Colleton County's 2026 population is estimated at 39,697, reflecting a 0.55% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Colleton County is the 27th largest county in South Carolina. The 2010 population was 38,886 and has grown 2.09% since 2010.
Data after 2023 is projected based on recent change
Overall: 42 years
Female: 42.9 years
Male: 40.2 years
There are 29,991 adults, (7,929 of whom are seniors) in Colleton County.
Female: 20,325 (52.4%)
Male: 18,458 (47.6%)
The racial composition of Colleton County includes 57.31% White, 33.76% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 22,225 | 57.31% |
| Black or African American | 13,094 | 33.76% |
| Two or more races | 2,336 | 6.02% |
| Other race | 809 | 2.09% |
| Asian | 172 | 0.44% |
| Native American | 126 | 0.32% |
| Native Hawaiian or Pacific Islander | 21 | 0.05% |
Colleton County 's average per capita income is $41,727. Household income levels show a median of $51,114. The poverty rate stands at 19.58%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $83,968 | - |
| Families | $64,184 | $82,261 |
| Households | $51,114 | $70,687 |
| Non Families | $32,025 | $44,935 |
Average Income
Median Household Income
Poverty Rate