| | St. Albans, WV | Chapmanville, WV | United States |
| Population | 10,842 | 911 | 329,725,481 |
| Female Population | 51.4% | 50.0% | 50.5% |
| Male Population | 48.6% | 50.1% | 49.5% |
| Median Age | 44 | 42.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 11,019 | 1,231 | 309,327,143 |
| Population - 2000 | 11,567 | 1,211 | 285,036,114 |
| Population - 1990 | 11,194 | 1,110 | 251,960,433 |
| Pop. 2000 to Now | -15.6% | -11.0% | 15.6% |
| Pop. 1990 to Now | -12.8% | -2.9% | 30.8% |
| space4 | | | |
| Population Density | 2,999.2 | 1,386.6 | 93.4 |
| Land Area | 3.6 | 0.7 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | St. Albans, WV | Chapmanville, WV | United States |
| Age 0 to 4 | 3.9% | 12.0% | 5.9% |
| Age 5 to 9 | 9.9% | 4.2% | 6.1% |
| Age 10 to 14 | 4.2% | 6.1% | 6.6% |
| Age 15 to 17 | 3.1% | 2.6% | 3.9% |
| Age 18 to 20 | 3.3% | 0.5% | 4.0% |
| Age 21 to 24 | 1.9% | 7.0% | 5.2% |
| Age 25 to 34 | 15.1% | 5.9% | 13.8% |
| Age 35 to 44 | 10.8% | 15.8% | 12.9% |
| Age 45 to 54 | 8.3% | 8.0% | 12.6% |
| Age 55 to 59 | 8.5% | 4.2% | 6.7% |
| Age 60 to 64 | 6.8% | 9.9% | 6.3% |
| Age 65 to 74 | 15.3% | 11.3% | 9.6% |
| Age 75 to 84 | 4.7% | 7.5% | 4.5% |
| Age 85 and over | 4.2% | 4.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | St. Albans, WV | Chapmanville, WV | United States |
| White | 92.2% | 100.0% | 59.4% |
| Black | 2.3% | 0.0% | 12.2% |
| Asian | 0.3% | 0.0% | 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 | 4.2% | 0.0% | 3.2% |
| Hispanic | 0.9% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | St. Albans, WV | Chapmanville, WV | United States |
| Married Population | 54.0% | 44.2% | 49.8% |
| Currently Married | 52.9% | 43.1% | 48.0% |
| Married but Separated | 1.1% | 1.1% | 1.8% |
| Single Population | 46.0% | 55.8% | 50.2% |
| Never Married | 24.4% | 22.9% | 33.8% |
| Divorced | 14.8% | 17.2% | 10.8% |
| Widowed | 6.8% | 15.7% | 5.6% |
| space5 | | | |
| Household Size | 2.39 | 2.21 | 2.60 |
| Households | 4,510 | 412 | 124,010,992 |
| Family Households | 2,883 | 215 | 80,755,759 |
| Married couple, w/children | 22.9% | 37.2% | 30.5% |
| Married couple, no children | 54.0% | 34.4% | 42.9% |
| Non Family Households | 1,627 | 197 | 43,255,233 |
| Single householder, w/children | 14.7% | 18.6% | 15.8% |
| Single householder, no children | 8.4% | 9.8% | 10.8% |