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 2023, at 69.5%. Jerauld County had the lowest, at 43.7%. The median was 52.1% and the figure for South Dakota was 57.2%. Source: the U.S. Census Bureau.

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Highest69.5Clay County
Lowest43.7Jerauld County
Median52.166 counties
South Dakota57.2History

Map of counties, 2023

Aurora County: 52.8 %Beadle County: 53.7 %Bennett County: 53.9 %Bon Homme County: 58.9 %Brookings County: 64.5 %Brown County: 57.5 %Brule County: 52.8 %Buffalo County: 52.1 %Butte County: 53.7 %Campbell County: 50.3 %Charles Mix County: 52.4 %Clark County: 50.3 %Clay County: 69.5 %Codington County: 57.3 %Corson County: 51.8 %Custer County: 48.7 %Davison County: 56.5 %Day County: 50.4 %Deuel County: 52.8 %Dewey County: 50.8 %Douglas County: 47 %Edmunds County: 53.9 %Fall River County: 50.2 %Faulk County: 49.3 %Grant County: 52.1 %Gregory County: 47.5 %Haakon County: 50.1 %Hamlin County: 49.4 %Hand County: 50 %Hanson County: 54.1 %Harding County: 53.4 %Hughes County: 56.7 %Hutchinson County: 50.5 %Hyde County: 51.1 %Jackson County: 51.2 %Jerauld County: 43.7 %Jones County: 50.3 %Kingsbury County: 50.6 %Lake County: 56.7 %Lawrence County: 57.2 %Lincoln County: 59.1 %Lyman County: 55.6 %McCook County: 51.8 %McPherson County: 50.1 %Marshall County: 50 %Meade County: 59.6 %Mellette County: 49.5 %Miner County: 50.6 %Minnehaha County: 60.1 %Moody County: 52.1 %Oglala Lakota County: 56.1 %Pennington County: 58.4 %Perkins County: 50.1 %Potter County: 47.9 %Roberts County: 49.7 %Sanborn County: 53.1 %Spink County: 53.4 %Stanley County: 54.5 %Sully County: 55.7 %Todd County: 52.1 %Tripp County: 52 %Turner County: 51.8 %Union County: 55.7 %Walworth County: 51.7 %Yankton County: 56.6 %Ziebach County: 56.5 %
  • Under 50
  • 50 to 51
  • 51 to 52
  • 52 to 54
  • 54 to 57
  • 57 and over
%, 2023. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2023

