Barnwell County's estimated 2025 population is 20,399 with a growth rate of -0.12% in the past year according to the most recent United States census data. Barnwell County is the 38th largest county in South Carolina. The 2010 population was 22,639 and has seen a growth of -9.89% since that time.
Data after 2023 is projected based on recent change
The racial composition of Barnwell County includes 52.19% White, 43.26% Black or African American, and smaller percentages for Two or more races, other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Black or African American
Two or more races
Other race
Asian
Native American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 10,732 | 52.19% |
| Black or African American | 8,897 | 43.26% |
| Two or more races | 572 | 2.78% |
| Other race | 228 | 1.11% |
| Asian | 106 | 0.52% |
| Native American | 30 | 0.15% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Barnwell County's average per capita income is $39,647. Household income levels show a median of $41,800. The poverty rate stands at 28.53%.
Name | Median | Mean |
|---|---|---|
| Married Families | $88,504 | - |
| Families | $56,726 | $74,610 |
| Households | $41,800 | $62,036 |
| Non Families | $23,446 | $38,260 |
Average Income
Median Household Income
Poverty Rate