Data / Rankings / Population aged 18 to 64 / Counties in South Dakota

Counties in South Dakota by population aged 18 to 64

Clay County had the highest population aged 18 to 64 of 66 counties in 2024, at 69.7%. Jerauld County had the lowest, at 43.3%. The median was 52% and the figure for South Dakota was 57.2%. Source: the U.S. Census Bureau.

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Highest69.7Clay County
Lowest43.3Jerauld County
Median5266 counties
South Dakota57.2History

Map of counties, 2024

Aurora County: 53.5 %Beadle County: 53.4 %Bennett County: 53.8 %Bon Homme County: 58.4 %Brookings County: 64.5 %Brown County: 57.3 %Brule County: 51.9 %Buffalo County: 52.2 %Butte County: 53.4 %Campbell County: 49.2 %Charles Mix County: 52.6 %Clark County: 50.1 %Clay County: 69.7 %Codington County: 57.1 %Corson County: 51.5 %Custer County: 48.2 %Davison County: 56.5 %Day County: 50.2 %Deuel County: 52.3 %Dewey County: 50.3 %Douglas County: 46.8 %Edmunds County: 53.7 %Fall River County: 49.7 %Faulk County: 49 %Grant County: 51.6 %Gregory County: 47.7 %Haakon County: 48.6 %Hamlin County: 50.4 %Hand County: 49.5 %Hanson County: 54.1 %Harding County: 53 %Hughes County: 57 %Hutchinson County: 50.1 %Hyde County: 51 %Jackson County: 50.9 %Jerauld County: 43.3 %Jones County: 49.6 %Kingsbury County: 50.3 %Lake County: 56.2 %Lawrence County: 57.2 %Lincoln County: 59.4 %Lyman County: 55.7 %McCook County: 51.2 %McPherson County: 49.3 %Marshall County: 50 %Meade County: 59.7 %Mellette County: 46.6 %Miner County: 51.1 %Minnehaha County: 60.1 %Moody County: 51.4 %Oglala Lakota County: 56.6 %Pennington County: 58.2 %Perkins County: 48.7 %Potter County: 47 %Roberts County: 49.8 %Sanborn County: 52.1 %Spink County: 52.9 %Stanley County: 55.1 %Sully County: 55.5 %Todd County: 53.6 %Tripp County: 51.2 %Turner County: 52 %Union County: 55.6 %Walworth County: 51.5 %Yankton County: 56.2 %Ziebach County: 57.4 %
  • Under 49
  • 49 to 51
  • 51 to 52
  • 52 to 54
  • 54 to 57
  • 57 and over
%, 2024. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Clay County: 69.7 %Clay County69.7Brookings County: 64.5 %Brookings County64.5Minnehaha County: 60.1 %Minnehaha County60.1Meade County: 59.7 %Meade County59.7Lincoln County: 59.4 %Lincoln County59.4Bon Homme County: 58.4 %Bon Homme County58.4Pennington County: 58.2 %Pennington County58.2Ziebach County: 57.4 %Ziebach County57.4Brown County: 57.3 %Brown County57.3Lawrence County: 57.2 %Lawrence County57.2Codington County: 57.1 %Codington County57.1Hughes County: 57 %Hughes County57Oglala Lakota County: 56.6 %Oglala Lakota County56.6Davison County: 56.5 %Davison County56.5Yankton County: 56.2 %Yankton County56.2Lake County: 56.2 %Lake County56.2Lyman County: 55.7 %Lyman County55.7Union County: 55.6 %Union County55.6Sully County: 55.5 %Sully County55.5Stanley County: 55.1 %Stanley County55.1Hanson County: 54.1 %Hanson County54.1Bennett County: 53.8 %Bennett County53.8Edmunds County: 53.7 %Edmunds County53.7Todd County: 53.6 %Todd County53.6Aurora County: 53.5 %Aurora County53.5Butte County: 53.4 %Butte County53.4Beadle County: 53.4 %Beadle County53.4Harding County: 53 %Harding County53Spink County: 52.9 %Spink County52.9Charles Mix County: 52.6 %Charles Mix County52.6Deuel County: 52.3 %Deuel County52.3Buffalo County: 52.2 %Buffalo County52.2Sanborn County: 52.1 %Sanborn County52.1Turner County: 52 %Turner County52Brule County: 51.9 %Brule County51.9Grant County: 51.6 %Grant County51.6Corson County: 51.5 %Corson County51.5Walworth County: 51.5 %Walworth County51.5Moody County: 51.4 %Moody County51.4Tripp County: 51.2 %Tripp County51.2Clay County: 69.7 %Clay County69.7Brookings County: 64.5 %Brookings County64.5Minnehaha County: 60.1 %Minnehaha County60.1Meade County: 59.7 %Meade County59.7Lincoln County: 59.4 %Lincoln County59.4Bon Homme County: 58.4 %Bon Homme County58.4Pennington County: 58.2 %Pennington County58.2Ziebach County: 57.4 %Ziebach County57.4Brown County: 57.3 %Brown County57.3Lawrence County: 57.2 %Lawrence County57.2Codington County: 57.1 %Codington County57.1Hughes County: 57 %Hughes County57Oglala Lakota County: 56.6 %Oglala Lakota County56.6Davison County: 56.5 %Davison County56.5Yankton County: 56.2 %Yankton County56.2Lake County: 56.2 %Lake County56.2Lyman County: 55.7 %Lyman County55.7Union County: 55.6 %Union County55.6Sully County: 55.5 %Sully County55.5Stanley County: 55.1 %Stanley County55.1Hanson County: 54.1 %Hanson County54.1Bennett County: 53.8 %Bennett County53.8Edmunds County: 53.7 %Edmunds County53.7Todd County: 53.6 %Todd County53.6Aurora County: 53.5 %Aurora County53.5Butte County: 53.4 %Butte County53.4Beadle County: 53.4 %Beadle County53.4Harding County: 53 %Harding County53Spink County: 52.9 %Spink County52.9Charles Mix County: 52.6 %Charles Mix County52.6Deuel County: 52.3 %Deuel County52.3Buffalo County: 52.2 %Buffalo County52.2Sanborn County: 52.1 %Sanborn County52.1Turner County: 52 %Turner County52Brule County: 51.9 %Brule County51.9Grant County: 51.6 %Grant County51.6Corson County: 51.5 %Corson County51.5Walworth County: 51.5 %Walworth County51.5Moody County: 51.4 %Moody County51.4Tripp County: 51.2 %Tripp County51.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Clay County69.7+0.2 pts
2Brookings County64.5-0 pts
3Minnehaha County60.1-0 pts
4Meade County59.70 pts
5Lincoln County59.4+0.4 pts
6Bon Homme County58.4-0.5 pts
7Pennington County58.2-0.2 pts
8Ziebach County57.4+0.9 pts
9Brown County57.3-0.2 pts
10Lawrence County57.20 pts
11Codington County57.1-0.3 pts
12Hughes County57+0.3 pts
13Oglala Lakota County56.6+0.5 pts
14Davison County56.50 pts
15Yankton County56.2-0.4 pts
16Lake County56.2-0.5 pts
17Lyman County55.7+0.2 pts
18Union County55.6-0 pts
19Sully County55.5-0.2 pts
20Stanley County55.1+0.7 pts
21Hanson County54.10 pts
22Bennett County53.8-0 pts
23Edmunds County53.7-0.3 pts
24Todd County53.6+1.5 pts
25Aurora County53.5+0.7 pts
26Butte County53.4-0.2 pts
27Beadle County53.4-0.3 pts
28Harding County53-0.4 pts
29Spink County52.9-0.4 pts
30Charles Mix County52.6+0.2 pts
31Deuel County52.3-0.5 pts
32Buffalo County52.2+0.2 pts
33Sanborn County52.1-1 pts
34Turner County52+0.2 pts
35Brule County51.9-0.9 pts
36Grant County51.6-0.5 pts
37Corson County51.5-0.3 pts
38Walworth County51.5-0.3 pts
39Moody County51.4-0.7 pts
40Tripp County51.2-0.8 pts
41McCook County51.2-0.7 pts
42Miner County51.1+0.5 pts
43Hyde County51-0 pts
44Jackson County50.9-0.3 pts
45Hamlin County50.4+1.1 pts
46Dewey County50.3-0.5 pts
47Kingsbury County50.3-0.3 pts
48Day County50.2-0.2 pts
49Hutchinson County50.1-0.4 pts
50Clark County50.1-0.3 pts
51Marshall County500 pts
52Roberts County49.8+0.1 pts
53Fall River County49.7-0.5 pts
54Jones County49.6-0.8 pts
55Hand County49.5-0.6 pts
56McPherson County49.3-0.8 pts
57Campbell County49.2-1.1 pts
58Faulk County49-0.3 pts
59Perkins County48.7-1.3 pts
60Haakon County48.6-1.5 pts
61Custer County48.2-0.5 pts
62Gregory County47.7+0.2 pts
63Potter County47-0.9 pts
64Douglas County46.8-0.2 pts
65Mellette County46.6-3 pts
66Jerauld County43.3-0.4 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. 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). Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in South Dakota by population aged 18 to 64, 2024) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in South Dakota by population aged 18 to 64, 2024. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2024. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in South Dakota by population aged 18 to 64, 2024. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2024.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in South Dakota by population aged 18 to 64, 2024 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2024,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in South Dakota by population aged 18 to 64, 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2024. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in South Dakota by population aged 18 to 64, 2024
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2024.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest population aged 18 to 64?

Clay County, with 69.7% in 2024, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Jerauld County, with 43.3% in 2024.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in South Dakota: more rankings