| | Masontown, WV | Kingwood, WV | United States |
| Population | 526 | 3,091 | 329,725,481 |
| Female Population | 42.8% | 53.2% | 50.5% |
| Male Population | 57.2% | 46.8% | 49.5% |
| Median Age | 48.5 | 40.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 548 | 3,049 | 309,327,143 |
| Population - 2000 | 647 | 2,944 | 285,036,114 |
| Population - 1990 | 737 | 3,243 | 251,960,433 |
| Pop. 2000 to Now | -17.0% | 3.5% | 15.6% |
| Pop. 1990 to Now | -27.1% | -6.0% | 30.8% |
| space4 | | | |
| Population Density | 1,892.1 | 1,272.5 | 93.4 |
| Land Area | 0.3 | 2.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Masontown, WV | Kingwood, WV | United States |
| Age 0 to 4 | 2.1% | 7.3% | 5.9% |
| Age 5 to 9 | 0.4% | 6.1% | 6.1% |
| Age 10 to 14 | 6.8% | 3.5% | 6.6% |
| Age 15 to 17 | 5.5% | 2.3% | 3.9% |
| Age 18 to 20 | 2.3% | 1.8% | 4.0% |
| Age 21 to 24 | 5.3% | 4.2% | 5.2% |
| Age 25 to 34 | 13.5% | 15.4% | 13.8% |
| Age 35 to 44 | 8.2% | 12.5% | 12.9% |
| Age 45 to 54 | 18.6% | 15.6% | 12.6% |
| Age 55 to 59 | 4.0% | 3.5% | 6.7% |
| Age 60 to 64 | 7.2% | 8.0% | 6.3% |
| Age 65 to 74 | 13.7% | 9.9% | 9.6% |
| Age 75 to 84 | 7.6% | 7.3% | 4.5% |
| Age 85 and over | 4.8% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Masontown, WV | Kingwood, WV | United States |
| White | 97.1% | 93.3% | 59.4% |
| Black | 0.0% | 2.3% | 12.2% |
| Asian | 0.0% | 0.9% | 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 | 2.9% | 2.3% | 3.2% |
| Hispanic | 0.0% | 1.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Masontown, WV | Kingwood, WV | United States |
| Married Population | 54.3% | 56.8% | 49.8% |
| Currently Married | 50.9% | 52.7% | 48.0% |
| Married but Separated | 3.4% | 4.1% | 1.8% |
| Single Population | 45.7% | 43.2% | 50.2% |
| Never Married | 30.6% | 25.2% | 33.8% |
| Divorced | 7.5% | 9.5% | 10.8% |
| Widowed | 7.5% | 8.5% | 5.6% |
| space5 | | | |
| Household Size | 2.29 | 2.32 | 2.60 |
| Households | 230 | 1,289 | 124,010,992 |
| Family Households | 118 | 840 | 80,755,759 |
| Married couple, w/children | 37.3% | 25.6% | 30.5% |
| Married couple, no children | 51.7% | 52.9% | 42.9% |
| Non Family Households | 112 | 449 | 43,255,233 |
| Single householder, w/children | 2.5% | 15.1% | 15.8% |
| Single householder, no children | 8.5% | 6.4% | 10.8% |