| Name | Barnwell County |
| State | South Carolina |
| FIPS Code | 45011 |
| County Seat | Barnwell |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 22,523 |
| Population Growth Rate(2000-2022) | -8.98% |
| Majority Ethnicity | White 53.62% |
| Public School Majority Ethnicity | African American 55% |
| Partisan Voting Index | Republican:+3 |
| Unemployment Rate (December 2024) | 7.0% |
| Area Code(s) | 803 / 839 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 53.62% |
| African American | 46% |
| Hispanic | 0.11% |
| Asian | 0.28% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 35.83% |
| African American | 55.43% |
| Hispanic | 3.66% |
| Asian | 1.07% |
| Native American | 0.09% |
| Hawaiin/Pacific Islander | 0.16% |