| | Mount Wolf, PA | Hartsville, SC | United States |
| Population | 1,417 | 7,565 | 329,725,481 |
| Female Population | 49.3% | 55.0% | 50.5% |
| Male Population | 50.7% | 45.0% | 49.5% |
| Median Age | 42.9 | 29.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,396 | 7,732 | 309,327,143 |
| Population - 2000 | 1,373 | 7,556 | 285,036,114 |
| Population - 1990 | 1,365 | 8,372 | 251,960,433 |
| Pop. 2000 to Now | 0.5% | -1.0% | 15.6% |
| Pop. 1990 to Now | 1.1% | -10.7% | 30.8% |
| space4 | | | |
| Population Density | 2,704.2 | 1,324.6 | 93.4 |
| Land Area | 0.5 | 5.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mount Wolf, PA | Hartsville, SC | United States |
| Age 0 to 4 | 3.7% | 9.1% | 5.9% |
| Age 5 to 9 | 8.1% | 9.1% | 6.1% |
| Age 10 to 14 | 9.4% | 8.6% | 6.6% |
| Age 15 to 17 | 3.1% | 3.7% | 3.9% |
| Age 18 to 20 | 2.4% | 6.7% | 4.0% |
| Age 21 to 24 | 0.9% | 5.6% | 5.2% |
| Age 25 to 34 | 14.0% | 11.5% | 13.8% |
| Age 35 to 44 | 10.2% | 8.2% | 12.9% |
| Age 45 to 54 | 14.4% | 11.1% | 12.6% |
| Age 55 to 59 | 5.9% | 7.6% | 6.7% |
| Age 60 to 64 | 7.1% | 3.6% | 6.3% |
| Age 65 to 74 | 15.7% | 9.2% | 9.6% |
| Age 75 to 84 | 4.2% | 3.8% | 4.5% |
| Age 85 and over | 1.0% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mount Wolf, PA | Hartsville, SC | United States |
| White | 95.2% | 47.4% | 59.4% |
| Black | 1.1% | 49.5% | 12.2% |
| Asian | 0.0% | 0.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 1.8% | 1.0% | 3.2% |
| Hispanic | 1.7% | 1.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mount Wolf, PA | Hartsville, SC | United States |
| Married Population | 54.4% | 36.5% | 49.8% |
| Currently Married | 53.6% | 32.9% | 48.0% |
| Married but Separated | 0.8% | 3.6% | 1.8% |
| Single Population | 45.6% | 63.5% | 50.2% |
| Never Married | 21.1% | 44.6% | 33.8% |
| Divorced | 22.4% | 12.0% | 10.8% |
| Widowed | 2.1% | 6.9% | 5.6% |
| space5 | | | |
| Household Size | 2.40 | 2.46 | 2.60 |
| Households | 590 | 2,859 | 124,010,992 |
| Family Households | 434 | 1,647 | 80,755,759 |
| Married couple, w/children | 18.9% | 20.6% | 30.5% |
| Married couple, no children | 49.3% | 33.0% | 42.9% |
| Non Family Households | 156 | 1,212 | 43,255,233 |
| Single householder, w/children | 24.4% | 32.1% | 15.8% |
| Single householder, no children | 7.4% | 14.3% | 10.8% |