Marlboro County's estimated 2026 population is 25,432 with a growth rate of -0.22% in the past year according to the most recent United States census data. Marlboro County is the 36th largest county in South Carolina. The 2010 population was 28,918 and has seen a growth of -12.05% since that time.
Data after 2023 is projected based on recent change
Overall: 41.7 years
Female: 44.8 years
Male: 40.1 years
There are 20,804 adults, (4,959 of whom are seniors) in Marlboro County.
Female: 12,290 (47.3%)
Male: 13,685 (52.7%)
The racial composition of Marlboro County includes 47.85% Black or African American, 39.19% White, 3.03% Native American, and smaller percentages for other race, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| Black or African American | 12,429 | 47.85% |
| White | 10,179 | 39.19% |
| Two or more races | 2,064 | 7.95% |
| Native American | 786 | 3.03% |
| Other race | 410 | 1.58% |
| Asian | 107 | 0.41% |
Marlboro County's average per capita income is $32,058. Household income levels show a median of $34,301. The poverty rate stands at 28.51%.
Name | Median | Mean |
|---|---|---|
| Married Families | $69,475 | - |
| Families | $54,353 | $68,613 |
| Households | $34,301 | $51,818 |
| Non Families | $20,106 | $30,962 |
Average Income
Median Household Income
Poverty Rate