| | Great Falls, SC | Astor, FL | United States |
| Population | 1,860 | 1,425 | 329,725,481 |
| Female Population | 61.2% | 44.9% | 50.5% |
| Male Population | 38.8% | 55.1% | 49.5% |
| Median Age | 39.3 | 57.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,976 | 1,641 | 309,327,143 |
| Population - 2000 | 2,194 | 1,487 | 285,036,114 |
| Population - 1990 | 2,307 | 1,273 | 251,960,433 |
| Pop. 2000 to Now | -14.7% | 16.8% | 15.6% |
| Pop. 1990 to Now | -18.9% | 36.4% | 30.8% |
| space4 | | | |
| Population Density | 438.8 | 610.3 | 93.4 |
| Land Area | 4.2 | 2.3 | 3,531,905.4 |
| Water Area | 0.1 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Great Falls, SC | Astor, FL | United States |
| Age 0 to 4 | 11.4% | 0.0% | 5.9% |
| Age 5 to 9 | 6.5% | 4.4% | 6.1% |
| Age 10 to 14 | 4.9% | 5.7% | 6.6% |
| Age 15 to 17 | 2.4% | 4.6% | 3.9% |
| Age 18 to 20 | 3.0% | 1.3% | 4.0% |
| Age 21 to 24 | 1.5% | 0.7% | 5.2% |
| Age 25 to 34 | 16.0% | 2.0% | 13.8% |
| Age 35 to 44 | 11.5% | 10.8% | 12.9% |
| Age 45 to 54 | 14.1% | 11.2% | 12.6% |
| Age 55 to 59 | 6.7% | 14.0% | 6.7% |
| Age 60 to 64 | 3.2% | 15.0% | 6.3% |
| Age 65 to 74 | 8.5% | 16.4% | 9.6% |
| Age 75 to 84 | 4.9% | 13.3% | 4.5% |
| Age 85 and over | 5.4% | 0.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Great Falls, SC | Astor, FL | United States |
| White | 62.4% | 80.2% | 59.4% |
| Black | 29.7% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 3.8% | 10.2% | 3.2% |
| Hispanic | 3.5% | 9.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Great Falls, SC | Astor, FL | United States |
| Married Population | 42.1% | 48.7% | 49.8% |
| Currently Married | 35.2% | 43.1% | 48.0% |
| Married but Separated | 6.9% | 5.5% | 1.8% |
| Single Population | 57.9% | 51.3% | 50.2% |
| Never Married | 30.0% | 22.8% | 33.8% |
| Divorced | 15.4% | 14.4% | 10.8% |
| Widowed | 12.5% | 14.2% | 5.6% |
| space5 | | | |
| Household Size | 2.54 | 2.04 | 2.60 |
| Households | 733 | 698 | 124,010,992 |
| Family Households | 438 | 334 | 80,755,759 |
| Married couple, w/children | 19.9% | 12.0% | 30.5% |
| Married couple, no children | 32.4% | 61.4% | 42.9% |
| Non Family Households | 295 | 364 | 43,255,233 |
| Single householder, w/children | 25.1% | 15.6% | 15.8% |
| Single householder, no children | 22.6% | 11.1% | 10.8% |