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 2016, at 70.6%. Jerauld County had the lowest, at 48.3%. The median was 55.4% and the figure for South Dakota was 59.3%. Source: the U.S. Census Bureau.

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Highest70.6Clay County
Lowest48.3Jerauld County
Median55.466 counties
South Dakota59.3History

Map of counties, 2016

Aurora County: 52.2 %Beadle County: 56.3 %Bennett County: 54.4 %Bon Homme County: 60.8 %Brookings County: 68.1 %Brown County: 59.7 %Brule County: 56.5 %Buffalo County: 52.5 %Butte County: 56.8 %Campbell County: 56.6 %Charles Mix County: 53.1 %Clark County: 54.7 %Clay County: 70.6 %Codington County: 59.1 %Corson County: 54.5 %Custer County: 55.4 %Davison County: 59.3 %Day County: 52.1 %Deuel County: 55.7 %Dewey County: 56.4 %Douglas County: 51.7 %Edmunds County: 55 %Fall River County: 53.3 %Faulk County: 54.2 %Grant County: 55.7 %Gregory County: 52 %Haakon County: 54.7 %Hamlin County: 50.8 %Hand County: 54.2 %Hanson County: 53.3 %Harding County: 58.7 %Hughes County: 60.3 %Hutchinson County: 52.6 %Hyde County: 55.9 %Jackson County: 54.5 %Jerauld County: 48.3 %Jones County: 56.7 %Kingsbury County: 55.2 %Lake County: 60.3 %Lawrence County: 60.9 %Lincoln County: 59.5 %Lyman County: 55.3 %McCook County: 55.2 %McPherson County: 50.8 %Marshall County: 56.3 %Meade County: 60 %Mellette County: 51.8 %Miner County: 54.1 %Minnehaha County: 61.8 %Moody County: 56.3 %Oglala Lakota County: 55.5 %Pennington County: 60.5 %Perkins County: 55.2 %Potter County: 50.2 %Roberts County: 53.2 %Sanborn County: 57.1 %Spink County: 56.7 %Stanley County: 56.7 %Sully County: 58.4 %Todd County: 52.2 %Tripp County: 55.1 %Turner County: 55.8 %Union County: 57.9 %Walworth County: 53 %Yankton County: 60.5 %Ziebach County: 53.9 %
  • Under 53
  • 53 to 54
  • 54 to 55
  • 55 to 57
  • 57 to 60
  • 60 and over
%, 2016. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2016

