Market insights · South Carolina
Sumter County, SC: growth, migration and housing
Sumter County has 105,067 residents, down 0.3% since 2020 (+0.3% in the last year). In 2022–2023, 2,940 households moved in and 2,813 moved out (+127 net), bringing in a net $1.9M of income. Median household income is $56,693, the median home $165,300 and median rent $1,057 a month.
In South Carolina: 35th of 46 counties for 5-year population growth · 31st of 46 counties for net in-migration (per resident) · 24th of 46 counties for median household income · 27th of 46 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Sumter County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Richland County, SC | 236 | $10.1M |
| Clarendon County, SC | 195 | $7.4M |
| Lexington County, SC | 87 | $4.1M |
| Florence County, SC | 86 | $3.3M |
| Lee County, SC | 86 | $2.7M |
| Kershaw County, SC | 70 | $3.5M |
| Charleston County, SC | 43 | $2.7M |
| Horry County, SC | 33 | $1.6M |
Where leavers went
Top counties by households leaving Sumter County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Richland County, SC | 315 | $14.6M |
| Clarendon County, SC | 156 | $6.2M |
| Lexington County, SC | 94 | $3.6M |
| Florence County, SC | 75 | $3.8M |
| Kershaw County, SC | 73 | $4.0M |
| Lee County, SC | 72 | $3.0M |
| Mecklenburg County, NC | 59 | $2.5M |
| Horry County, SC | 53 | $2.9M |
BizyFi in Sumter County
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Sources: U.S. Census Bureau population estimates (vintage 2025), American Community Survey 5-year (2024), and IRS Statistics of Income county-to-county migration data (2022–2023). Migration counts are tax returns (roughly households) moving between U.S. counties; the IRS suppresses very small flows. Growth rates, per-1,000 figures, rent share and state ranks are BizyFi calculations. Data updated 2026-10-17. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.