| | Westover, WV | Washington, PA | United States |
| Population | 4,085 | 13,322 | 329,725,481 |
| Female Population | 49.0% | 49.9% | 50.5% |
| Male Population | 51.0% | 50.2% | 49.5% |
| Median Age | 40.6 | 36.5 | 38.4 |
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| Population - 2010 | 4,000 | 14,026 | 309,327,143 |
| Population - 2000 | 3,941 | 15,268 | 285,036,114 |
| Population - 1990 | 4,201 | 15,864 | 251,960,433 |
| Pop. 2000 to Now | 7.1% | -13.2% | 15.6% |
| Pop. 1990 to Now | 0.5% | -16.5% | 30.8% |
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| Population Density | 2,717.9 | 4,519.0 | 93.4 |
| Land Area | 1.5 | 2.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Westover, WV | Washington, PA | United States |
| Age 0 to 4 | 1.5% | 6.3% | 5.9% |
| Age 5 to 9 | 3.3% | 4.7% | 6.1% |
| Age 10 to 14 | 1.6% | 3.4% | 6.6% |
| Age 15 to 17 | 4.1% | 2.5% | 3.9% |
| Age 18 to 20 | 1.8% | 9.3% | 4.0% |
| Age 21 to 24 | 6.4% | 7.3% | 5.2% |
| Age 25 to 34 | 22.9% | 14.4% | 13.8% |
| Age 35 to 44 | 15.7% | 9.8% | 12.9% |
| Age 45 to 54 | 16.0% | 13.6% | 12.6% |
| Age 55 to 59 | 7.4% | 8.6% | 6.7% |
| Age 60 to 64 | 6.8% | 5.2% | 6.3% |
| Age 65 to 74 | 7.0% | 9.8% | 9.6% |
| Age 75 to 84 | 2.6% | 3.8% | 4.5% |
| Age 85 and over | 3.0% | 1.3% | 1.9% |
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| Race | | | |
| | Westover, WV | Washington, PA | United States |
| White | 90.0% | 72.7% | 59.4% |
| Black | 3.9% | 14.6% | 12.2% |
| Asian | 0.5% | 1.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 3.0% | 6.4% | 3.2% |
| Hispanic | 2.6% | 4.3% | 18.4% |
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| Marriage & Family | | | |
| | Westover, WV | Washington, PA | United States |
| Married Population | 38.4% | 29.4% | 49.8% |
| Currently Married | 36.4% | 28.1% | 48.0% |
| Married but Separated | 2.0% | 1.3% | 1.8% |
| Single Population | 61.6% | 70.6% | 50.2% |
| Never Married | 39.1% | 48.0% | 33.8% |
| Divorced | 16.2% | 15.9% | 10.8% |
| Widowed | 6.3% | 6.7% | 5.6% |
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| Household Size | 1.93 | 2.04 | 2.60 |
| Households | 2,112 | 5,667 | 124,010,992 |
| Family Households | 900 | 2,665 | 80,755,759 |
| Married couple, w/children | 34.2% | 18.3% | 30.5% |
| Married couple, no children | 42.0% | 37.1% | 42.9% |
| Non Family Households | 1,212 | 3,002 | 43,255,233 |
| Single householder, w/children | 8.8% | 24.2% | 15.8% |
| Single householder, no children | 15.0% | 20.4% | 10.8% |