| | Jamestown, SC | Greeleyville, SC | United States |
| Population | 91 | 389 | 329,725,481 |
| Female Population | 27.5% | 53.7% | 50.5% |
| Male Population | 72.5% | 46.3% | 49.5% |
| Median Age | 55.3 | 54.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 75 | 434 | 309,327,143 |
| Population - 2000 | 97 | 452 | 285,036,114 |
| Population - 1990 | 84 | 464 | 251,960,433 |
| Pop. 2000 to Now | -14.4% | -16.6% | 15.6% |
| Pop. 1990 to Now | -1.2% | -18.8% | 30.8% |
| space4 | | | |
| Population Density | 150.2 | 318.1 | 93.4 |
| Land Area | 0.6 | 1.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Jamestown, SC | Greeleyville, SC | United States |
| Age 0 to 4 | 0.0% | 3.1% | 5.9% |
| Age 5 to 9 | 0.0% | 3.6% | 6.1% |
| Age 10 to 14 | 0.0% | 4.6% | 6.6% |
| Age 15 to 17 | 0.0% | 6.9% | 3.9% |
| Age 18 to 20 | 8.8% | 3.6% | 4.0% |
| Age 21 to 24 | 0.0% | 2.1% | 5.2% |
| Age 25 to 34 | 23.1% | 8.2% | 13.8% |
| Age 35 to 44 | 0.0% | 5.4% | 12.9% |
| Age 45 to 54 | 13.2% | 12.9% | 12.6% |
| Age 55 to 59 | 27.5% | 4.4% | 6.7% |
| Age 60 to 64 | 13.2% | 10.8% | 6.3% |
| Age 65 to 74 | 11.0% | 17.2% | 9.6% |
| Age 75 to 84 | 3.3% | 8.7% | 4.5% |
| Age 85 and over | 0.0% | 8.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Jamestown, SC | Greeleyville, SC | United States |
| White | 75.8% | 31.6% | 59.4% |
| Black | 15.4% | 65.0% | 12.2% |
| Asian | 0.0% | 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 | 8.8% | 2.1% | 3.2% |
| Hispanic | 0.0% | 1.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Jamestown, SC | Greeleyville, SC | United States |
| Married Population | 48.4% | 53.0% | 49.8% |
| Currently Married | 48.4% | 46.7% | 48.0% |
| Married but Separated | 0.0% | 6.4% | 1.8% |
| Single Population | 51.6% | 47.0% | 50.2% |
| Never Married | 40.7% | 28.1% | 33.8% |
| Divorced | 11.0% | 5.8% | 10.8% |
| Widowed | 0.0% | 13.0% | 5.6% |
| space5 | | | |
| Household Size | 1.54 | 2.11 | 2.60 |
| Households | 59 | 184 | 124,010,992 |
| Family Households | 29 | 111 | 80,755,759 |
| Married couple, w/children | 0.0% | 20.7% | 30.5% |
| Married couple, no children | 82.8% | 52.3% | 42.9% |
| Non Family Households | 30 | 73 | 43,255,233 |
| Single householder, w/children | 0.0% | 13.5% | 15.8% |
| Single householder, no children | 17.2% | 13.5% | 10.8% |