Marlboro County's estimated 2026 population is 24,950 with a growth rate of -1.09% 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 -13.72% since that time.
Data after 2023 is projected based on recent change
The racial composition of Marlboro County includes 49.29% Black or African American, 38.73% White, 3.46% Native American, and smaller percentages for other race, Asian and multiracial populations.
Black or African American (49.29%)
White (38.73%)
Two or more races (6.18%)
Native American (3.46%)
Other race (1.96%)
Asian (0.38%)
Race | Population | Percentage (of total) |
|---|---|---|
| Black or African American | 12,956 | 49.29% |
| White | 10,180 | 38.73% |
| Two or more races | 1,625 | 6.18% |
| Native American | 909 | 3.46% |
| Other race | 516 | 1.96% |
| Asian | 99 | 0.38% |
Married
Widowed
Divorced
Separated
Never Married
Marlboro County's average per capita income is $35,655. Household income levels show a median of $36,293. The poverty rate stands at 26.16%.
Name | Median | Mean |
|---|---|---|
| Married Families | $57,037 | - |
| Families | $50,795 | $65,653 |
| Households | $36,293 | $50,984 |
| Non Families | $20,659 | $32,571 |
Average Income
Median Household Income
Poverty Rate