| | Westwood, NJ | Bergenfield, NJ | United States |
| Population | 11,267 | 28,282 | 329,725,481 |
| Female Population | 51.4% | 50.3% | 50.5% |
| Male Population | 48.7% | 49.7% | 49.5% |
| Median Age | 42.4 | 39.2 | 38.4 |
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| Population - 2010 | 10,956 | 26,867 | 309,327,143 |
| Population - 2000 | 10,999 | 26,247 | 285,036,114 |
| Population - 1990 | 10,446 | 24,458 | 251,960,433 |
| Pop. 2000 to Now | 0.2% | 4.3% | 15.6% |
| Pop. 1990 to Now | 5.5% | 11.9% | 30.8% |
| space4 | | | |
| Population Density | 4,987.6 | 9,739.0 | 93.4 |
| Land Area | 2.3 | 2.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Westwood, NJ | Bergenfield, NJ | United States |
| Age 0 to 4 | 3.3% | 6.3% | 5.9% |
| Age 5 to 9 | 7.3% | 5.6% | 6.1% |
| Age 10 to 14 | 7.1% | 6.6% | 6.6% |
| Age 15 to 17 | 2.9% | 3.2% | 3.9% |
| Age 18 to 20 | 2.2% | 4.1% | 4.0% |
| Age 21 to 24 | 4.3% | 5.5% | 5.2% |
| Age 25 to 34 | 9.5% | 12.8% | 13.8% |
| Age 35 to 44 | 17.1% | 12.7% | 12.9% |
| Age 45 to 54 | 13.9% | 12.1% | 12.6% |
| Age 55 to 59 | 5.3% | 7.6% | 6.7% |
| Age 60 to 64 | 4.7% | 7.2% | 6.3% |
| Age 65 to 74 | 10.5% | 10.1% | 9.6% |
| Age 75 to 84 | 8.7% | 3.8% | 4.5% |
| Age 85 and over | 3.2% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Westwood, NJ | Bergenfield, NJ | United States |
| White | 63.7% | 36.3% | 59.4% |
| Black | 1.6% | 7.9% | 12.2% |
| Asian | 9.6% | 26.3% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.2% | 0.3% | 0.4% |
| Two or More Races | 3.8% | 1.0% | 3.2% |
| Hispanic | 20.0% | 28.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Westwood, NJ | Bergenfield, NJ | United States |
| Married Population | 54.0% | 52.7% | 49.8% |
| Currently Married | 51.1% | 50.9% | 48.0% |
| Married but Separated | 2.9% | 1.8% | 1.8% |
| Single Population | 46.0% | 47.3% | 50.2% |
| Never Married | 28.2% | 34.0% | 33.8% |
| Divorced | 11.9% | 7.6% | 10.8% |
| Widowed | 5.9% | 5.6% | 5.6% |
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| Household Size | 2.57 | 3.09 | 2.60 |
| Households | 4,364 | 9,146 | 124,010,992 |
| Family Households | 3,051 | 6,880 | 80,755,759 |
| Married couple, w/children | 35.9% | 39.4% | 30.5% |
| Married couple, no children | 36.8% | 35.8% | 42.9% |
| Non Family Households | 1,313 | 2,266 | 43,255,233 |
| Single householder, w/children | 11.4% | 10.6% | 15.8% |
| Single householder, no children | 16.0% | 14.2% | 10.8% |