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)

Dewey County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 66 counties in 2022, at 23.9%. Sully County had the lowest, at 7.2%. The median was 11.9% and the figure for South Dakota was 11.5%. Source: the U.S. Census Bureau.

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Highest23.9Dewey County
Lowest7.2Sully County
Median11.966 counties
South Dakota11.5History

Map of counties, 2022

Aurora County: 12.5 %Beadle County: 15.4 %Bennett County: 18.8 %Bon Homme County: 10 %Brookings County: 8.5 %Brown County: 11.1 %Brule County: 15.3 %Buffalo County: 18.1 %Butte County: 16.5 %Campbell County: 10.6 %Charles Mix County: 17.8 %Clark County: 10.8 %Clay County: 11.3 %Codington County: 11.7 %Corson County: 14.7 %Custer County: 13.9 %Davison County: 12.2 %Day County: 14.3 %Deuel County: 10.6 %Dewey County: 23.9 %Douglas County: 13.2 %Edmunds County: 10.1 %Fall River County: 14 %Faulk County: 11.1 %Grant County: 11.4 %Gregory County: 17.8 %Haakon County: 11.5 %Hamlin County: 12.7 %Hand County: 10.9 %Hanson County: 9.3 %Harding County: 12.6 %Hughes County: 8.6 %Hutchinson County: 10 %Hyde County: 10.1 %Jackson County: 21.1 %Jerauld County: 10.2 %Jones County: 10.1 %Kingsbury County: 10.7 %Lake County: 10 %Lawrence County: 12.1 %Lincoln County: 7.5 %Lyman County: 17.2 %McCook County: 12.1 %McPherson County: 8.7 %Marshall County: 12 %Meade County: 9.6 %Mellette County: 19.2 %Miner County: 11.2 %Minnehaha County: 11.1 %Moody County: 13.1 %Oglala Lakota County: 18.9 %Pennington County: 12.5 %Perkins County: 12.7 %Potter County: 8.7 %Roberts County: 17.5 %Sanborn County: 12 %Spink County: 11.7 %Stanley County: 11.4 %Sully County: 7.2 %Todd County: 19.8 %Tripp County: 18.9 %Turner County: 10.1 %Union County: 7.8 %Walworth County: 14.1 %Yankton County: 11 %Ziebach County: 15.3 %
  • Under 10
  • 10 to 11
  • 11 to 12
  • 12 to 13
  • 13 to 17
  • 17 and over
%, 2022. 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, 2022

Dewey County: 23.9 %Dewey County23.9Jackson County: 21.1 %Jackson County21.1Todd County: 19.8 %Todd County19.8Mellette County: 19.2 %Mellette County19.2Oglala Lakota County: 18.9 %Oglala Lakota County18.9Tripp County: 18.9 %Tripp County18.9Bennett County: 18.8 %Bennett County18.8Buffalo County: 18.1 %Buffalo County18.1Charles Mix County: 17.8 %Charles Mix County17.8Gregory County: 17.8 %Gregory County17.8Roberts County: 17.5 %Roberts County17.5Lyman County: 17.2 %Lyman County17.2Butte County: 16.5 %Butte County16.5Beadle County: 15.4 %Beadle County15.4Brule County: 15.3 %Brule County15.3Ziebach County: 15.3 %Ziebach County15.3Corson County: 14.7 %Corson County14.7Day County: 14.3 %Day County14.3Walworth County: 14.1 %Walworth County14.1Fall River County: 14 %Fall River County14Custer County: 13.9 %Custer County13.9Douglas County: 13.2 %Douglas County13.2Moody County: 13.1 %Moody County13.1Hamlin County: 12.7 %Hamlin County12.7Perkins County: 12.7 %Perkins County12.7Harding County: 12.6 %Harding County12.6Aurora County: 12.5 %Aurora County12.5Pennington County: 12.5 %Pennington County12.5Davison County: 12.2 %Davison County12.2Lawrence County: 12.1 %Lawrence County12.1McCook County: 12.1 %McCook County12.1Marshall County: 12 %Marshall County12Sanborn County: 12 %Sanborn County12Codington County: 11.7 %Codington County11.7Spink County: 11.7 %Spink County11.7Haakon County: 11.5 %Haakon County11.5Grant County: 11.4 %Grant County11.4Stanley County: 11.4 %Stanley County11.4Clay County: 11.3 %Clay County11.3Miner County: 11.2 %Miner County11.2Dewey County: 23.9 %Dewey County23.9Jackson County: 21.1 %Jackson County21.1Todd County: 19.8 %Todd County19.8Mellette County: 19.2 %Mellette County19.2Oglala Lakota County: 18.9 %Oglala Lakota County18.9Tripp County: 18.9 %Tripp County18.9Bennett County: 18.8 %Bennett County18.8Buffalo County: 18.1 %Buffalo County18.1Charles Mix County: 17.8 %Charles Mix County17.8Gregory County: 17.8 %Gregory County17.8Roberts County: 17.5 %Roberts County17.5Lyman County: 17.2 %Lyman County17.2Butte County: 16.5 %Butte County16.5Beadle County: 15.4 %Beadle County15.4Brule County: 15.3 %Brule County15.3Ziebach County: 15.3 %Ziebach County15.3Corson County: 14.7 %Corson County14.7Day County: 14.3 %Day County14.3Walworth County: 14.1 %Walworth County14.1Fall River County: 14 %Fall River County14Custer County: 13.9 %Custer County13.9Douglas County: 13.2 %Douglas County13.2Moody County: 13.1 %Moody County13.1Hamlin County: 12.7 %Hamlin County12.7Perkins County: 12.7 %Perkins County12.7Harding County: 12.6 %Harding County12.6Aurora County: 12.5 %Aurora County12.5Pennington County: 12.5 %Pennington County12.5Davison County: 12.2 %Davison County12.2Lawrence County: 12.1 %Lawrence County12.1McCook County: 12.1 %McCook County12.1Marshall County: 12 %Marshall County12Sanborn County: 12 %Sanborn County12Codington County: 11.7 %Codington County11.7Spink County: 11.7 %Spink County11.7Haakon County: 11.5 %Haakon County11.5Grant County: 11.4 %Grant County11.4Stanley County: 11.4 %Stanley County11.4Clay County: 11.3 %Clay County11.3Miner County: 11.2 %Miner County11.2
%. 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