Clay County: 69.5 %Clay County69.5Brookings County: 64.5 %Brookings County64.5Minnehaha County: 60.1 %Minnehaha County60.1Meade County: 59.6 %Meade County59.6Lincoln County: 59.1 %Lincoln County59.1Bon Homme County: 58.9 %Bon Homme County58.9Pennington County: 58.4 %Pennington County58.4Brown County: 57.5 %Brown County57.5Codington County: 57.3 %Codington County57.3Lawrence County: 57.2 %Lawrence County57.2Hughes County: 56.7 %Hughes County56.7Lake County: 56.7 %Lake County56.7Yankton County: 56.6 %Yankton County56.6Ziebach County: 56.5 %Ziebach County56.5Davison County: 56.5 %Davison County56.5Oglala Lakota County: 56.1 %Oglala Lakota County56.1Sully County: 55.7 %Sully County55.7Union County: 55.7 %Union County55.7Lyman County: 55.6 %Lyman County55.6Stanley County: 54.5 %Stanley County54.5Hanson County: 54.1 %Hanson County54.1Edmunds County: 53.9 %Edmunds County53.9Bennett County: 53.9 %Bennett County53.9Beadle County: 53.7 %Beadle County53.7Butte County: 53.7 %Butte County53.7Spink County: 53.4 %Spink County53.4Harding County: 53.4 %Harding County53.4Sanborn County: 53.1 %Sanborn County53.1Aurora County: 52.8 %Aurora County52.8Brule County: 52.8 %Brule County52.8Deuel County: 52.8 %Deuel County52.8Charles Mix County: 52.4 %Charles Mix County52.4Grant County: 52.1 %Grant County52.1Moody County: 52.1 %Moody County52.1Buffalo County: 52.1 %Buffalo County52.1Todd County: 52.1 %Todd County52.1Tripp County: 52 %Tripp County52McCook County: 51.8 %McCook County51.8Corson County: 51.8 %Corson County51.8Turner County: 51.8 %Turner County51.8Clay County: 69.5 %Clay County69.5Brookings County: 64.5 %Brookings County64.5Minnehaha County: 60.1 %Minnehaha County60.1Meade County: 59.6 %Meade County59.6Lincoln County: 59.1 %Lincoln County59.1Bon Homme County: 58.9 %Bon Homme County58.9Pennington County: 58.4 %Pennington County58.4Brown County: 57.5 %Brown County57.5Codington County: 57.3 %Codington County57.3Lawrence County: 57.2 %Lawrence County57.2Hughes County: 56.7 %Hughes County56.7Lake County: 56.7 %Lake County56.7Yankton County: 56.6 %Yankton County56.6Ziebach County: 56.5 %Ziebach County56.5Davison County: 56.5 %Davison County56.5Oglala Lakota County: 56.1 %Oglala Lakota County56.1Sully County: 55.7 %Sully County55.7Union County: 55.7 %Union County55.7Lyman County: 55.6 %Lyman County55.6Stanley County: 54.5 %Stanley County54.5Hanson County: 54.1 %Hanson County54.1Edmunds County: 53.9 %Edmunds County53.9Bennett County: 53.9 %Bennett County53.9Beadle County: 53.7 %Beadle County53.7Butte County: 53.7 %Butte County53.7Spink County: 53.4 %Spink County53.4Harding County: 53.4 %Harding County53.4Sanborn County: 53.1 %Sanborn County53.1Aurora County: 52.8 %Aurora County52.8Brule County: 52.8 %Brule County52.8Deuel County: 52.8 %Deuel County52.8Charles Mix County: 52.4 %Charles Mix County52.4Grant County: 52.1 %Grant County52.1Moody County: 52.1 %Moody County52.1Buffalo County: 52.1 %Buffalo County52.1Todd County: 52.1 %Todd County52.1Tripp County: 52 %Tripp County52McCook County: 51.8 %McCook County51.8Corson County: 51.8 %Corson County51.8Turner County: 51.8 %Turner County51.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Clay County69.5-0.1 pts
2Brookings County64.5-0 pts
3Minnehaha County60.1-0.1 pts
4Meade County59.6-0.2 pts
5Lincoln County59.1+0.5 pts
6Bon Homme County58.9-0.2 pts
7Pennington County58.4-0.1 pts
8Brown County57.5-0.3 pts
9Codington County57.3-0.3 pts
10Lawrence County57.2-0.2 pts
11Hughes County56.7-0 pts
12Lake County56.7-0.7 pts
13Yankton County56.6-0.5 pts
14Ziebach County56.5-0.6 pts
15Davison County56.5-0.2 pts
16Oglala Lakota County56.1+0.5 pts
17Sully County55.7-0.5 pts
18Union County55.7-0.4 pts
19Lyman County55.6+0.9 pts
20Stanley County54.5+0.3 pts
21Hanson County54.1-0.3 pts
22Edmunds County53.9-0.1 pts
23Bennett County53.9-0.4 pts
24Beadle County53.7-0.5 pts
25Butte County53.7-0 pts
26Spink County53.4+0.2 pts
27Harding County53.4-0.8 pts
28Sanborn County53.1+0.2 pts
29Aurora County52.8+0.5 pts
30Brule County52.8-1.1 pts
31Deuel County52.8-0.4 pts
32Charles Mix County52.40 pts
33Grant County52.1-0.5 pts
34Moody County52.1-0.8 pts
35Buffalo County52.1+0.2 pts
36Todd County52.1+0.9 pts
37Tripp County52-1.3 pts
38McCook County51.8-0.9 pts
39Corson County51.8-0.1 pts
40Turner County51.8-1 pts
41Walworth County51.7-0.6 pts
42Jackson County51.2+0.7 pts
43Hyde County51.1-1 pts
44Dewey County50.8-3 pts
45Miner County50.6-1.1 pts
46Kingsbury County50.6-0.7 pts
47Hutchinson County50.5-0 pts
48Day County50.40 pts
49Jones County50.30 pts
50Clark County50.3-0.4 pts
51Campbell County50.3-0.6 pts
52Fall River County50.2-0.3 pts
53McPherson County50.1-0.1 pts
54Haakon County50.1-1.6 pts
55Perkins County50.1-1.3 pts
56Hand County50-0.7 pts
57Marshall County50-0.9 pts
58Roberts County49.7-0.4 pts
59Mellette County49.5-1.1 pts
60Hamlin County49.4-0 pts
61Faulk County49.3-0.8 pts
62Custer County48.7-0.9 pts
63Potter County47.9-1.3 pts
64Gregory County47.5-0.3 pts
65Douglas County47-1.4 pts
66Jerauld County43.7-1.4 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, 2023) [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, 2023. 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=2023. 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, 2023. 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=2023.

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, 2023 [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=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2023,
  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, 2023}},
  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=2023. 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, 2023
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=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2023.
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 69.5% in 2023, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Jerauld County, with 43.7% 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, 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