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)

Buffalo County had the highest uninsured rate, ages 18 to 64 (US model-based estimate) of 66 counties in 2015, at 30%. Lincoln County had the lowest, at 6.9%. The median was 13.7% and the figure for South Dakota was 13.9%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest30Buffalo County
Lowest6.9Lincoln County
Median13.766 counties
South Dakota13.9History

Map of counties, 2015

Aurora County: 16.1 %Beadle County: 17.8 %Bennett County: 29.7 %Bon Homme County: 13.9 %Brookings County: 12.2 %Brown County: 11.9 %Brule County: 20.4 %Buffalo County: 30 %Butte County: 16.7 %Campbell County: 11.7 %Charles Mix County: 23.9 %Clark County: 14.9 %Clay County: 13.1 %Codington County: 12.2 %Corson County: 26.2 %Custer County: 13.8 %Davison County: 12 %Day County: 18.5 %Deuel County: 12.8 %Dewey County: 29.9 %Douglas County: 14 %Edmunds County: 12 %Fall River County: 14 %Faulk County: 9.7 %Grant County: 12.3 %Gregory County: 18.9 %Haakon County: 13.4 %Hamlin County: 13.2 %Hand County: 11 %Hanson County: 12.8 %Harding County: 13.9 %Hughes County: 12.7 %Hutchinson County: 12.8 %Hyde County: 13.6 %Jackson County: 28.3 %Jerauld County: 12.3 %Jones County: 18.4 %Kingsbury County: 9.7 %Lake County: 10.6 %Lawrence County: 13.4 %Lincoln County: 6.9 %Lyman County: 22.1 %McCook County: 11.5 %McPherson County: 14.6 %Marshall County: 18.6 %Meade County: 13.2 %Mellette County: 23.1 %Miner County: 10.5 %Minnehaha County: 12.5 %Moody County: 16.2 %Oglala Lakota County: 25.8 %Pennington County: 15.6 %Perkins County: 15.6 %Potter County: 12.8 %Roberts County: 21.6 %Sanborn County: 13.3 %Spink County: 13.3 %Stanley County: 13.6 %Sully County: 14.6 %Todd County: 26.3 %Tripp County: 18.8 %Turner County: 11.9 %Union County: 7.8 %Walworth County: 17.1 %Yankton County: 12 %Ziebach County: 24.2 %
  • Under 12
  • 12 to 13
  • 13 to 14
  • 14 to 16
  • 16 to 22
  • 22 and over
%, 2015. 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, 2015

Buffalo County: 30 %Buffalo County30Dewey County: 29.9 %Dewey County29.9Bennett County: 29.7 %Bennett County29.7Jackson County: 28.3 %Jackson County28.3Todd County: 26.3 %Todd County26.3Corson County: 26.2 %Corson County26.2Oglala Lakota County: 25.8 %Oglala Lakota County25.8Ziebach County: 24.2 %Ziebach County24.2Charles Mix County: 23.9 %Charles Mix County23.9Mellette County: 23.1 %Mellette County23.1Lyman County: 22.1 %Lyman County22.1Roberts County: 21.6 %Roberts County21.6Brule County: 20.4 %Brule County20.4Gregory County: 18.9 %Gregory County18.9Tripp County: 18.8 %Tripp County18.8Marshall County: 18.6 %Marshall County18.6Day County: 18.5 %Day County18.5Jones County: 18.4 %Jones County18.4Beadle County: 17.8 %Beadle County17.8Walworth County: 17.1 %Walworth County17.1Butte County: 16.7 %Butte County16.7Moody County: 16.2 %Moody County16.2Aurora County: 16.1 %Aurora County16.1Pennington County: 15.6 %Pennington County15.6Perkins County: 15.6 %Perkins County15.6Clark County: 14.9 %Clark County14.9McPherson County: 14.6 %McPherson County14.6Sully County: 14.6 %Sully County14.6Douglas County: 14 %Douglas County14Fall River County: 14 %Fall River County14Bon Homme County: 13.9 %Bon Homme County13.9Harding County: 13.9 %Harding County13.9Custer County: 13.8 %Custer County13.8Hyde County: 13.6 %Hyde County13.6Stanley County: 13.6 %Stanley County13.6Haakon County: 13.4 %Haakon County13.4Lawrence County: 13.4 %Lawrence County13.4Sanborn County: 13.3 %Sanborn County13.3Spink County: 13.3 %Spink County13.3Hamlin County: 13.2 %Hamlin County13.2Buffalo County: 30 %Buffalo County30Dewey County: 29.9 %Dewey County29.9Bennett County: 29.7 %Bennett County29.7Jackson County: 28.3 %Jackson County28.3Todd County: 26.3 %Todd County26.3Corson County: 26.2 %Corson County26.2Oglala Lakota County: 25.8 %Oglala Lakota County25.8Ziebach County: 24.2 %Ziebach County24.2Charles Mix County: 23.9 %Charles Mix County23.9Mellette County: 23.1 %Mellette County23.1Lyman County: 22.1 %Lyman County22.1Roberts County: 21.6 %Roberts County21.6Brule County: 20.4 %Brule County20.4Gregory County: 18.9 %Gregory County18.9Tripp County: 18.8 %Tripp County18.8Marshall County: 18.6 %Marshall County18.6Day County: 18.5 %Day County18.5Jones County: 18.4 %Jones County18.4Beadle County: 17.8 %Beadle County17.8Walworth County: 17.1 %Walworth County17.1Butte County: 16.7 %Butte County16.7Moody County: 16.2 %Moody County16.2Aurora County: 16.1 %Aurora County16.1Pennington County: 15.6 %Pennington County15.6Perkins County: 15.6 %Perkins County15.6Clark County: 14.9 %Clark County14.9McPherson County: 14.6 %McPherson County14.6Sully County: 14.6 %Sully County14.6Douglas County: 14 %Douglas County14Fall River County: 14 %Fall River County14Bon Homme County: 13.9 %Bon Homme County13.9Harding County: 13.9 %Harding County13.9Custer County: 13.8 %Custer County13.8Hyde County: 13.6 %Hyde County13.6Stanley County: 13.6 %Stanley County13.6Haakon County: 13.4 %Haakon County13.4Lawrence County: 13.4 %Lawrence County13.4Sanborn County: 13.3 %Sanborn County13.3Spink County: 13.3 %Spink County13.3Hamlin County: 13.2 %Hamlin County13.2
%. 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

