| | Black, AL | Harpersville, AL | United States |
| Population | 395 | 1,589 | 329,725,481 |
| Female Population | 53.2% | 55.1% | 50.5% |
| Male Population | 46.8% | 44.9% | 49.5% |
| Median Age | 28.8 | 42.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 205 | 1,658 | 309,327,143 |
| Population - 2000 | 202 | 1,620 | 285,036,114 |
| Population - 1990 | 174 | 772 | 251,960,433 |
| Pop. 2000 to Now | 0.5% | 7.9% | 15.6% |
| Pop. 1990 to Now | 16.7% | 126.4% | 30.8% |
| space4 | | | |
| Population Density | 128.2 | 74.7 | 93.4 |
| Land Area | 3.1 | 21.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Black, AL | Harpersville, AL | United States |
| Age 0 to 4 | 21.0% | 2.6% | 5.9% |
| Age 5 to 9 | 12.2% | 11.0% | 6.1% |
| Age 10 to 14 | 2.3% | 8.3% | 6.6% |
| Age 15 to 17 | 0.0% | 0.8% | 3.9% |
| Age 18 to 20 | 0.0% | 3.1% | 4.0% |
| Age 21 to 24 | 0.8% | 2.9% | 5.2% |
| Age 25 to 34 | 21.0% | 7.0% | 13.8% |
| Age 35 to 44 | 18.0% | 15.2% | 12.9% |
| Age 45 to 54 | 8.1% | 12.6% | 12.6% |
| Age 55 to 59 | 5.1% | 9.2% | 6.7% |
| Age 60 to 64 | 2.8% | 5.3% | 6.3% |
| Age 65 to 74 | 7.8% | 13.8% | 9.6% |
| Age 75 to 84 | 0.3% | 6.9% | 4.5% |
| Age 85 and over | 0.8% | 1.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Black, AL | Harpersville, AL | United States |
| White | 99.7% | 78.8% | 59.4% |
| Black | 0.0% | 19.5% | 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 | 0.0% | 1.7% | 3.2% |
| Hispanic | 0.3% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Black, AL | Harpersville, AL | United States |
| Married Population | 86.7% | 55.9% | 49.8% |
| Currently Married | 86.7% | 53.1% | 48.0% |
| Married but Separated | 0.0% | 2.8% | 1.8% |
| Single Population | 13.3% | 44.1% | 50.2% |
| Never Married | 6.3% | 19.4% | 33.8% |
| Divorced | 5.5% | 18.5% | 10.8% |
| Widowed | 1.6% | 6.2% | 5.6% |
| space5 | | | |
| Household Size | 2.93 | 2.68 | 2.60 |
| Households | 135 | 592 | 124,010,992 |
| Family Households | 121 | 420 | 80,755,759 |
| Married couple, w/children | 63.6% | 29.3% | 30.5% |
| Married couple, no children | 29.8% | 46.9% | 42.9% |
| Non Family Households | 14 | 172 | 43,255,233 |
| Single householder, w/children | 6.6% | 11.2% | 15.8% |
| Single householder, no children | 0.0% | 12.6% | 10.8% |