| | South Boston, VA | Carthage, NC | United States |
| Population | 8,011 | 2,672 | 329,725,481 |
| Female Population | 57.8% | 52.7% | 50.5% |
| Male Population | 42.2% | 47.3% | 49.5% |
| Median Age | 43 | 40.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,145 | 2,304 | 309,327,143 |
| Population - 2000 | 8,491 | 1,871 | 285,036,114 |
| Population - 1990 | 6,997 | 976 | 251,960,433 |
| Pop. 2000 to Now | -11.5% | 38.7% | 15.6% |
| Pop. 1990 to Now | 7.5% | 165.9% | 30.8% |
| space4 | | | |
| Population Density | 613.3 | 404.6 | 93.4 |
| Land Area | 13.1 | 6.6 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | South Boston, VA | Carthage, NC | United States |
| Age 0 to 4 | 8.3% | 6.9% | 5.9% |
| Age 5 to 9 | 6.5% | 5.7% | 6.1% |
| Age 10 to 14 | 5.3% | 6.3% | 6.6% |
| Age 15 to 17 | 5.0% | 3.9% | 3.9% |
| Age 18 to 20 | 3.6% | 1.2% | 4.0% |
| Age 21 to 24 | 2.5% | 3.5% | 5.2% |
| Age 25 to 34 | 11.5% | 14.4% | 13.8% |
| Age 35 to 44 | 11.0% | 13.3% | 12.9% |
| Age 45 to 54 | 11.2% | 13.0% | 12.6% |
| Age 55 to 59 | 6.1% | 4.9% | 6.7% |
| Age 60 to 64 | 5.9% | 6.0% | 6.3% |
| Age 65 to 74 | 11.5% | 10.7% | 9.6% |
| Age 75 to 84 | 6.7% | 7.2% | 4.5% |
| Age 85 and over | 4.8% | 3.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | South Boston, VA | Carthage, NC | United States |
| White | 41.4% | 76.6% | 59.4% |
| Black | 55.2% | 14.0% | 12.2% |
| Asian | 0.6% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.6% | 5.7% | 3.2% |
| Hispanic | 2.2% | 3.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | South Boston, VA | Carthage, NC | United States |
| Married Population | 31.0% | 50.8% | 49.8% |
| Currently Married | 27.3% | 48.9% | 48.0% |
| Married but Separated | 3.7% | 1.9% | 1.8% |
| Single Population | 69.0% | 49.2% | 50.2% |
| Never Married | 43.3% | 23.4% | 33.8% |
| Divorced | 12.7% | 13.5% | 10.8% |
| Widowed | 13.0% | 12.3% | 5.6% |
| space5 | | | |
| Household Size | 2.49 | 2.38 | 2.60 |
| Households | 2,999 | 1,074 | 124,010,992 |
| Family Households | 1,750 | 654 | 80,755,759 |
| Married couple, w/children | 14.8% | 33.8% | 30.5% |
| Married couple, no children | 29.6% | 41.1% | 42.9% |
| Non Family Households | 1,249 | 420 | 43,255,233 |
| Single householder, w/children | 37.8% | 15.1% | 15.8% |
| Single householder, no children | 17.8% | 9.9% | 10.8% |