| | Woodbridge township, NJ | Washington, DC | United States |
| Population | 103,353 | 683,154 | 329,725,481 |
| Female Population | 48.7% | 52.4% | 50.5% |
| Male Population | 51.3% | 47.7% | 49.5% |
| Median Age | 40.2 | 34.3 | 38.4 |
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| Population - 2010 | 99,360 | 605,282 | 309,327,143 |
| Population - 2000 | 97,203 | 572,059 | 285,036,114 |
| Population - 1990 | 93,086 | 606,900 | 251,960,433 |
| Pop. 2000 to Now | 2.3% | 24.6% | 15.6% |
| Pop. 1990 to Now | 6.8% | 17.5% | 30.8% |
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| Population Density | 4,452.4 | 11,174.3 | 93.4 |
| Land Area | 23.2 | 61.1 | 3,531,905.4 |
| Water Area | 1.3 | 7.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Woodbridge township, NJ | Washington, DC | United States |
| Age 0 to 4 | 5.9% | 6.3% | 5.9% |
| Age 5 to 9 | 6.0% | 5.1% | 6.1% |
| Age 10 to 14 | 5.8% | 4.6% | 6.6% |
| Age 15 to 17 | 3.7% | 2.3% | 3.9% |
| Age 18 to 20 | 2.9% | 4.5% | 4.0% |
| Age 21 to 24 | 3.8% | 5.8% | 5.2% |
| Age 25 to 34 | 13.8% | 22.8% | 13.8% |
| Age 35 to 44 | 14.3% | 15.6% | 12.9% |
| Age 45 to 54 | 15.0% | 10.8% | 12.6% |
| Age 55 to 59 | 7.2% | 5.2% | 6.7% |
| Age 60 to 64 | 6.4% | 4.9% | 6.3% |
| Age 65 to 74 | 9.0% | 7.2% | 9.6% |
| Age 75 to 84 | 4.5% | 3.5% | 4.5% |
| Age 85 and over | 1.7% | 1.5% | 1.9% |
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| Race | | | |
| | Woodbridge township, NJ | Washington, DC | United States |
| White | 39.9% | 36.7% | 59.4% |
| Black | 11.3% | 43.9% | 12.2% |
| Asian | 22.9% | 4.0% | 5.6% |
| Native American | 0.2% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.5% | 0.5% | 0.4% |
| Two or More Races | 2.4% | 3.5% | 3.2% |
| Hispanic | 22.9% | 11.3% | 18.4% |
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| Marriage & Family | | | |
| | Woodbridge township, NJ | Washington, DC | United States |
| Married Population | 54.8% | 32.6% | 49.8% |
| Currently Married | 53.5% | 30.9% | 48.0% |
| Married but Separated | 1.3% | 1.7% | 1.8% |
| Single Population | 45.2% | 67.4% | 50.2% |
| Never Married | 31.4% | 55.8% | 33.8% |
| Divorced | 8.1% | 8.2% | 10.8% |
| Widowed | 5.8% | 3.5% | 5.6% |
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| Household Size | 2.83 | 2.08 | 2.60 |
| Households | 35,191 | 310,104 | 124,010,992 |
| Family Households | 26,535 | 131,196 | 80,755,759 |
| Married couple, w/children | 36.6% | 24.1% | 30.5% |
| Married couple, no children | 39.4% | 36.8% | 42.9% |
| Non Family Households | 8,656 | 178,908 | 43,255,233 |
| Single householder, w/children | 11.8% | 22.8% | 15.8% |
| Single householder, no children | 12.3% | 16.2% | 10.8% |