Data / Rankings / Population under 18 / Counties in South Dakota

Counties in South Dakota by population under 18

Todd County had the highest population under 18 of 66 counties in 2014, at 40.3%. Campbell County had the lowest, at 17.8%. The median was 23.5% and the figure for South Dakota was 24.7%. Source: the U.S. Census Bureau.

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Highest40.3Todd County
Lowest17.8Campbell County
Median23.566 counties
South Dakota24.7History

Map of counties, 2014

Aurora County: 26.1 %Beadle County: 25.8 %Bennett County: 33.5 %Bon Homme County: 18.7 %Brookings County: 19.9 %Brown County: 23.6 %Brule County: 24.6 %Buffalo County: 40.2 %Butte County: 24.4 %Campbell County: 17.8 %Charles Mix County: 29.1 %Clark County: 23.7 %Clay County: 17.8 %Codington County: 24.4 %Corson County: 33.9 %Custer County: 17.9 %Davison County: 22.7 %Day County: 22.4 %Deuel County: 23.2 %Dewey County: 32.5 %Douglas County: 21.3 %Edmunds County: 23.1 %Fall River County: 18.1 %Faulk County: 21.5 %Grant County: 22.4 %Gregory County: 22.9 %Haakon County: 22.4 %Hamlin County: 31.7 %Hand County: 21.1 %Hanson County: 32.4 %Harding County: 23 %Hughes County: 23.6 %Hutchinson County: 23.5 %Hyde County: 20.8 %Jackson County: 32.8 %Jerauld County: 23.1 %Jones County: 21.4 %Kingsbury County: 22.1 %Lake County: 21 %Lawrence County: 19.1 %Lincoln County: 29.5 %Lyman County: 29.4 %McCook County: 25.8 %McPherson County: 20.5 %Marshall County: 21.5 %Meade County: 25.4 %Mellette County: 31.4 %Miner County: 23.6 %Minnehaha County: 25.1 %Moody County: 25.1 %Oglala Lakota County: 38.1 %Pennington County: 23.9 %Perkins County: 21.9 %Potter County: 20 %Roberts County: 28 %Sanborn County: 22.3 %Spink County: 24.1 %Stanley County: 23.7 %Sully County: 22.6 %Todd County: 40.3 %Tripp County: 22.3 %Turner County: 23.7 %Union County: 25.2 %Walworth County: 23.1 %Yankton County: 21.2 %Ziebach County: 38.5 %
  • Under 21
  • 21 to 22
  • 22 to 24
  • 24 to 25
  • 25 to 30
  • 30 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

