Data / Rankings / Population aged 65 and over / Counties in South Dakota

Counties in South Dakota by share of population aged 65 and over

Custer County had the highest share of population aged 65 and over of 66 counties in 2020, at 32.8%. Oglala Lakota County had the lowest, at 7.4%. The median was 21.2% and the figure for South Dakota was 17.7%. Source: the U.S. Census Bureau.

Highest32.8Custer County
Lowest7.4Oglala Lakota County
Median21.266 counties
South Dakota17.7History

Top 40 counties, 2020

CSVChart (SVG)

Custer CountyCuster County: 32.8 %32.8Fall River CountyFall River County: 32.7 %32.7Potter CountyPotter County: 31.1 %31.1Jerauld CountyJerauld County: 30.3 %30.3McPherson CountyMcPherson County: 29.2 %29.2Campbell CountyCampbell County: 27.4 %27.4Faulk CountyFaulk County: 27.3 %27.3Gregory CountyGregory County: 27.2 %27.2Perkins CountyPerkins County: 26.7 %26.7Douglas CountyDouglas County: 26.6 %26.6Hand CountyHand County: 26.5 %26.5Day CountyDay County: 26.4 %26.4Hyde CountyHyde County: 25.6 %25.6Miner CountyMiner County: 25.3 %25.3Walworth CountyWalworth County: 25 %25Kingsbury CountyKingsbury County: 24.4 %24.4Grant CountyGrant County: 24.2 %24.2Haakon CountyHaakon County: 23.8 %23.8Lawrence CountyLawrence County: 23.5 %23.5Edmunds CountyEdmunds County: 23.5 %23.5Hutchinson CountyHutchinson County: 23.4 %23.4Marshall CountyMarshall County: 23.3 %23.3Jones CountyJones County: 23.2 %23.2Spink CountySpink County: 22.3 %22.3Sully CountySully County: 22.1 %22.1Tripp CountyTripp County: 21.9 %21.9Aurora CountyAurora County: 21.8 %21.8Deuel CountyDeuel County: 21.8 %21.8Turner CountyTurner County: 21.6 %21.6Bon Homme CountyBon Homme County: 21.5 %21.5Sanborn CountySanborn County: 21.5 %21.5Clark CountyClark County: 21.4 %21.4Brule CountyBrule County: 21.2 %21.2Butte CountyButte County: 21.1 %21.1Roberts CountyRoberts County: 20.8 %20.8Stanley CountyStanley County: 20.8 %20.8Yankton CountyYankton County: 20.5 %20.5McCook CountyMcCook County: 20.4 %20.4Harding CountyHarding County: 20.3 %20.3Moody CountyMoody County: 20 %20
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2020 (%)
1Custer County32.8
2Fall River County32.7
3Potter County31.1
4Jerauld County30.3
5McPherson County29.2
6Campbell County27.4
7Faulk County27.3
8Gregory County27.2
9Perkins County26.7
10Douglas County26.6
11Hand County26.5
12Day County26.4
13Hyde County25.6
14Miner County25.3
15Walworth County25
16Kingsbury County24.4
17Grant County24.2
18Haakon County23.8
19Lawrence County23.5
20Edmunds County23.5
21Hutchinson County23.4
22Marshall County23.3
23Jones County23.2
24Spink County22.3
25Sully County22.1
26Tripp County21.9
27Aurora County21.8
28Deuel County21.8
29Turner County21.6
30Bon Homme County21.5
31Sanborn County21.5
32Clark County21.4
33Brule County21.2
34Butte County21.1
35Roberts County20.8
36Stanley County20.8
37Yankton County20.5
38McCook County20.4
39Harding County20.3
40Moody County20
41Lake County20
42Davison County19.8
43Union County18.8
44Codington County18.7
45Pennington County18.6
46Brown County18.2
47Hughes County18.1
48Charles Mix County18
49Hamlin County17.8
50Hanson County17.8
51Beadle County17.6
52Meade County16.6
53Mellette County16.3
54Lyman County16.2
55Minnehaha County14.6
56Bennett County14.4
57Jackson County14.1
58Brookings County13.5
59Lincoln County13.4
60Clay County13.1
61Corson County12.6
62Dewey County11.5
63Buffalo County10.7
64Ziebach County10.5
65Todd County8.1
66Oglala Lakota County7.4

Other periods

About this ranking

Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.

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. Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.

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Rank Counties in South Dakota by share of population aged 65 and over using official data, and cite the source.
rank_places {"indicator":"population_65_plus_share","level":"province","within":"South Dakota","limit":10}
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Questions

Which county has the highest share of population aged 65 and over?

Custer County, with 32.8% in 2020, according to the U.S. Census Bureau.

Which county has the lowest share of population aged 65 and over?

Oglala Lakota County, with 7.4% 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, Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. Retrieved 2026-10-09.

Population aged 65 and over: other rankings

Counties in South Dakota: more rankings