| | Elmont, NY | Westwood, MA | United States |
| Population | 36,741 | 16,066 | 329,725,481 |
| Female Population | 50.4% | 51.6% | 50.5% |
| Male Population | 49.6% | 48.4% | 49.5% |
| Median Age | 39.2 | 44.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 34,486 | 14,655 | 309,327,143 |
| Population - 2000 | 32,657 | 14,117 | 285,036,114 |
| Population - 1990 | 28,612 | 12,557 | 251,960,433 |
| Pop. 2000 to Now | 11.9% | 16.1% | 15.6% |
| Pop. 1990 to Now | 27.7% | 30.5% | 30.8% |
| space4 | | | |
| Population Density | 10,774.5 | 1,476.4 | 93.4 |
| Land Area | 3.4 | 10.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Elmont, NY | Westwood, MA | United States |
| Age 0 to 4 | 5.6% | 5.7% | 5.9% |
| Age 5 to 9 | 3.6% | 8.2% | 6.1% |
| Age 10 to 14 | 6.5% | 6.5% | 6.6% |
| Age 15 to 17 | 3.5% | 5.2% | 3.9% |
| Age 18 to 20 | 3.8% | 3.1% | 4.0% |
| Age 21 to 24 | 5.2% | 4.3% | 5.2% |
| Age 25 to 34 | 16.0% | 7.8% | 13.8% |
| Age 35 to 44 | 12.7% | 10.2% | 12.9% |
| Age 45 to 54 | 14.0% | 14.8% | 12.6% |
| Age 55 to 59 | 6.5% | 9.2% | 6.7% |
| Age 60 to 64 | 7.0% | 6.7% | 6.3% |
| Age 65 to 74 | 10.0% | 6.6% | 9.6% |
| Age 75 to 84 | 3.3% | 7.3% | 4.5% |
| Age 85 and over | 2.1% | 4.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Elmont, NY | Westwood, MA | United States |
| White | 14.0% | 78.3% | 59.4% |
| Black | 43.4% | 2.9% | 12.2% |
| Asian | 13.8% | 11.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.5% | 0.5% | 0.4% |
| Two or More Races | 5.4% | 3.0% | 3.2% |
| Hispanic | 21.8% | 3.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Elmont, NY | Westwood, MA | United States |
| Married Population | 47.9% | 64.7% | 49.8% |
| Currently Married | 46.2% | 63.8% | 48.0% |
| Married but Separated | 1.7% | 0.9% | 1.8% |
| Single Population | 52.1% | 35.3% | 50.2% |
| Never Married | 38.5% | 24.0% | 33.8% |
| Divorced | 7.9% | 5.3% | 10.8% |
| Widowed | 5.8% | 6.1% | 5.6% |
| space5 | | | |
| Household Size | 3.67 | 2.94 | 2.60 |
| Households | 10,009 | 5,424 | 124,010,992 |
| Family Households | 8,374 | 4,389 | 80,755,759 |
| Married couple, w/children | 36.7% | 42.7% | 30.5% |
| Married couple, no children | 31.6% | 46.8% | 42.9% |
| Non Family Households | 1,635 | 1,035 | 43,255,233 |
| Single householder, w/children | 12.1% | 3.8% | 15.8% |
| Single householder, no children | 19.6% | 6.7% | 10.8% |