: 12.4 %Edmunds County: 11.7 %Fall River County: 13.7 %Faulk County: 11.2 %Grant County: 12.8 %Gregory County: 16.5 %Haakon County: 12 %Hamlin County: 11.8 %Hand County: 10.4 %Hanson County: 10 %Harding County: 12.3 %Hughes County: 7.6 %Hutchinson County: 9.8 %Hyde County: 10.3 %Jackson County: 19.2 %Jerauld County: 10 %Jones County: 8.7 %Kingsbury County: 11.7 %Lake County: 9.9 %Lawrence County: 11.8 %Lincoln County: 7.4 %Lyman County: 15.8 %McCook County: 10.4 %McPherson County: 12.1 %Marshall County: 13 %Meade County: 10.7 %Mellette County: 20.1 %Miner County: 10.5 %Minnehaha County: 10.4 %Moody County: 11.8 %Oglala Lakota County: 15.2 %Pennington County: 12.2 %Perkins County: 13.9 %Potter County: 6.9 %Roberts County: 15.1 %Sanborn County: 12.9 %Spink County: 11.1 %Stanley County: 9.1 %Sully County: 10 %Todd County: 17.1 %Tripp County: 17.5 %Turner County: 11.8 %Union County: 7.8 %Walworth County: 13.1 %Yankton County: 10.3 %Ziebach County: 13.7 %
  • Under 10
  • 10 to 11
  • 11 to 12
  • 12 to 13
  • 13 to 16
  • 16 and over
%, 2023. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2023

Mellette County: 20.1 %Mellette County20.1Jackson County: 19.2 %Jackson County19.2Dewey County: 17.9 %Dewey County17.9Tripp County: 17.5 %Tripp County17.5Todd County: 17.1 %Todd County17.1Bennett County: 16.9 %Bennett County16.9Butte County: 16.5 %Butte County16.5Gregory County: 16.5 %Gregory County16.5Corson County: 16.3 %Corson County16.3Charles Mix County: 15.8 %Charles Mix County15.8Lyman County: 15.8 %Lyman County15.8Beadle County: 15.7 %Beadle County15.7Brule County: 15.7 %Brule County15.7Oglala Lakota County: 15.2 %Oglala Lakota County15.2Roberts County: 15.1 %Roberts County15.1Buffalo County: 14.9 %Buffalo County14.9Perkins County: 13.9 %Perkins County13.9Aurora County: 13.8 %Aurora County13.8Clay County: 13.7 %Clay County13.7Day County: 13.7 %Day County13.7Fall River County: 13.7 %Fall River County13.7Ziebach County: 13.7 %Ziebach County13.7Walworth County: 13.1 %Walworth County13.1Clark County: 13 %Clark County13Marshall County: 13 %Marshall County13Sanborn County: 12.9 %Sanborn County12.9Grant County: 12.8 %Grant County12.8Douglas County: 12.4 %Douglas County12.4Harding County: 12.3 %Harding County12.3Pennington County: 12.2 %Pennington County12.2McPherson County: 12.1 %McPherson County12.1Davison County: 12 %Davison County12Haakon County: 12 %Haakon County12Custer County: 11.9 %Custer County11.9Hamlin County: 11.8 %Hamlin County11.8Lawrence County: 11.8 %Lawrence County11.8Moody County: 11.8 %Moody County11.8Turner County: 11.8 %Turner County11.8Edmunds County: 11.7 %Edmunds County11.7Kingsbury County: 11.7 %Kingsbury County11.7Mellette County: 20.1 %Mellette County20.1Jackson County: 19.2 %Jackson County19.2Dewey County: 17.9 %Dewey County17.9Tripp County: 17.5 %Tripp County17.5Todd County: 17.1 %Todd County17.1Bennett County: 16.9 %Bennett County16.9Butte County: 16.5 %Butte County16.5Gregory County: 16.5 %Gregory County16.5Corson County: 16.3 %Corson County16.3Charles Mix County: 15.8 %Charles Mix County15.8Lyman County: 15.8 %Lyman County15.8Beadle County: 15.7 %Beadle County15.7Brule County: 15.7 %Brule County15.7Oglala Lakota County: 15.2 %Oglala Lakota County15.2Roberts County: 15.1 %Roberts County15.1Buffalo County: 14.9 %Buffalo County14.9Perkins County: 13.9 %Perkins County13.9Aurora County: 13.8 %Aurora County13.8Clay County: 13.7 %Clay County13.7Day County: 13.7 %Day County13.7Fall River County: 13.7 %Fall River County13.7Ziebach County: 13.7 %Ziebach County13.7Walworth County: 13.1 %Walworth County13.1Clark County: 13 %Clark County13Marshall County: 13 %Marshall County13Sanborn County: 12.9 %Sanborn County12.9Grant County: 12.8 %Grant County12.8Douglas County: 12.4 %Douglas County12.4Harding County: 12.3 %Harding County12.3Pennington County: 12.2 %Pennington County12.2McPherson County: 12.1 %McPherson County12.1Davison County: 12 %Davison County12Haakon County: 12 %Haakon County12Custer County: 11.9 %Custer County11.9Hamlin County: 11.8 %Hamlin County11.8Lawrence County: 11.8 %Lawrence County11.8Moody County: 11.8 %Moody County11.8Turner County: 11.8 %Turner County11.8Edmunds County: 11.7 %Edmunds County11.7Kingsbury County: 11.7 %Kingsbury County11.7
%. Source: U.S. Census Bureau, Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Mellette County20.1+0.9 pts
2Jackson County19.2-1.9 pts
3Dewey County17.9-6 pts
4Tripp County17.5-1.4 pts
5Todd County17.1-2.7 pts
6Bennett County16.9-1.9 pts
7Butte County16.50 pts
7Gregory County16.5-1.3 pts
9Corson County16.3+1.6 pts
10Charles Mix County15.8-2 pts
10Lyman County15.8-1.4 pts
12Beadle County15.7+0.3 pts
12Brule County15.7+0.4 pts
14Oglala Lakota County15.2-3.7 pts
15Roberts County15.1-2.4 pts
16Buffalo County14.9-3.2 pts
17Perkins County13.9+1.2 pts
18Aurora County13.8+1.3 pts
19Clay County13.7+2.4 pts
19Day County13.7-0.6 pts
19Fall River County13.7-0.3 pts
19Ziebach County13.7-1.6 pts
23Walworth County13.1-1 pts
24Clark County13+2.2 pts
24Marshall County13+1 pts
26Sanborn County12.9+0.9 pts
27Grant County12.8+1.4 pts
28Douglas County12.4-0.8 pts
29Harding County12.3-0.3 pts
30Pennington County12.2-0.3 pts
31McPherson County12.1+3.4 pts
32Davison County12-0.2 pts
32Haakon County12+0.5 pts
34Custer County11.9-2 pts
35Hamlin County11.8-0.9 pts
35Lawrence County11.8-0.3 pts
35Moody County11.8-1.3 pts
35Turner County11.8+1.7 pts
39Edmunds County11.7+1.6 pts
39Kingsbury County11.7+1 pts
41Faulk County11.2+0.1 pts
42Codington County11.1-0.6 pts
42Spink County11.1-0.6 pts
44Brown County11-0.1 pts
45Meade County10.7+1.1 pts
46Campbell County10.5-0.1 pts
46Miner County10.5-0.7 pts
48Hand County10.4-0.5 pts
48McCook County10.4-1.7 pts
48Minnehaha County10.4-0.7 pts
51Bon Homme County10.3+0.3 pts
51Deuel County10.3-0.3 pts
51Hyde County10.3+0.2 pts
51Yankton County10.3-0.7 pts
55Hanson County10+0.7 pts
55Jerauld County10-0.2 pts
55Sully County10+2.8 pts
58Lake County9.9-0.1 pts
59Brookings County9.8+1.3 pts
59Hutchinson County9.8-0.2 pts
61Stanley County9.1-2.3 pts
62Jones County8.7-1.4 pts
63Union County7.80 pts
64Hughes County7.6-1 pts
65Lincoln County7.4-0.1 pts
66Potter County6.9-1.8 pts

