| | Kingwood, NJ | Mullica, NJ | United States |
| Population | 3,793 | 5,839 | 329,725,481 |
| Female Population | 48.4% | 48.8% | 50.5% |
| Male Population | 51.6% | 51.2% | 49.5% |
| Median Age | 49.2 | 45.6 | 38.4 |
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| Population - 2010 | 3,824 | 6,142 | 309,327,143 |
| Population - 2000 | 3,782 | 5,912 | 285,036,114 |
| Population - 1990 | 3,325 | 5,896 | 251,960,433 |
| Pop. 2000 to Now | -0.8% | -1.3% | 15.6% |
| Pop. 1990 to Now | 12.9% | -1.0% | 30.8% |
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| Population Density | 107.9 | 103.5 | 93.4 |
| Land Area | 35.2 | 56.4 | 3,531,905.4 |
| Water Area | 0.6 | 0.5 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Kingwood, NJ | Mullica, NJ | United States |
| Age 0 to 4 | 2.0% | 4.3% | 5.9% |
| Age 5 to 9 | 7.9% | 7.2% | 6.1% |
| Age 10 to 14 | 3.9% | 5.8% | 6.6% |
| Age 15 to 17 | 1.8% | 5.9% | 3.9% |
| Age 18 to 20 | 1.3% | 2.0% | 4.0% |
| Age 21 to 24 | 4.9% | 2.2% | 5.2% |
| Age 25 to 34 | 8.6% | 9.5% | 13.8% |
| Age 35 to 44 | 14.4% | 11.7% | 12.9% |
| Age 45 to 54 | 15.8% | 17.8% | 12.6% |
| Age 55 to 59 | 5.8% | 9.8% | 6.7% |
| Age 60 to 64 | 8.3% | 7.9% | 6.3% |
| Age 65 to 74 | 16.2% | 9.0% | 9.6% |
| Age 75 to 84 | 7.0% | 4.4% | 4.5% |
| Age 85 and over | 2.0% | 2.3% | 1.9% |
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| Race | | | |
| | Kingwood, NJ | Mullica, NJ | United States |
| White | 89.5% | 86.8% | 59.4% |
| Black | 1.9% | 5.0% | 12.2% |
| Asian | 1.3% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.0% | 1.7% | 0.4% |
| Two or More Races | 4.0% | 1.1% | 3.2% |
| Hispanic | 2.3% | 5.4% | 18.4% |
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| Marriage & Family | | | |
| | Kingwood, NJ | Mullica, NJ | United States |
| Married Population | 65.8% | 53.0% | 49.8% |
| Currently Married | 65.2% | 49.5% | 48.0% |
| Married but Separated | 0.6% | 3.5% | 1.8% |
| Single Population | 34.2% | 47.0% | 50.2% |
| Never Married | 21.0% | 26.8% | 33.8% |
| Divorced | 7.5% | 14.3% | 10.8% |
| Widowed | 5.7% | 5.9% | 5.6% |
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| Household Size | 2.34 | 2.54 | 2.60 |
| Households | 1,624 | 2,262 | 124,010,992 |
| Family Households | 1,114 | 1,468 | 80,755,759 |
| Married couple, w/children | 29.4% | 34.6% | 30.5% |
| Married couple, no children | 67.5% | 43.3% | 42.9% |
| Non Family Households | 510 | 794 | 43,255,233 |
| Single householder, w/children | 0.0% | 16.1% | 15.8% |
| Single householder, no children | 3.1% | 6.0% | 10.8% |