What are the fastest-growing counties in South Carolina?
Jasper County is the fastest-growing county in South Carolina: its population grew 5.73% a year from 2020 to 2025, to 38,533 residents (Census PEP Vintage 2025). Horry County (3.86%) and Berkeley County (3.48%) follow. South Carolina as a whole grew 1.65% a year to 5,570,274 residents.
Data as of 2026-09-23. Population, growth and migration: PEP Vintage 2025 · 2020–2025. Income migration: IRS SOI 2022–2023 (2-yr lag).
Top 10 counties in South Carolina by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Jasper County | 38,533 | 5.73%* | +7,815 | +1,412 | +$107.9M |
| 2 | Horry County | 427,551 | 3.86% | +75,073 | +7,022 | +$745.0M |
| 3 | Berkeley County | 274,666 | 3.48% | +32,344 | +5,628 | +$276.9M |
| 4 | Lancaster County | 114,296 | 3.42% | +15,669 | +1,833 | +$128.3M |
| 5 | Edgefield County | 29,808 | 3.03% | +4,113 | +481 | +$28.2M |
| 6 | Spartanburg County | 380,857 | 2.95% | +43,308 | +6,281 | +$220.6M |
| 7 | Kershaw County | 73,166 | 2.21% | +7,530 | +456 | +$44.4M |
| 8 | Greenville County | 583,125 | 2.04% | +34,197 | +15,764 | +$354.7M |
| 9 | Dorchester County | 178,397 | 1.94% | +11,843 | +2,160 | +$135.4M |
| 10 | Beaufort County | 204,433 | 1.71% | +13,411 | +4,156 | +$531.9M |
* Growth above 5% a year. The Census estimate is shown as published; the pipeline marks, and does not alter, rates this high.
Where are people moving in South Carolina?
Horry County gained the most people from elsewhere in the United States: net domestic migration of +75,073 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every South Carolina place with 10,000 or more residents by that figure; the IRS column shows net adjusted gross income migration for 2022 to 2023.
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Horry County | 427,551 | 3.86% | +75,073 | +7,022 | +$745.0M |
| 2 | Spartanburg County | 380,857 | 2.95% | +43,308 | +6,281 | +$220.6M |
| 3 | Greenville County | 583,125 | 2.04% | +34,197 | +15,764 | +$354.7M |
| 4 | Berkeley County | 274,666 | 3.48% | +32,344 | +5,628 | +$276.9M |
| 5 | Lexington County | 317,588 | 1.49% | +18,024 | +4,686 | +$89.3M |
| 6 | York County | 306,887 | 1.57% | +16,265 | +4,751 | +$184.8M |
| 7 | Anderson County | 219,930 | 1.50% | +16,246 | +1,729 | +$102.9M |
| 8 | Lancaster County | 114,296 | 3.42% | +15,669 | +1,833 | +$128.3M |
| 9 | Beaufort County | 204,433 | 1.71% | +13,411 | +4,156 | +$531.9M |
| 10 | Aiken County | 181,515 | 1.42% | +11,923 | +1,198 | +$81.1M |
Go past the headline numbers
The interactive Demographics map layer and the full report for a single place are part of paid plans.
Get the Demographics Report for Jasper CountyFrequently asked questions
- What are the fastest-growing counties in South Carolina?
- By population growth from 2020 to 2025, the fastest are Jasper County (5.73% a year), Horry County (3.86% a year), Berkeley County (3.48% a year), Lancaster County (3.42% a year) and Edgefield County (3.03% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in South Carolina?
- By net domestic migration from 2020 to 2025, the largest gains are Horry County (+75,073), Spartanburg County (+43,308) and Greenville County (+34,197) (Census PEP Vintage 2025).
- How fast is South Carolina growing overall?
- South Carolina grew 1.65% a year from 2020 to 2025, to 5,570,274 residents, with net migration of +451,021 people (Census PEP Vintage 2025).
- Where does this South Carolina data come from, and how current is it?
- Population, growth and migration come from the U.S. Census Bureau Population Estimates Program (PEP Vintage 2025 · 2020–2025). Income migration comes from IRS Statistics of Income (IRS SOI 2022–2023 (2-yr lag)). Counties with fewer than 10,000 residents are not ranked (1 of 46 in South Carolina). Data last loaded 2026-09-23.
Data as of 2026-09-23: sources and periods
- Population, growth and migration
- U.S. Census Bureau, Population Estimates Program: PEP Vintage 2025 · 2020–2025. census.gov/programs-surveys/popest
- Income migration (net AGI)
- Internal Revenue Service, Statistics of Income migration data: IRS SOI 2022–2023 (2-yr lag). irs.gov/statistics/soi-tax-stats-migration-data
How to read the table
- Population is the Census July 1 estimate of the latest vintage.
- Growth is the compound annual rate over 2020 to 2025.
- Net domestic and international migration are cumulative people over 2020 to 2025.
- IRS net AGI migration is adjusted gross income that moved in, less what moved out, for 2022 to 2023. A plus sign means a net inflow.
- Places with fewer than 10,000 residents are left out of the rankings.