# Counties in South Carolina by population under 18, 2025

All 46 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_0_17_share`
- Unit: %
- Definition: 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.
- Source: 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: 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.
- Web page: https://invokely.ai/rankings/population-under-18/south-carolina-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Dillon County | 24.4 |
| 2 | Dorchester County | 23.5 |
| 3 | Barnwell County | 23.2 |
| 4 | York County | 23.1 |
| 5 | Berkeley County | 22.9 |
| 6 | Spartanburg County | 22.9 |
| 7 | Kershaw County | 22.8 |
| 8 | Florence County | 22.6 |
| 9 | Sumter County | 22.5 |
| 10 | Chesterfield County | 22.4 |
| 11 | Lexington County | 22.3 |
| 12 | Darlington County | 22.2 |
| 13 | Lancaster County | 22.1 |
| 14 | Cherokee County | 22.1 |
| 15 | Greenville County | 22 |
| 16 | Saluda County | 21.8 |
| 17 | Anderson County | 21.7 |
| 18 | Colleton County | 21.5 |
| 19 | Aiken County | 21.3 |
| 20 | Chester County | 21.1 |
| 21 | Marion County | 21.1 |
| 22 | Laurens County | 21.1 |
| 23 | Greenwood County | 21 |
| 24 | Hampton County | 20.8 |
| 25 | Newberry County | 20.7 |
| 26 | Orangeburg County | 20.3 |
| 27 | Union County | 20 |
| 28 | Richland County | 19.6 |
| 29 | Abbeville County | 19.4 |
| 30 | Marlboro County | 19.2 |
| 31 | Charleston County | 18.7 |
| 32 | Bamberg County | 18.6 |
| 33 | Calhoun County | 18.3 |
| 34 | Clarendon County | 18 |
| 35 | Pickens County | 18 |
| 36 | Oconee County | 18 |
| 37 | Williamsburg County | 18 |
| 38 | Lee County | 17.9 |
| 39 | Edgefield County | 17.3 |
| 40 | Jasper County | 17.2 |
| 41 | Fairfield County | 16.9 |
| 42 | Horry County | 16.1 |
| 43 | Allendale County | 16 |
| 44 | Beaufort County | 15.9 |
| 45 | Georgetown County | 15.8 |
| 46 | McCormick County | 10 |