RankCounties2015 (%)Change on 2014
1Buffalo County30+2.8 pts
2Dewey County29.9+0.9 pts
3Bennett County29.7+2.2 pts
4Jackson County28.3-2.5 pts
5Todd County26.3+1.5 pts
6Corson County26.2-2 pts
7Oglala Lakota County25.8-1.6 pts
8Ziebach County24.2-5 pts
9Charles Mix County23.9+0.3 pts
10Mellette County23.1-3.7 pts
11Lyman County22.1-1.9 pts
12Roberts County21.6-0.1 pts
13Brule County20.4+3.1 pts
14Gregory County18.9-1 pts
15Tripp County18.8-2 pts
16Marshall County18.6-0.1 pts
17Day County18.50 pts
18Jones County18.4-3.8 pts
19Beadle County17.80 pts
20Walworth County17.1+2.4 pts
21Butte County16.7-1.2 pts
22Moody County16.2+0.2 pts
23Aurora County16.1+0.9 pts
24Pennington County15.6+0.1 pts
24Perkins County15.6-3.9 pts
26Clark County14.9-2 pts
27McPherson County14.6-2.1 pts
27Sully County14.6+1.3 pts
29Douglas County14-3.2 pts
29Fall River County14-1.2 pts
31Bon Homme County13.90 pts
31Harding County13.9-4.5 pts
33Custer County13.8+0.3 pts
34Hyde County13.6-0.9 pts
34Stanley County13.6-1.8 pts
36Haakon County13.4-3.2 pts
36Lawrence County13.4-1.9 pts
38Sanborn County13.3-3.6 pts
38Spink County13.3+0.3 pts
40Hamlin County13.2-0.7 pts
40Meade County13.2-1.3 pts
42Clay County13.1-1.8 pts
43Deuel County12.8-0.5 pts
43Hanson County12.8-1.3 pts
43Hutchinson County12.8-1.9 pts
43Potter County12.8-1.7 pts
47Hughes County12.70 pts
48Minnehaha County12.5+0.7 pts
49Grant County12.3-1.2 pts
49Jerauld County12.3-1.8 pts
51Brookings County12.20 pts
51Codington County12.2+0.4 pts
53Davison County12-0.8 pts
53Edmunds County12+0.3 pts
53Yankton County12-0.9 pts
56Brown County11.9+0.7 pts
56Turner County11.9-1 pts
58Campbell County11.7-0.4 pts
59McCook County11.50 pts
60Hand County11-0.5 pts
61Lake County10.6-0.2 pts
62Miner County10.5-1.1 pts
63Faulk County9.7-0.4 pts
63Kingsbury County9.7-1.2 pts
65Union County7.8-0.8 pts
66Lincoln County6.9-0.4 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-2015-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), 2015) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-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), 2015. U.S. Census Bureau, 6 Aug. 2026, https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2015. 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), 2015. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2015.

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), 2015 [Dataset]. Available at: https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2015,
  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), 2015}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/sahie/datasets/time-series/estimates-acs/sahie-2015-csv.zip},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2015. 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-2015-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), 2015
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-2015-csv.zip
L2  - https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-18-64/south-dakota-counties?period=2015.
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-2015-csv.zip. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in South Dakota by uninsured rate, ages 18 to 64 (US model-based estimate) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate_18_64","level":"province","within":"South Dakota","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=uninsured_rate_18_64&level=province&within=South%20Dakota&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

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

Buffalo County, with 30% in 2015, according to the U.S. Census Bureau.

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

Lincoln County, with 6.9% in 2015.

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