| | Brookhaven, WV | Bethlehem, WV | United States |
| Population | 6,606 | 2,559 | 329,725,481 |
| Female Population | 50.0% | 48.9% | 50.5% |
| Male Population | 50.0% | 51.1% | 49.5% |
| Median Age | 36.2 | 40.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,307 | 2,493 | 309,327,143 |
| Population - 2000 | 4,734 | 2,651 | 285,036,114 |
| Population - 1990 | 3,836 | 2,694 | 251,960,433 |
| Pop. 2000 to Now | 17.6% | -13.3% | 15.6% |
| Pop. 1990 to Now | 45.2% | -14.7% | 30.8% |
| space4 | | | |
| Population Density | 716.1 | 722.1 | 93.4 |
| Land Area | 9.2 | 3.5 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Brookhaven, WV | Bethlehem, WV | United States |
| Age 0 to 4 | 11.7% | 6.7% | 5.9% |
| Age 5 to 9 | 5.3% | 8.3% | 6.1% |
| Age 10 to 14 | 7.4% | 5.7% | 6.6% |
| Age 15 to 17 | 3.0% | 3.1% | 3.9% |
| Age 18 to 20 | 2.0% | 0.9% | 4.0% |
| Age 21 to 24 | 4.0% | 2.9% | 5.2% |
| Age 25 to 34 | 15.0% | 12.8% | 13.8% |
| Age 35 to 44 | 14.2% | 13.7% | 12.9% |
| Age 45 to 54 | 9.3% | 12.7% | 12.6% |
| Age 55 to 59 | 8.3% | 5.7% | 6.7% |
| Age 60 to 64 | 8.2% | 7.2% | 6.3% |
| Age 65 to 74 | 6.8% | 12.4% | 9.6% |
| Age 75 to 84 | 3.8% | 4.4% | 4.5% |
| Age 85 and over | 1.0% | 3.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Brookhaven, WV | Bethlehem, WV | United States |
| White | 92.2% | 99.0% | 59.4% |
| Black | 1.2% | 0.1% | 12.2% |
| Asian | 0.7% | 0.4% | 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 | 2.5% | 0.3% | 3.2% |
| Hispanic | 3.4% | 0.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Brookhaven, WV | Bethlehem, WV | United States |
| Married Population | 55.1% | 68.4% | 49.8% |
| Currently Married | 54.7% | 67.5% | 48.0% |
| Married but Separated | 0.4% | 0.8% | 1.8% |
| Single Population | 44.9% | 31.6% | 50.2% |
| Never Married | 26.8% | 17.0% | 33.8% |
| Divorced | 13.5% | 6.9% | 10.8% |
| Widowed | 4.7% | 7.8% | 5.6% |
| space5 | | | |
| Household Size | 2.92 | 2.45 | 2.60 |
| Households | 2,259 | 1,043 | 124,010,992 |
| Family Households | 1,826 | 762 | 80,755,759 |
| Married couple, w/children | 36.5% | 32.9% | 30.5% |
| Married couple, no children | 36.7% | 56.7% | 42.9% |
| Non Family Households | 433 | 281 | 43,255,233 |
| Single householder, w/children | 14.6% | 4.5% | 15.8% |
| Single householder, no children | 12.2% | 5.9% | 10.8% |