| | Salem, SC | Pelzer, SC | United States |
| Population | 150 | 1,335 | 329,725,481 |
| Female Population | 55.3% | 55.9% | 50.5% |
| Male Population | 44.7% | 44.1% | 49.5% |
| Median Age | 40.4 | 48.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 143 | 1,292 | 309,327,143 |
| Population - 2000 | 126 | 97 | 285,036,114 |
| Population - 1990 | 192 | 81 | 251,960,433 |
| Pop. 2000 to Now | 21.4% | 1,356.7% | 15.6% |
| Pop. 1990 to Now | -20.3% | 1,644.4% | 30.8% |
| space4 | | | |
| Population Density | 163.9 | 1,460.6 | 93.4 |
| Land Area | 0.9 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Salem, SC | Pelzer, SC | United States |
| Age 0 to 4 | 8.7% | 1.3% | 5.9% |
| Age 5 to 9 | 2.7% | 8.5% | 6.1% |
| Age 10 to 14 | 13.3% | 8.7% | 6.6% |
| Age 15 to 17 | 2.7% | 3.1% | 3.9% |
| Age 18 to 20 | 0.7% | 3.1% | 4.0% |
| Age 21 to 24 | 6.0% | 1.8% | 5.2% |
| Age 25 to 34 | 8.0% | 8.8% | 13.8% |
| Age 35 to 44 | 14.7% | 10.1% | 12.9% |
| Age 45 to 54 | 8.7% | 13.6% | 12.6% |
| Age 55 to 59 | 12.0% | 7.0% | 6.7% |
| Age 60 to 64 | 9.3% | 4.8% | 6.3% |
| Age 65 to 74 | 9.3% | 21.9% | 9.6% |
| Age 75 to 84 | 1.3% | 6.9% | 4.5% |
| Age 85 and over | 2.7% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Salem, SC | Pelzer, SC | United States |
| White | 97.3% | 89.4% | 59.4% |
| Black | 0.0% | 1.3% | 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 | 2.7% | 2.2% | 3.2% |
| Hispanic | 0.0% | 7.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Salem, SC | Pelzer, SC | United States |
| Married Population | 46.9% | 45.1% | 49.8% |
| Currently Married | 46.9% | 43.1% | 48.0% |
| Married but Separated | 0.0% | 2.0% | 1.8% |
| Single Population | 53.1% | 54.9% | 50.2% |
| Never Married | 30.1% | 21.5% | 33.8% |
| Divorced | 12.4% | 28.0% | 10.8% |
| Widowed | 10.6% | 5.3% | 5.6% |
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| Household Size | 3.13 | 2.07 | 2.60 |
| Households | 48 | 645 | 124,010,992 |
| Family Households | 32 | 322 | 80,755,759 |
| Married couple, w/children | 18.8% | 23.3% | 30.5% |
| Married couple, no children | 56.3% | 44.7% | 42.9% |
| Non Family Households | 16 | 323 | 43,255,233 |
| Single householder, w/children | 6.3% | 15.5% | 15.8% |
| Single householder, no children | 18.8% | 16.5% | 10.8% |