Todd County: 40.3 %Todd County40.3Buffalo County: 40.2 %Buffalo County40.2Ziebach County: 38.5 %Ziebach County38.5Oglala Lakota County: 38.1 %Oglala Lakota County38.1Corson County: 33.9 %Corson County33.9Bennett County: 33.5 %Bennett County33.5Jackson County: 32.8 %Jackson County32.8Dewey County: 32.5 %Dewey County32.5Hanson County: 32.4 %Hanson County32.4Hamlin County: 31.7 %Hamlin County31.7Mellette County: 31.4 %Mellette County31.4Lincoln County: 29.5 %Lincoln County29.5Lyman County: 29.4 %Lyman County29.4Charles Mix County: 29.1 %Charles Mix County29.1Roberts County: 28 %Roberts County28Aurora County: 26.1 %Aurora County26.1McCook County: 25.8 %McCook County25.8Beadle County: 25.8 %Beadle County25.8Meade County: 25.4 %Meade County25.4Union County: 25.2 %Union County25.2Moody County: 25.1 %Moody County25.1Minnehaha County: 25.1 %Minnehaha County25.1Brule County: 24.6 %Brule County24.6Codington County: 24.4 %Codington County24.4Butte County: 24.4 %Butte County24.4Spink County: 24.1 %Spink County24.1Pennington County: 23.9 %Pennington County23.9Clark County: 23.7 %Clark County23.7Stanley County: 23.7 %Stanley County23.7Turner County: 23.7 %Turner County23.7Hughes County: 23.6 %Hughes County23.6Miner County: 23.6 %Miner County23.6Brown County: 23.6 %Brown County23.6Hutchinson County: 23.5 %Hutchinson County23.5Deuel County: 23.2 %Deuel County23.2Edmunds County: 23.1 %Edmunds County23.1Walworth County: 23.1 %Walworth County23.1Jerauld County: 23.1 %Jerauld County23.1Harding County: 23 %Harding County23Gregory County: 22.9 %Gregory County22.9Todd County: 40.3 %Todd County40.3Buffalo County: 40.2 %Buffalo County40.2Ziebach County: 38.5 %Ziebach County38.5Oglala Lakota County: 38.1 %Oglala Lakota County38.1Corson County: 33.9 %Corson County33.9Bennett County: 33.5 %Bennett County33.5Jackson County: 32.8 %Jackson County32.8Dewey County: 32.5 %Dewey County32.5Hanson County: 32.4 %Hanson County32.4Hamlin County: 31.7 %Hamlin County31.7Mellette County: 31.4 %Mellette County31.4Lincoln County: 29.5 %Lincoln County29.5Lyman County: 29.4 %Lyman County29.4Charles Mix County: 29.1 %Charles Mix County29.1Roberts County: 28 %Roberts County28Aurora County: 26.1 %Aurora County26.1McCook County: 25.8 %McCook County25.8Beadle County: 25.8 %Beadle County25.8Meade County: 25.4 %Meade County25.4Union County: 25.2 %Union County25.2Moody County: 25.1 %Moody County25.1Minnehaha County: 25.1 %Minnehaha County25.1Brule County: 24.6 %Brule County24.6Codington County: 24.4 %Codington County24.4Butte County: 24.4 %Butte County24.4Spink County: 24.1 %Spink County24.1Pennington County: 23.9 %Pennington County23.9Clark County: 23.7 %Clark County23.7Stanley County: 23.7 %Stanley County23.7Turner County: 23.7 %Turner County23.7Hughes County: 23.6 %Hughes County23.6Miner County: 23.6 %Miner County23.6Brown County: 23.6 %Brown County23.6Hutchinson County: 23.5 %Hutchinson County23.5Deuel County: 23.2 %Deuel County23.2Edmunds County: 23.1 %Edmunds County23.1Walworth County: 23.1 %Walworth County23.1Jerauld County: 23.1 %Jerauld County23.1Harding County: 23 %Harding County23Gregory County: 22.9 %Gregory County22.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2014 (%)Change on 2013
1Todd County40.3+0.1 pts
2Buffalo County40.2+0.4 pts
3Ziebach County38.5-0.1 pts
4Oglala Lakota County38.1-0.1 pts
5Corson County33.9+0.2 pts
6Bennett County33.5+0.6 pts
7Jackson County32.80 pts
8Dewey County32.5+0.1 pts
9Hanson County32.4+0.4 pts
10Hamlin County31.7+0.6 pts
11Mellette County31.40 pts
12Lincoln County29.5-0.1 pts
13Lyman County29.4+0.5 pts
14Charles Mix County29.1+0.1 pts
15Roberts County28+0.3 pts
16Aurora County26.1+0.1 pts
17McCook County25.8+0.1 pts
18Beadle County25.8+0.3 pts
19Meade County25.4-0.1 pts
20Union County25.2+0.1 pts
21Moody County25.1+0.1 pts
22Minnehaha County25.1+0.1 pts
23Brule County24.6-0.7 pts
24Codington County24.40 pts
25Butte County24.4-0 pts
26Spink County24.1-0.1 pts
27Pennington County23.9-0.1 pts
28Clark County23.7+0.6 pts
29Stanley County23.7+0.3 pts
30Turner County23.7-0.2 pts
31Hughes County23.6+0.2 pts
32Miner County23.6-0.4 pts
33Brown County23.6+0.1 pts
34Hutchinson County23.5+0.1 pts
35Deuel County23.2+0.5 pts
36Edmunds County23.1-0.5 pts
37Walworth County23.1+0.4 pts
38Jerauld County23.1+0.2 pts
39Harding County23+0.3 pts
40Gregory County22.9+0.5 pts
41Davison County22.7-0.1 pts
42Sully County22.6-0.1 pts
43Haakon County22.4-0.1 pts
44Day County22.4-0.3 pts
45Grant County22.4+0.1 pts
46Sanborn County22.3+1 pts
47Tripp County22.30 pts
48Kingsbury County22.10 pts
49Perkins County21.90 pts
50Marshall County21.5-0.8 pts
51Faulk County21.5-0.2 pts
52Jones County21.4-0 pts
53Douglas County21.3-0.5 pts
54Yankton County21.2-0.3 pts
55Hand County21.1+0.4 pts
56Lake County210 pts
57Hyde County20.8+0.1 pts
58McPherson County20.5-0.3 pts
59Potter County20-0.4 pts
60Brookings County19.9+0.4 pts
61Lawrence County19.1-0.1 pts
62Bon Homme County18.7-0.4 pts
63Fall River County18.1+0.4 pts
64Custer County17.9-0.4 pts
65Clay County17.8+0.1 pts
66Campbell County17.8+0.5 pts

Other periods

About this ranking

Residents aged 0 to 17 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.

Uses the US age of majority. Not comparable with population_0_14_share, which stops at 14.

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 0 to 17 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 0 to 17 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 under 18, 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 0 to 17 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 under 18, 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-under-18/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 0 to 17 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 under 18, 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-under-18/south-dakota-counties?period=2014.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18, 2014 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/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 0 to 17 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 under 18, 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-under-18/south-dakota-counties?period=2014. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 0 to 17 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 under 18, 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-under-18/south-dakota-counties?period=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/south-dakota-counties?period=2014.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 0 to 17 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 under 18?

Todd County, with 40.3% in 2014, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

Campbell County, with 17.8% 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 0 to 17 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 under 18: other rankings

Counties in South Dakota: more rankings