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 2014, at 71%. McPherson County had the lowest, at 50.7%. The median was 56.2% and the figure for South Dakota was 60.1%. Source: the U.S. Census Bureau.

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Highest71Clay County
Lowest50.7McPherson County
Median56.266 counties
South Dakota60.1History

Map of counties, 2014

Aurora County: 52.7 %Beadle County: 57.4 %Bennett County: 53.8 %Bon Homme County: 60.9 %Brookings County: 69.4 %Brown County: 60.3 %Brule County: 57.9 %Buffalo County: 51.4 %Butte County: 57.3 %Campbell County: 56.7 %Charles Mix County: 53 %Clark County: 56.3 %Clay County: 71 %Codington County: 60.1 %Corson County: 55.5 %Custer County: 56.6 %Davison County: 60.1 %Day County: 53.7 %Deuel County: 56.5 %Dewey County: 57.1 %Douglas County: 52.8 %Edmunds County: 55.5 %Fall River County: 54.7 %Faulk County: 54.4 %Grant County: 57.4 %Gregory County: 52.5 %Haakon County: 54.9 %Hamlin County: 51.3 %Hand County: 54.9 %Hanson County: 52.4 %Harding County: 60.8 %Hughes County: 61.1 %Hutchinson County: 52.3 %Hyde County: 55.3 %Jackson County: 53.7 %Jerauld County: 51.2 %Jones County: 58.5 %Kingsbury County: 56.1 %Lake County: 62.1 %Lawrence County: 62.2 %Lincoln County: 60.2 %Lyman County: 56 %McCook County: 55.1 %McPherson County: 50.7 %Marshall County: 58.5 %Meade County: 61.1 %Mellette County: 53 %Miner County: 54.4 %Minnehaha County: 62.8 %Moody County: 57.5 %Oglala Lakota County: 55.5 %Pennington County: 61.4 %Perkins County: 55.7 %Potter County: 51.5 %Roberts County: 53.8 %Sanborn County: 58.5 %Spink County: 56.5 %Stanley County: 59.1 %Sully County: 59.5 %Todd County: 52.8 %Tripp County: 56.1 %Turner County: 56.3 %Union County: 58.8 %Walworth County: 53.3 %Yankton County: 61.3 %Ziebach County: 53.6 %
  • Under 53
  • 53 to 55
  • 55 to 56
  • 56 to 58
  • 58 to 60
  • 60 and over
%, 2014. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2014