RankCounties2022 (%)Change on 2021
1Dewey County23.9-0.7 pts
2Jackson County21.1-3.2 pts
3Todd County19.8-4.1 pts
4Mellette County19.2-3 pts
5Oglala Lakota County18.9-5.6 pts
5Tripp County18.9-0.2 pts
7Bennett County18.8-4.7 pts
8Buffalo County18.1-7.6 pts
9Charles Mix County17.8-2.9 pts
9Gregory County17.8+0.4 pts
11Roberts County17.5-2.9 pts
12Lyman County17.2-1.5 pts
13Butte County16.5+1 pts
14Beadle County15.4-1.5 pts
15Brule County15.3+0.2 pts
15Ziebach County15.3-5.6 pts
17Corson County14.7-6.5 pts
18Day County14.3-2.3 pts
19Walworth County14.1-0.6 pts
20Fall River County14+0.1 pts
21Custer County13.9-0.3 pts
22Douglas County13.2-1.1 pts
23Moody County13.1-1.7 pts
24Hamlin County12.7-2.3 pts
24Perkins County12.7-0.1 pts
26Harding County12.6-1.6 pts
27Aurora County12.5-2.3 pts
27Pennington County12.5-1.7 pts
29Davison County12.2+0.4 pts
30Lawrence County12.1-1.6 pts
30McCook County12.1-1.8 pts
32Marshall County12-1.3 pts
32Sanborn County12-0.5 pts
34Codington County11.7-0.4 pts
34Spink County11.7-1.6 pts
36Haakon County11.5-0.6 pts
37Grant County11.4-2.2 pts
37Stanley County11.4+0.2 pts
39Clay County11.3-3.7 pts
40Miner County11.2-1.1 pts
41Brown County11.1-1.3 pts
41Faulk County11.1-2.2 pts
41Minnehaha County11.1-2 pts
44Yankton County11-1.6 pts
45Hand County10.9+1.8 pts
46Clark County10.8-2.8 pts
47Kingsbury County10.7-2 pts
48Campbell County10.6+0.1 pts
48Deuel County10.6-0.6 pts
50Jerauld County10.2-0.8 pts
51Edmunds County10.1-0.6 pts
51Hyde County10.1-2.4 pts
51Jones County10.1-1.8 pts
51Turner County10.1-1.6 pts
55Bon Homme County10-3.1 pts
55Hutchinson County10-3.1 pts
55Lake County10-1.5 pts
58Meade County9.6-1.3 pts
59Hanson County9.3-3.2 pts
60McPherson County8.7-2 pts
60Potter County8.7-1.5 pts
62Hughes County8.6-1.4 pts
63Brookings County8.5-1 pts
64Union County7.8-1.3 pts
65Lincoln County7.5-1.6 pts
66Sully County7.2-0.6 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-2022-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), 2022) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-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), 2022. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2022. 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), 2022. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2022.

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), 2022 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2022,
  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), 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2022-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2022. 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-2022-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), 2022
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-2022-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2022.
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-2022-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)?

Dewey County, with 23.9% in 2022, according to the U.S. Census Bureau.

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

Sully County, with 7.2% in 2022.

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