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

Counties in South Carolina by population under 18

Dorchester County had the highest population under 18 of 46 counties in 2017, at 25.5%. McCormick County had the lowest, at 12.4%. The median was 21.8% and the figure for South Carolina was 22.1%. Source: the U.S. Census Bureau.

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Highest25.5Dorchester County
Lowest12.4McCormick County
Median21.846 counties
South Carolina22.1History

Map of counties, 2017

Abbeville County: 21.2 %Aiken County: 21.9 %Allendale County: 17.6 %Anderson County: 23 %Bamberg County: 20.5 %Barnwell County: 23.3 %Beaufort County: 19.7 %Berkeley County: 24.5 %Calhoun County: 19.5 %Charleston County: 20.1 %Cherokee County: 23.3 %Chester County: 22.3 %Chesterfield County: 22.6 %Clarendon County: 20.1 %Colleton County: 21.4 %Darlington County: 22.4 %Dillon County: 24.3 %Dorchester County: 25.5 %Edgefield County: 19.5 %Fairfield County: 18.8 %Florence County: 23.5 %Georgetown County: 19 %Greenville County: 23.2 %Greenwood County: 22.3 %Hampton County: 20.7 %Horry County: 18.5 %Jasper County: 21.1 %Kershaw County: 23.3 %Lancaster County: 22.5 %Laurens County: 22 %Lee County: 19.5 %Lexington County: 23.7 %McCormick County: 12.4 %Marion County: 22.7 %Marlboro County: 19.6 %Newberry County: 22 %Oconee County: 19.8 %Orangeburg County: 21.7 %Pickens County: 19.1 %Richland County: 21.5 %Saluda County: 22.2 %Spartanburg County: 23.3 %Sumter County: 23.5 %Union County: 21.5 %Williamsburg County: 21 %York County: 24.9 %
  • Under 20
  • 20 to 21
  • 21 to 22
  • 22 to 23
  • 23 and over
%, 2017. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2017