Clay County: 70.6 %Clay County70.6Brookings County: 68.1 %Brookings County68.1Minnehaha County: 61.8 %Minnehaha County61.8Lawrence County: 60.9 %Lawrence County60.9Bon Homme County: 60.8 %Bon Homme County60.8Yankton County: 60.5 %Yankton County60.5Pennington County: 60.5 %Pennington County60.5Hughes County: 60.3 %Hughes County60.3Lake County: 60.3 %Lake County60.3Meade County: 60 %Meade County60Brown County: 59.7 %Brown County59.7Lincoln County: 59.5 %Lincoln County59.5Davison County: 59.3 %Davison County59.3Codington County: 59.1 %Codington County59.1Harding County: 58.7 %Harding County58.7Sully County: 58.4 %Sully County58.4Union County: 57.9 %Union County57.9Sanborn County: 57.1 %Sanborn County57.1Butte County: 56.8 %Butte County56.8Stanley County: 56.7 %Stanley County56.7Spink County: 56.7 %Spink County56.7Jones County: 56.7 %Jones County56.7Campbell County: 56.6 %Campbell County56.6Brule County: 56.5 %Brule County56.5Dewey County: 56.4 %Dewey County56.4Marshall County: 56.3 %Marshall County56.3Moody County: 56.3 %Moody County56.3Beadle County: 56.3 %Beadle County56.3Hyde County: 55.9 %Hyde County55.9Turner County: 55.8 %Turner County55.8Grant County: 55.7 %Grant County55.7Deuel County: 55.7 %Deuel County55.7Oglala Lakota County: 55.5 %Oglala Lakota County55.5Custer County: 55.4 %Custer County55.4Lyman County: 55.3 %Lyman County55.3Perkins County: 55.2 %Perkins County55.2Kingsbury County: 55.2 %Kingsbury County55.2McCook County: 55.2 %McCook County55.2Tripp County: 55.1 %Tripp County55.1Edmunds County: 55 %Edmunds County55Clay County: 70.6 %Clay County70.6Brookings County: 68.1 %Brookings County68.1Minnehaha County: 61.8 %Minnehaha County61.8Lawrence County: 60.9 %Lawrence County60.9Bon Homme County: 60.8 %Bon Homme County60.8Yankton County: 60.5 %Yankton County60.5Pennington County: 60.5 %Pennington County60.5Hughes County: 60.3 %Hughes County60.3Lake County: 60.3 %Lake County60.3Meade County: 60 %Meade County60Brown County: 59.7 %Brown County59.7Lincoln County: 59.5 %Lincoln County59.5Davison County: 59.3 %Davison County59.3Codington County: 59.1 %Codington County59.1Harding County: 58.7 %Harding County58.7Sully County: 58.4 %Sully County58.4Union County: 57.9 %Union County57.9Sanborn County: 57.1 %Sanborn County57.1Butte County: 56.8 %Butte County56.8Stanley County: 56.7 %Stanley County56.7Spink County: 56.7 %Spink County56.7Jones County: 56.7 %Jones County56.7Campbell County: 56.6 %Campbell County56.6Brule County: 56.5 %Brule County56.5Dewey County: 56.4 %Dewey County56.4Marshall County: 56.3 %Marshall County56.3Moody County: 56.3 %Moody County56.3Beadle County: 56.3 %Beadle County56.3Hyde County: 55.9 %Hyde County55.9Turner County: 55.8 %Turner County55.8Grant County: 55.7 %Grant County55.7Deuel County: 55.7 %Deuel County55.7Oglala Lakota County: 55.5 %Oglala Lakota County55.5Custer County: 55.4 %Custer County55.4Lyman County: 55.3 %Lyman County55.3Perkins County: 55.2 %Perkins County55.2Kingsbury County: 55.2 %Kingsbury County55.2McCook County: 55.2 %McCook County55.2Tripp County: 55.1 %Tripp County55.1Edmunds County: 55 %Edmunds County55
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2016 (%)Change on 2015
1Clay County70.6-0.3 pts
2Brookings County68.1-0.4 pts
3Minnehaha County61.8-0.5 pts
4Lawrence County60.9-0.6 pts
5Bon Homme County60.8+0.2 pts
6Yankton County60.5-0.3 pts
7Pennington County60.5-0.5 pts
8Hughes County60.3-0.1 pts
9Lake County60.3-1.1 pts
10Meade County60-0.5 pts
11Brown County59.7-0.4 pts
12Lincoln County59.5-0.2 pts
13Davison County59.3-0.6 pts
14Codington County59.1-0.5 pts
15Harding County58.7-0.8 pts
16Sully County58.4-0.2 pts
17Union County57.9-0.6 pts
18Sanborn County57.1-0.8 pts
19Butte County56.8+0.1 pts
20Stanley County56.7-1.3 pts
21Spink County56.70 pts
22Jones County56.7+0.9 pts
23Campbell County56.6+0.2 pts
24Brule County56.5-1 pts
25Dewey County56.4-0.5 pts
26Marshall County56.3-0.9 pts
27Moody County56.3-0.3 pts
28Beadle County56.3-0.5 pts
29Hyde County55.9+1.1 pts
30Turner County55.8-0.4 pts
31Grant County55.7-0.7 pts
32Deuel County55.7-0.5 pts
33Oglala Lakota County55.5+0.1 pts
34Custer County55.4-0.3 pts
35Lyman County55.3-0.4 pts
36Perkins County55.2-0.3 pts
37Kingsbury County55.2-0.5 pts
38McCook County55.2+0.4 pts
39Tripp County55.1-0.4 pts
40Edmunds County55-0.1 pts
41Haakon County54.7-1.6 pts
42Clark County54.7-0.5 pts
43Jackson County54.5+0.9 pts
44Corson County54.50 pts
45Bennett County54.4-0 pts
46Hand County54.2-0.3 pts
47Faulk County54.2+0.4 pts
48Miner County54.1-1.1 pts
49Ziebach County53.9-0.5 pts
50Fall River County53.3+0.1 pts
51Hanson County53.3+0.8 pts
52Roberts County53.2-0.3 pts
53Charles Mix County53.1+0.2 pts
54Walworth County53-0.8 pts
55Hutchinson County52.6+0.2 pts
56Buffalo County52.5+1 pts
57Todd County52.2+0.2 pts
58Aurora County52.2-0.6 pts
59Day County52.1-1.4 pts
60Gregory County52+0.3 pts
61Mellette County51.8+0.1 pts
62Douglas County51.7-0.8 pts
63McPherson County50.8-0.7 pts
64Hamlin County50.8-0.4 pts
65Potter County50.2-0.8 pts
66Jerauld County48.3-0.3 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, 2016) [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, 2016. 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=2016. 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, 2016. 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=2016.

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, 2016 [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=2016 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2016,
  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, 2016}},
  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=2016. 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, 2016
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=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2016.
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 70.6% in 2016, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Jerauld County, with 48.3% in 2016.

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