Other periods

About this ranking

People aged 18 to 64 without health insurance coverage of any kind, as a percentage of all people aged 18 to 64. 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. Working-age adults; the rate for everyone under 65 is uninsured_rate_under_65.

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, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-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, ages 18 to 64, all races, both sexes, all income levels, states and counties (Counties in South Dakota by uninsured rate, ages 18 to 64 (US model-based estimate), 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip

MLA 9

Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in South Dakota by uninsured rate, ages 18 to 64 (US model-based estimate), 2023. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2023. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. Counties in South Dakota by uninsured rate, ages 18 to 64 (US model-based estimate), 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2023.

Harvard

U.S. Census Bureau (2026) Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties, Counties in South Dakota by uninsured rate, ages 18 to 64 (US model-based estimate), 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2023,
  author = {{U.S. Census Bureau}},
  title = {{Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in South Dakota by uninsured rate, ages 18 to 64 (US model-based estimate), 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2023. Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties: Counties in South Dakota by uninsured rate, ages 18 to 64 (US model-based estimate), 2023
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-2023-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2023.
N1  - Publisher attribution: U.S. Census Bureau. Small Area Health Insurance Estimates (SAHIE): percent uninsured, ages 18 to 64, all races, both sexes, all income levels, states and counties. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2023-csv.zip. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest uninsured rate, ages 18 to 64 (US model-based estimate)?

Mellette County, with 20.1% in 2023, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 18 to 64 (US model-based estimate)?

Potter County, with 6.9% in 2023.

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, ages 18 to 64, all races, both sexes, all income levels, states and counties. Retrieved 2026-10-12.

Uninsured rate, ages 18 to 64 (US model-based estimate): other rankings

Counties in South Dakota: more rankings