Clay County: 71 %Clay County71Brookings County: 69.4 %Brookings County69.4Minnehaha County: 62.8 %Minnehaha County62.8Lawrence County: 62.2 %Lawrence County62.2Lake County: 62.1 %Lake County62.1Pennington County: 61.4 %Pennington County61.4Yankton County: 61.3 %Yankton County61.3Meade County: 61.1 %Meade County61.1Hughes County: 61.1 %Hughes County61.1Bon Homme County: 60.9 %Bon Homme County60.9Harding County: 60.8 %Harding County60.8Brown County: 60.3 %Brown County60.3Lincoln County: 60.2 %Lincoln County60.2Codington County: 60.1 %Codington County60.1Davison County: 60.1 %Davison County60.1Sully County: 59.5 %Sully County59.5Stanley County: 59.1 %Stanley County59.1Union County: 58.8 %Union County58.8Sanborn County: 58.5 %Sanborn County58.5Marshall County: 58.5 %Marshall County58.5Jones County: 58.5 %Jones County58.5Brule County: 57.9 %Brule County57.9Moody County: 57.5 %Moody County57.5Beadle County: 57.4 %Beadle County57.4Grant County: 57.4 %Grant County57.4Butte County: 57.3 %Butte County57.3Dewey County: 57.1 %Dewey County57.1Campbell County: 56.7 %Campbell County56.7Custer County: 56.6 %Custer County56.6Spink County: 56.5 %Spink County56.5Deuel County: 56.5 %Deuel County56.5Turner County: 56.3 %Turner County56.3Clark County: 56.3 %Clark County56.3Tripp County: 56.1 %Tripp County56.1Kingsbury County: 56.1 %Kingsbury County56.1Lyman County: 56 %Lyman County56Perkins County: 55.7 %Perkins County55.7Corson County: 55.5 %Corson County55.5Edmunds County: 55.5 %Edmunds County55.5Oglala Lakota County: 55.5 %Oglala Lakota County55.5Clay County: 71 %Clay County71Brookings County: 69.4 %Brookings County69.4Minnehaha County: 62.8 %Minnehaha County62.8Lawrence County: 62.2 %Lawrence County62.2Lake County: 62.1 %Lake County62.1Pennington County: 61.4 %Pennington County61.4Yankton County: 61.3 %Yankton County61.3Meade County: 61.1 %Meade County61.1Hughes County: 61.1 %Hughes County61.1Bon Homme County: 60.9 %Bon Homme County60.9Harding County: 60.8 %Harding County60.8Brown County: 60.3 %Brown County60.3Lincoln County: 60.2 %Lincoln County60.2Codington County: 60.1 %Codington County60.1Davison County: 60.1 %Davison County60.1Sully County: 59.5 %Sully County59.5Stanley County: 59.1 %Stanley County59.1Union County: 58.8 %Union County58.8Sanborn County: 58.5 %Sanborn County58.5Marshall County: 58.5 %Marshall County58.5Jones County: 58.5 %Jones County58.5Brule County: 57.9 %Brule County57.9Moody County: 57.5 %Moody County57.5Beadle County: 57.4 %Beadle County57.4Grant County: 57.4 %Grant County57.4Butte County: 57.3 %Butte County57.3Dewey County: 57.1 %Dewey County57.1Campbell County: 56.7 %Campbell County56.7Custer County: 56.6 %Custer County56.6Spink County: 56.5 %Spink County56.5Deuel County: 56.5 %Deuel County56.5Turner County: 56.3 %Turner County56.3Clark County: 56.3 %Clark County56.3Tripp County: 56.1 %Tripp County56.1Kingsbury County: 56.1 %Kingsbury County56.1Lyman County: 56 %Lyman County56Perkins County: 55.7 %Perkins County55.7Corson County: 55.5 %Corson County55.5Edmunds County: 55.5 %Edmunds County55.5Oglala Lakota County: 55.5 %Oglala Lakota County55.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2014 (%)Change on 2013
1Clay County71-0.8 pts
2Brookings County69.4-0.6 pts
3Minnehaha County62.8-0.4 pts
4Lawrence County62.2-0.9 pts
5Lake County62.1-0.1 pts
6Pennington County61.4-0.4 pts
7Yankton County61.3-0.2 pts
8Meade County61.1-0.3 pts
9Hughes County61.1-0.7 pts
10Bon Homme County60.9-0.4 pts
11Harding County60.8-1.3 pts
12Brown County60.3-0.4 pts
13Lincoln County60.2-0.4 pts
14Codington County60.1-0.2 pts
15Davison County60.1-0.2 pts
16Sully County59.5-0.7 pts
17Stanley County59.1-0.4 pts
18Union County58.8-0.5 pts
19Sanborn County58.5-0.4 pts
20Marshall County58.5+0.2 pts
21Jones County58.5-0.4 pts
22Brule County57.9+0.2 pts
23Moody County57.5-0.9 pts
24Beadle County57.4-0.6 pts
25Grant County57.4-0.4 pts
26Butte County57.3-0.8 pts
27Dewey County57.1-0.1 pts
28Campbell County56.7-0 pts
29Custer County56.6-1.5 pts
30Spink County56.5-0 pts
31Deuel County56.5-0.6 pts
32Turner County56.3-0.4 pts
33Clark County56.3+0.1 pts
34Tripp County56.1+0.4 pts
35Kingsbury County56.1-0.2 pts
36Lyman County56-0.4 pts
37Perkins County55.7+0.2 pts
38Corson County55.50 pts
39Edmunds County55.5+0.1 pts
40Oglala Lakota County55.5-0 pts
41Hyde County55.3-0.3 pts
42McCook County55.1-0.3 pts
43Hand County54.9-0.3 pts
44Haakon County54.9-0.4 pts
45Fall River County54.7-1 pts
46Faulk County54.4-0.1 pts
46Miner County54.4-0.3 pts
48Bennett County53.8-1 pts
49Roberts County53.8-0.3 pts
50Day County53.7-0.6 pts
51Jackson County53.7+0.3 pts
52Ziebach County53.6+0.2 pts
53Walworth County53.3-0.8 pts
54Charles Mix County530 pts
55Mellette County53-1.5 pts
56Todd County52.8-0.3 pts
57Douglas County52.8-0.8 pts
58Aurora County52.7-0.4 pts
59Gregory County52.5-0.9 pts
60Hanson County52.4-0.9 pts
61Hutchinson County52.3+0.2 pts
62Potter County51.5-1.5 pts
63Buffalo County51.4-0.9 pts
64Hamlin County51.3-0.7 pts
65Jerauld County51.2-1 pts
66McPherson County50.7+0.1 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, 2014) [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, 2014. 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=2014. 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, 2014. 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=2014.

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, 2014 [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=2014 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2014,
  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, 2014}},
  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=2014. 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, 2014
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=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2014.
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 71% in 2014, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

McPherson County, with 50.7% in 2014.

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