| | West Valley, NY | Dunkirk, NY | United States |
| Population | 613 | 12,651 | 329,725,481 |
| Female Population | 46.7% | 49.0% | 50.5% |
| Male Population | 53.3% | 51.0% | 49.5% |
| Median Age | 47.9 | 42.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 448 | 12,527 | 309,327,143 |
| Population - 2000 | 467 | 13,131 | 285,036,114 |
| Population - 1990 | 416 | 13,989 | 251,960,433 |
| Pop. 2000 to Now | 39.6% | -10.9% | 15.6% |
| Pop. 1990 to Now | 56.7% | -16.4% | 30.8% |
| space4 | | | |
| Population Density | 400.1 | 2,808.2 | 93.4 |
| Land Area | 1.5 | 4.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | West Valley, NY | Dunkirk, NY | United States |
| Age 0 to 4 | 7.7% | 5.3% | 5.9% |
| Age 5 to 9 | 7.5% | 6.0% | 6.1% |
| Age 10 to 14 | 9.3% | 5.0% | 6.6% |
| Age 15 to 17 | 1.0% | 2.7% | 3.9% |
| Age 18 to 20 | 1.6% | 3.3% | 4.0% |
| Age 21 to 24 | 4.9% | 6.0% | 5.2% |
| Age 25 to 34 | 6.4% | 12.8% | 13.8% |
| Age 35 to 44 | 9.8% | 11.7% | 12.9% |
| Age 45 to 54 | 6.0% | 11.9% | 12.6% |
| Age 55 to 59 | 19.7% | 7.6% | 6.7% |
| Age 60 to 64 | 0.7% | 9.7% | 6.3% |
| Age 65 to 74 | 12.1% | 11.6% | 9.6% |
| Age 75 to 84 | 11.1% | 4.7% | 4.5% |
| Age 85 and over | 2.3% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | West Valley, NY | Dunkirk, NY | United States |
| White | 87.6% | 61.9% | 59.4% |
| Black | 2.3% | 6.9% | 12.2% |
| Asian | 0.0% | 0.1% | 5.6% |
| Native American | 1.6% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.8% | 2.6% | 3.2% |
| Hispanic | 5.7% | 28.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | West Valley, NY | Dunkirk, NY | United States |
| Married Population | 53.3% | 37.8% | 49.8% |
| Currently Married | 50.5% | 36.3% | 48.0% |
| Married but Separated | 2.8% | 1.6% | 1.8% |
| Single Population | 46.7% | 62.2% | 50.2% |
| Never Married | 19.2% | 41.5% | 33.8% |
| Divorced | 20.1% | 13.6% | 10.8% |
| Widowed | 7.3% | 7.1% | 5.6% |
| space5 | | | |
| Household Size | 2.85 | 2.11 | 2.60 |
| Households | 215 | 5,948 | 124,010,992 |
| Family Households | 161 | 3,256 | 80,755,759 |
| Married couple, w/children | 29.2% | 16.3% | 30.5% |
| Married couple, no children | 41.0% | 40.0% | 42.9% |
| Non Family Households | 54 | 2,692 | 43,255,233 |
| Single householder, w/children | 10.6% | 27.2% | 15.8% |
| Single householder, no children | 19.3% | 16.4% | 10.8% |