| | Smithville, NJ | Brigantine, NJ | United States |
| Population | 9,127 | 7,890 | 329,725,481 |
| Female Population | 53.7% | 56.4% | 50.5% |
| Male Population | 46.3% | 43.6% | 49.5% |
| Median Age | 53.2 | 57.3 | 38.4 |
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| Population - 2010 | 6,045 | 9,446 | 309,327,143 |
| Population - 2000 | 5,732 | 12,594 | 285,036,114 |
| Population - 1990 | 4,139 | 11,354 | 251,960,433 |
| Pop. 2000 to Now | 24.6% | -31.9% | 15.6% |
| Pop. 1990 to Now | 72.6% | -24.5% | 30.8% |
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| Population Density | 1,817.8 | 1,209.9 | 93.4 |
| Land Area | 5.0 | 6.5 | 3,531,905.4 |
| Water Area | 0.1 | 4.3 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Smithville, NJ | Brigantine, NJ | United States |
| Age 0 to 4 | 1.5% | 2.4% | 5.9% |
| Age 5 to 9 | 3.6% | 2.6% | 6.1% |
| Age 10 to 14 | 3.4% | 3.1% | 6.6% |
| Age 15 to 17 | 2.3% | 1.7% | 3.9% |
| Age 18 to 20 | 4.1% | 2.2% | 4.0% |
| Age 21 to 24 | 2.3% | 3.6% | 5.2% |
| Age 25 to 34 | 17.8% | 10.4% | 13.8% |
| Age 35 to 44 | 5.8% | 7.4% | 12.9% |
| Age 45 to 54 | 11.7% | 12.7% | 12.6% |
| Age 55 to 59 | 9.5% | 12.4% | 6.7% |
| Age 60 to 64 | 8.2% | 10.8% | 6.3% |
| Age 65 to 74 | 15.1% | 18.0% | 9.6% |
| Age 75 to 84 | 10.8% | 10.1% | 4.5% |
| Age 85 and over | 3.9% | 2.8% | 1.9% |
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| Race | | | |
| | Smithville, NJ | Brigantine, NJ | United States |
| White | 64.1% | 85.0% | 59.4% |
| Black | 16.1% | 0.5% | 12.2% |
| Asian | 5.3% | 6.0% | 5.6% |
| Native American | 0.5% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.6% | 0.4% |
| Two or More Races | 5.4% | 0.9% | 3.2% |
| Hispanic | 8.6% | 6.9% | 18.4% |
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| Marriage & Family | | | |
| | Smithville, NJ | Brigantine, NJ | United States |
| Married Population | 45.3% | 50.5% | 49.8% |
| Currently Married | 44.3% | 49.7% | 48.0% |
| Married but Separated | 1.0% | 0.8% | 1.8% |
| Single Population | 54.7% | 49.5% | 50.2% |
| Never Married | 33.2% | 27.6% | 33.8% |
| Divorced | 13.5% | 15.2% | 10.8% |
| Widowed | 8.0% | 6.7% | 5.6% |
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| Household Size | 1.98 | 2.09 | 2.60 |
| Households | 4,608 | 3,769 | 124,010,992 |
| Family Households | 2,394 | 2,173 | 80,755,759 |
| Married couple, w/children | 12.5% | 16.4% | 30.5% |
| Married couple, no children | 61.2% | 61.9% | 42.9% |
| Non Family Households | 2,214 | 1,596 | 43,255,233 |
| Single householder, w/children | 10.7% | 7.5% | 15.8% |
| Single householder, no children | 15.6% | 14.2% | 10.8% |