| | Manchester, NY | West Milford, WV | United States |
| Population | 9,392 | 456 | 329,725,481 |
| Female Population | 49.0% | 61.0% | 50.5% |
| Male Population | 51.1% | 39.0% | 49.5% |
| Median Age | 45 | 41.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 9,344 | 632 | 309,327,143 |
| Population - 2000 | 9,258 | 651 | 285,036,114 |
| Population - 1990 | 9,351 | 519 | 251,960,433 |
| Pop. 2000 to Now | -1.7% | -6.5% | 15.6% |
| Pop. 1990 to Now | -2.7% | 17.3% | 30.8% |
| space4 | | | |
| Population Density | 248.4 | 858.8 | 93.4 |
| Land Area | 37.8 | 0.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Manchester, NY | West Milford, WV | United States |
| Age 0 to 4 | 4.2% | 2.0% | 5.9% |
| Age 5 to 9 | 6.1% | 4.4% | 6.1% |
| Age 10 to 14 | 6.2% | 11.0% | 6.6% |
| Age 15 to 17 | 2.6% | 1.3% | 3.9% |
| Age 18 to 20 | 2.5% | 4.2% | 4.0% |
| Age 21 to 24 | 3.2% | 11.0% | 5.2% |
| Age 25 to 34 | 13.0% | 6.6% | 13.8% |
| Age 35 to 44 | 12.1% | 16.2% | 12.9% |
| Age 45 to 54 | 14.9% | 16.0% | 12.6% |
| Age 55 to 59 | 8.6% | 13.4% | 6.7% |
| Age 60 to 64 | 6.3% | 5.5% | 6.3% |
| Age 65 to 74 | 9.4% | 4.6% | 9.6% |
| Age 75 to 84 | 5.7% | 3.5% | 4.5% |
| Age 85 and over | 5.3% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Manchester, NY | West Milford, WV | United States |
| White | 92.3% | 97.6% | 59.4% |
| Black | 0.3% | 0.0% | 12.2% |
| Asian | 0.3% | 0.0% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.7% | 2.4% | 3.2% |
| Hispanic | 5.2% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Manchester, NY | West Milford, WV | United States |
| Married Population | 56.2% | 56.2% | 49.8% |
| Currently Married | 53.3% | 56.2% | 48.0% |
| Married but Separated | 2.8% | 0.0% | 1.8% |
| Single Population | 43.9% | 43.8% | 50.2% |
| Never Married | 24.7% | 28.4% | 33.8% |
| Divorced | 13.1% | 12.5% | 10.8% |
| Widowed | 6.1% | 2.9% | 5.6% |
| space5 | | | |
| Household Size | 2.44 | 2.35 | 2.60 |
| Households | 3,766 | 194 | 124,010,992 |
| Family Households | 2,555 | 136 | 80,755,759 |
| Married couple, w/children | 25.6% | 21.3% | 30.5% |
| Married couple, no children | 50.8% | 55.1% | 42.9% |
| Non Family Households | 1,211 | 58 | 43,255,233 |
| Single householder, w/children | 13.8% | 11.8% | 15.8% |
| Single householder, no children | 9.7% | 11.8% | 10.8% |