Marion County's estimated 2025 population is 28,582 with a growth rate of 0.13% in the past year according to the most recent United States census data. Marion County is the 33rd largest county in South Carolina. The 2010 population was 32,951 and has seen a growth of -13.26% since that time.
Data after 2023 is projected based on recent change
The racial composition of Marion County includes 55.79% Black or African American, 38.47% White, and smaller percentages for Two or more races, other race, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
Black or African American (55.8%)
White (38.5%)
Two or more races (2.9%)
Other race (2.3%)
Native American (0.3%)
Asian (0.2%)
Native Hawaiian or Pacific Islander (0.1%)
Race | Population | Percentage (of total) |
|---|---|---|
| Black or African American | 16,123 | 55.79% |
| White | 11,117 | 38.47% |
| Two or more races | 826 | 2.86% |
| Other race | 661 | 2.29% |
| Native American | 98 | 0.34% |
| Asian | 45 | 0.16% |
| Native Hawaiian or Pacific Islander | 30 | 0.1% |
Married
Widowed
Divorced
Separated
Never Married
Marion County's average per capita income is $33,440. Household income levels show a median of $34,501. The poverty rate stands at 27.32%.
Name | Median | Mean |
|---|---|---|
| Married Families | $67,607 | - |
| Families | $47,288 | $62,929 |
| Households | $34,501 | $51,626 |
| Non Families | $21,567 | $34,732 |
Average Income
Median Household Income
Poverty Rate