| | Jefferson, WV | Piedmont, WV | United States |
| Population | 651 | 873 | 329,725,481 |
| Female Population | 36.4% | 47.9% | 50.5% |
| Male Population | 63.6% | 52.1% | 49.5% |
| Median Age | 40.4 | 45.2 | 38.4 |
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| Population - 2010 | 411 | 873 | 309,327,143 |
| Population - 2000 | 567 | 1,014 | 285,036,114 |
| Population - 1990 | 651 | 1,094 | 251,960,433 |
| Pop. 2000 to Now | 9.7% | -21.9% | 15.6% |
| Pop. 1990 to Now | -4.5% | -27.6% | 30.8% |
| space4 | | | |
| Population Density | 1,949.1 | 2,291.3 | 93.4 |
| Land Area | 0.3 | 0.4 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Jefferson, WV | Piedmont, WV | United States |
| Age 0 to 4 | 9.2% | 1.4% | 5.9% |
| Age 5 to 9 | 5.8% | 13.3% | 6.1% |
| Age 10 to 14 | 7.1% | 4.8% | 6.6% |
| Age 15 to 17 | 1.2% | 4.4% | 3.9% |
| Age 18 to 20 | 1.2% | 5.6% | 4.0% |
| Age 21 to 24 | 7.7% | 3.4% | 5.2% |
| Age 25 to 34 | 7.8% | 9.2% | 13.8% |
| Age 35 to 44 | 13.7% | 7.3% | 12.9% |
| Age 45 to 54 | 7.2% | 17.2% | 12.6% |
| Age 55 to 59 | 5.5% | 9.0% | 6.7% |
| Age 60 to 64 | 13.1% | 5.6% | 6.3% |
| Age 65 to 74 | 7.2% | 10.4% | 9.6% |
| Age 75 to 84 | 7.4% | 7.3% | 4.5% |
| Age 85 and over | 5.8% | 1.0% | 1.9% |
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| Race | | | |
| | Jefferson, WV | Piedmont, WV | United States |
| White | 75.7% | 63.0% | 59.4% |
| Black | 20.7% | 30.2% | 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 | 3.5% | 4.9% | 3.2% |
| Hispanic | 0.0% | 1.8% | 18.4% |
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| Marriage & Family | | | |
| | Jefferson, WV | Piedmont, WV | United States |
| Married Population | 23.1% | 42.5% | 49.8% |
| Currently Married | 23.1% | 38.5% | 48.0% |
| Married but Separated | 0.0% | 4.0% | 1.8% |
| Single Population | 76.9% | 57.5% | 50.2% |
| Never Married | 30.8% | 32.3% | 33.8% |
| Divorced | 25.6% | 17.1% | 10.8% |
| Widowed | 20.5% | 8.1% | 5.6% |
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| Household Size | 2.47 | 2.95 | 2.60 |
| Households | 215 | 296 | 124,010,992 |
| Family Households | 113 | 129 | 80,755,759 |
| Married couple, w/children | 5.3% | 30.2% | 30.5% |
| Married couple, no children | 19.5% | 46.5% | 42.9% |
| Non Family Households | 102 | 167 | 43,255,233 |
| Single householder, w/children | 48.7% | 14.0% | 15.8% |
| Single householder, no children | 26.5% | 9.3% | 10.8% |