Dorchester County: 25.5 %Dorchester County25.5York County: 24.9 %York County24.9Berkeley County: 24.5 %Berkeley County24.5Dillon County: 24.3 %Dillon County24.3Lexington County: 23.7 %Lexington County23.7Sumter County: 23.5 %Sumter County23.5Florence County: 23.5 %Florence County23.5Spartanburg County: 23.3 %Spartanburg County23.3Cherokee County: 23.3 %Cherokee County23.3Barnwell County: 23.3 %Barnwell County23.3Kershaw County: 23.3 %Kershaw County23.3Greenville County: 23.2 %Greenville County23.2Anderson County: 23 %Anderson County23Marion County: 22.7 %Marion County22.7Chesterfield County: 22.6 %Chesterfield County22.6Lancaster County: 22.5 %Lancaster County22.5Darlington County: 22.4 %Darlington County22.4Greenwood County: 22.3 %Greenwood County22.3Chester County: 22.3 %Chester County22.3Saluda County: 22.2 %Saluda County22.2Newberry County: 22 %Newberry County22Laurens County: 22 %Laurens County22Aiken County: 21.9 %Aiken County21.9Orangeburg County: 21.7 %Orangeburg County21.7Richland County: 21.5 %Richland County21.5Union County: 21.5 %Union County21.5Colleton County: 21.4 %Colleton County21.4Abbeville County: 21.2 %Abbeville County21.2Jasper County: 21.1 %Jasper County21.1Williamsburg County: 21 %Williamsburg County21Hampton County: 20.7 %Hampton County20.7Bamberg County: 20.5 %Bamberg County20.5Clarendon County: 20.1 %Clarendon County20.1Charleston County: 20.1 %Charleston County20.1Oconee County: 19.8 %Oconee County19.8Beaufort County: 19.7 %Beaufort County19.7Marlboro County: 19.6 %Marlboro County19.6Edgefield County: 19.5 %Edgefield County19.5Calhoun County: 19.5 %Calhoun County19.5Lee County: 19.5 %Lee County19.5Pickens County: 19.1 %Pickens County19.1Georgetown County: 19 %Georgetown County19Fairfield County: 18.8 %Fairfield County18.8Horry County: 18.5 %Horry County18.5Allendale County: 17.6 %Allendale County17.6McCormick County: 12.4 %McCormick County12.4Dorchester County: 25.5 %Dorchester County25.5York County: 24.9 %York County24.9Berkeley County: 24.5 %Berkeley County24.5Dillon County: 24.3 %Dillon County24.3Lexington County: 23.7 %Lexington County23.7Sumter County: 23.5 %Sumter County23.5Florence County: 23.5 %Florence County23.5Spartanburg County: 23.3 %Spartanburg County23.3Cherokee County: 23.3 %Cherokee County23.3Barnwell County: 23.3 %Barnwell County23.3Kershaw County: 23.3 %Kershaw County23.3Greenville County: 23.2 %Greenville County23.2Anderson County: 23 %Anderson County23Marion County: 22.7 %Marion County22.7Chesterfield County: 22.6 %Chesterfield County22.6Lancaster County: 22.5 %Lancaster County22.5Darlington County: 22.4 %Darlington County22.4Greenwood County: 22.3 %Greenwood County22.3Chester County: 22.3 %Chester County22.3Saluda County: 22.2 %Saluda County22.2Newberry County: 22 %Newberry County22Laurens County: 22 %Laurens County22Aiken County: 21.9 %Aiken County21.9Orangeburg County: 21.7 %Orangeburg County21.7Richland County: 21.5 %Richland County21.5Union County: 21.5 %Union County21.5Colleton County: 21.4 %Colleton County21.4Abbeville County: 21.2 %Abbeville County21.2Jasper County: 21.1 %Jasper County21.1Williamsburg County: 21 %Williamsburg County21Hampton County: 20.7 %Hampton County20.7Bamberg County: 20.5 %Bamberg County20.5Clarendon County: 20.1 %Clarendon County20.1Charleston County: 20.1 %Charleston County20.1Oconee County: 19.8 %Oconee County19.8Beaufort County: 19.7 %Beaufort County19.7Marlboro County: 19.6 %Marlboro County19.6Edgefield County: 19.5 %Edgefield County19.5Calhoun County: 19.5 %Calhoun County19.5Lee County: 19.5 %Lee County19.5Pickens County: 19.1 %Pickens County19.1Georgetown County: 19 %Georgetown County19Fairfield County: 18.8 %Fairfield County18.8Horry County: 18.5 %Horry County18.5Allendale County: 17.6 %Allendale County17.6McCormick County: 12.4 %McCormick County12.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Dorchester County25.5-0.2 pts
2York County24.9-0.1 pts
3Berkeley County24.5-0.1 pts
4Dillon County24.3-0.3 pts
5Lexington County23.7-0.1 pts
6Sumter County23.5-0.3 pts
7Florence County23.5-0.2 pts
8Spartanburg County23.3-0.1 pts
9Cherokee County23.3-0 pts
10Barnwell County23.3-0.5 pts
11Kershaw County23.3+0.1 pts
12Greenville County23.2-0.1 pts
13Anderson County23-0.1 pts
14Marion County22.7-0.3 pts
15Chesterfield County22.6-0.2 pts
16Lancaster County22.5-0.1 pts
17Darlington County22.4-0.3 pts
18Greenwood County22.3-0.2 pts
19Chester County22.3-0 pts
20Saluda County22.2-0.2 pts
21Newberry County22-0.1 pts
22Laurens County22-0.1 pts
23Aiken County21.9-0.1 pts
24Orangeburg County21.7-0.2 pts
25Richland County21.5-0.1 pts
26Union County21.5-0.1 pts
27Colleton County21.4-0.3 pts
28Abbeville County21.2-0.2 pts
29Jasper County21.1-0.5 pts
30Williamsburg County21-0.2 pts
31Hampton County20.7-0.5 pts
32Bamberg County20.5-0.5 pts
33Clarendon County20.1-0.5 pts
34Charleston County20.1-0.1 pts
35Oconee County19.8-0.1 pts
36Beaufort County19.7-0.2 pts
37Marlboro County19.6-0.1 pts
38Edgefield County19.50 pts
39Calhoun County19.5-0.4 pts
40Lee County19.5-0.4 pts
41Pickens County19.1-0.2 pts
42Georgetown County19-0.3 pts
43Fairfield County18.8-0.5 pts
44Horry County18.5-0.4 pts
45Allendale County17.6+0.1 pts
46McCormick County12.4-0.4 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 Carolina by population under 18, 2017) [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 Carolina by population under 18, 2017. 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-carolina-counties?period=2017. 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 Carolina by population under 18, 2017. 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-carolina-counties?period=2017.

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 Carolina by population under 18, 2017 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-under-18/south-carolina-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_carolina_2017,
  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 Carolina by population under 18, 2017}},
  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-carolina-counties?period=2017. 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 Carolina by population under 18, 2017
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-carolina-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/south-carolina-counties?period=2017.
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?

Dorchester County, with 25.5% in 2017, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

McCormick County, with 12.4% in 2017.

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 Carolina: more rankings