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

Counties in South Carolina by population under 18

Dillon County had the highest population under 18 of 46 counties in 2022, at 24.9%. McCormick County had the lowest, at 10.4%. The median was 21.4% and the figure for South Carolina was 21.4%. Source: the U.S. Census Bureau.

Highest24.9Dillon County
Lowest10.4McCormick County
Median21.446 counties
South Carolina21.4History

All counties, 2022

Dillon County: 24.9 %Dillon County24.9Dorchester County: 24.6 %Dorchester County24.6York County: 24 %York County24Berkeley County: 24 %Berkeley County24Barnwell County: 23.3 %Barnwell County23.3Florence County: 23.2 %Florence County23.2Spartanburg County: 23.2 %Spartanburg County23.2Kershaw County: 23.2 %Kershaw County23.2Sumter County: 23.1 %Sumter County23.1Lexington County: 23.1 %Lexington County23.1Greenville County: 22.8 %Greenville County22.8Cherokee County: 22.6 %Cherokee County22.6Darlington County: 22.5 %Darlington County22.5Chesterfield County: 22.5 %Chesterfield County22.5Anderson County: 22.4 %Anderson County22.4Saluda County: 22.3 %Saluda County22.3Lancaster County: 22.1 %Lancaster County22.1Chester County: 22 %Chester County22Greenwood County: 22 %Greenwood County22Colleton County: 21.7 %Colleton County21.7Marion County: 21.7 %Marion County21.7Laurens County: 21.6 %Laurens County21.6Aiken County: 21.4 %Aiken County21.4Newberry County: 21.4 %Newberry County21.4Union County: 21.1 %Union County21.1Orangeburg County: 21.1 %Orangeburg County21.1Richland County: 20.8 %Richland County20.8Hampton County: 20.7 %Hampton County20.7Abbeville County: 19.9 %Abbeville County19.9Marlboro County: 19.5 %Marlboro County19.5Charleston County: 19.5 %Charleston County19.5Bamberg County: 19.4 %Bamberg County19.4Clarendon County: 19.1 %Clarendon County19.1Williamsburg County: 19 %Williamsburg County19Calhoun County: 18.8 %Calhoun County18.8Oconee County: 18.7 %Oconee County18.7Jasper County: 18.6 %Jasper County18.6Pickens County: 18.2 %Pickens County18.2Lee County: 17.8 %Lee County17.8Edgefield County: 17.7 %Edgefield County17.7Beaufort County: 17.5 %Beaufort County17.5Fairfield County: 17.2 %Fairfield County17.2Horry County: 17.1 %Horry County17.1Georgetown County: 16.8 %Georgetown County16.8Allendale County: 16.3 %Allendale County16.3McCormick County: 10.4 %McCormick County10.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1Dillon County24.90 pts
2Dorchester County24.6-0.1 pts
3York County24-0.2 pts
4Berkeley County24-0.2 pts
5Barnwell County23.3-0.1 pts
6Florence County23.20 pts
7Spartanburg County23.20 pts
8Kershaw County23.2+0.1 pts
9Sumter County23.1-0.2 pts
10Lexington County23.1-0.1 pts
11Greenville County22.80 pts
12Cherokee County22.6+0.1 pts
13Darlington County22.50 pts
14Chesterfield County22.5+0.1 pts
15Anderson County22.4-0 pts
16Saluda County22.3+0.2 pts
17Lancaster County22.10 pts
18Chester County22-0.2 pts
19Greenwood County22-0.2 pts
20Colleton County21.7+0.2 pts
21Marion County21.7-0.2 pts
22Laurens County21.6-0.2 pts
23Aiken County21.40 pts
24Newberry County21.4-0 pts
25Union County21.1-0.2 pts
26Orangeburg County21.1-0.2 pts
27Richland County20.8-0.4 pts
28Hampton County20.70 pts
29Abbeville County19.9-0.2 pts
30Marlboro County19.50 pts
31Charleston County19.5-0.2 pts
32Bamberg County19.4+0.1 pts
33Clarendon County19.1-0.2 pts
34Williamsburg County19-0.3 pts
35Calhoun County18.8-0.2 pts
36Oconee County18.7-0.2 pts
37Jasper County18.6-0.6 pts
38Pickens County18.2-0.2 pts
39Lee County17.8+0.3 pts
40Edgefield County17.7-0.6 pts
41Beaufort County17.5-0.7 pts
42Fairfield County17.2-0.4 pts
43Horry County17.1-0.2 pts
44Georgetown County16.8-0.4 pts
45Allendale County16.3-0.6 pts
46McCormick County10.4-0.3 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, 2022) [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, 2022. 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=2022. 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, 2022. 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=2022.

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, 2022 [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=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_carolina_2022,
  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, 2022}},
  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=2022. 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, 2022
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=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-under-18/south-carolina-counties?period=2022.
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?

Dillon County, with 24.9% in 2022, according to the U.S. Census Bureau.

Which county has the lowest population under 18?

McCormick County, with 10.4% in 2022.

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