| | Red Bank, SC | Blythewood, SC | United States |
| Population | 10,070 | 4,543 | 329,725,481 |
| Female Population | 52.3% | 53.3% | 50.5% |
| Male Population | 47.7% | 46.7% | 49.5% |
| Median Age | 39 | 43.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,084 | 2,056 | 309,327,143 |
| Population - 2000 | 8,811 | 170 | 285,036,114 |
| Population - 1990 | 5,950 | 164 | 251,960,433 |
| Pop. 2000 to Now | 12.8% | 2,565.3% | 15.6% |
| Pop. 1990 to Now | 67.0% | 2,662.8% | 30.8% |
| space4 | | | |
| Population Density | 852.5 | 427.0 | 93.4 |
| Land Area | 11.8 | 10.6 | 3,531,905.4 |
| Water Area | 0.2 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Red Bank, SC | Blythewood, SC | United States |
| Age 0 to 4 | 3.7% | 4.8% | 5.9% |
| Age 5 to 9 | 5.2% | 8.0% | 6.1% |
| Age 10 to 14 | 9.3% | 8.9% | 6.6% |
| Age 15 to 17 | 2.4% | 3.9% | 3.9% |
| Age 18 to 20 | 4.0% | 1.7% | 4.0% |
| Age 21 to 24 | 5.1% | 3.5% | 5.2% |
| Age 25 to 34 | 12.6% | 9.9% | 13.8% |
| Age 35 to 44 | 14.6% | 11.8% | 12.9% |
| Age 45 to 54 | 15.3% | 15.9% | 12.6% |
| Age 55 to 59 | 5.6% | 11.3% | 6.7% |
| Age 60 to 64 | 10.4% | 7.8% | 6.3% |
| Age 65 to 74 | 8.1% | 7.1% | 9.6% |
| Age 75 to 84 | 3.8% | 1.3% | 4.5% |
| Age 85 and over | 0.1% | 4.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Red Bank, SC | Blythewood, SC | United States |
| White | 79.4% | 49.2% | 59.4% |
| Black | 9.8% | 40.0% | 12.2% |
| Asian | 1.0% | 3.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.0% | 0.4% |
| Two or More Races | 4.7% | 0.2% | 3.2% |
| Hispanic | 4.8% | 7.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Red Bank, SC | Blythewood, SC | United States |
| Married Population | 52.7% | 68.3% | 49.8% |
| Currently Married | 50.7% | 68.2% | 48.0% |
| Married but Separated | 2.0% | 0.2% | 1.8% |
| Single Population | 47.3% | 31.7% | 50.2% |
| Never Married | 26.8% | 22.7% | 33.8% |
| Divorced | 15.4% | 6.6% | 10.8% |
| Widowed | 5.2% | 2.3% | 5.6% |
| space5 | | | |
| Household Size | 2.42 | 2.68 | 2.60 |
| Households | 4,150 | 1,697 | 124,010,992 |
| Family Households | 2,995 | 1,212 | 80,755,759 |
| Married couple, w/children | 19.8% | 39.7% | 30.5% |
| Married couple, no children | 44.7% | 53.7% | 42.9% |
| Non Family Households | 1,155 | 485 | 43,255,233 |
| Single householder, w/children | 20.8% | 5.1% | 15.8% |
| Single householder, no children | 14.7% | 1.5% | 10.8% |