| | Ridgeville, SC | Varnville, SC | United States |
| Population | 1,592 | 1,954 | 329,725,481 |
| Female Population | 19.9% | 49.0% | 50.5% |
| Male Population | 80.1% | 51.0% | 49.5% |
| Median Age | 45.7 | 39.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,970 | 2,156 | 309,327,143 |
| Population - 2000 | 1,690 | 2,074 | 285,036,114 |
| Population - 1990 | 1,625 | 1,970 | 251,960,433 |
| Pop. 2000 to Now | 8.9% | -6.0% | 15.6% |
| Pop. 1990 to Now | 13.3% | -1.1% | 30.8% |
| space4 | | | |
| Population Density | 886.4 | 509.9 | 93.4 |
| Land Area | 1.8 | 3.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ridgeville, SC | Varnville, SC | United States |
| Age 0 to 4 | 0.5% | 4.3% | 5.9% |
| Age 5 to 9 | 0.0% | 10.0% | 6.1% |
| Age 10 to 14 | 2.4% | 9.7% | 6.6% |
| Age 15 to 17 | 2.0% | 2.1% | 3.9% |
| Age 18 to 20 | 0.3% | 4.5% | 4.0% |
| Age 21 to 24 | 6.2% | 3.7% | 5.2% |
| Age 25 to 34 | 16.2% | 8.8% | 13.8% |
| Age 35 to 44 | 17.6% | 15.5% | 12.9% |
| Age 45 to 54 | 26.1% | 8.0% | 12.6% |
| Age 55 to 59 | 7.9% | 7.2% | 6.7% |
| Age 60 to 64 | 7.4% | 5.9% | 6.3% |
| Age 65 to 74 | 5.5% | 10.4% | 9.6% |
| Age 75 to 84 | 7.9% | 5.8% | 4.5% |
| Age 85 and over | 0.0% | 4.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ridgeville, SC | Varnville, SC | United States |
| White | 32.1% | 33.9% | 59.4% |
| Black | 52.7% | 61.9% | 12.2% |
| Asian | 0.3% | 2.7% | 5.6% |
| Native American | 0.3% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 10.5% | 0.4% | 3.2% |
| Hispanic | 4.1% | 1.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ridgeville, SC | Varnville, SC | United States |
| Married Population | 27.9% | 46.2% | 49.8% |
| Currently Married | 21.7% | 42.3% | 48.0% |
| Married but Separated | 6.2% | 4.0% | 1.8% |
| Single Population | 72.1% | 53.8% | 50.2% |
| Never Married | 51.7% | 35.3% | 33.8% |
| Divorced | 17.8% | 14.9% | 10.8% |
| Widowed | 2.7% | 3.6% | 5.6% |
| space5 | | | |
| Household Size | 2.25 | 2.76 | 2.60 |
| Households | 251 | 694 | 124,010,992 |
| Family Households | 161 | 387 | 80,755,759 |
| Married couple, w/children | 16.1% | 31.3% | 30.5% |
| Married couple, no children | 57.8% | 45.7% | 42.9% |
| Non Family Households | 90 | 307 | 43,255,233 |
| Single householder, w/children | 3.7% | 14.5% | 15.8% |
| Single householder, no children | 22.4% | 8.5% | 10.8% |