| City : | Barnwell City |
| County : | Barnwell County, Beaver County, Jasper County |
| State : | South Carolina (SC) |
| | |
| Land Area : | 7.85 sq mi |
| Water Area : | 0.15 sq mi |
| Latitude : | 33.2416332 |
| Longitude : | -81.3661435 |
| | |
| Population (2010): | 4,750 |
| Population Estimate (2012) : | 4,737 |
| Population Density : | 605.12/sq mi |
| Housing Units (2012) : | 2,240 |
| Median Household Income (2012) : | $34,842 (South Carolina : $44,623, USA : $53,046) |
| Median Family Income (2012) : | $41,786 (South Carolina : $55,058, USA : $64,585) |
| Median House Price (2012) : | $94,300 (South Carolina : $137,400, USA : $181,400) |