| | South Bound Brook, NJ | Freehold township, NJ | United States |
| Population | 4,818 | 35,531 | 329,725,481 |
| Female Population | 49.4% | 52.0% | 50.5% |
| Male Population | 50.6% | 48.1% | 49.5% |
| Median Age | 35.7 | 42 | 38.4 |
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| Population - 2010 | 4,538 | 36,177 | 309,327,143 |
| Population - 2000 | 4,492 | 31,537 | 285,036,114 |
| Population - 1990 | 4,185 | 24,710 | 251,960,433 |
| Pop. 2000 to Now | 0.6% | 10.0% | 15.6% |
| Pop. 1990 to Now | 8.0% | 40.3% | 30.8% |
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| Population Density | 7,469.8 | 922.8 | 93.4 |
| Land Area | 0.6 | 38.5 | 3,531,905.4 |
| Water Area | 0.1 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | South Bound Brook, NJ | Freehold township, NJ | United States |
| Age 0 to 4 | 8.3% | 3.2% | 5.9% |
| Age 5 to 9 | 6.3% | 7.5% | 6.1% |
| Age 10 to 14 | 5.6% | 6.7% | 6.6% |
| Age 15 to 17 | 2.8% | 4.5% | 3.9% |
| Age 18 to 20 | 3.1% | 3.2% | 4.0% |
| Age 21 to 24 | 6.8% | 5.6% | 5.2% |
| Age 25 to 34 | 15.7% | 9.1% | 13.8% |
| Age 35 to 44 | 13.6% | 12.9% | 12.9% |
| Age 45 to 54 | 15.6% | 15.8% | 12.6% |
| Age 55 to 59 | 7.7% | 8.7% | 6.7% |
| Age 60 to 64 | 3.5% | 5.6% | 6.3% |
| Age 65 to 74 | 6.0% | 8.9% | 9.6% |
| Age 75 to 84 | 3.5% | 5.8% | 4.5% |
| Age 85 and over | 1.5% | 2.4% | 1.9% |
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| Race | | | |
| | South Bound Brook, NJ | Freehold township, NJ | United States |
| White | 40.9% | 73.1% | 59.4% |
| Black | 15.2% | 4.7% | 12.2% |
| Asian | 5.8% | 7.8% | 5.6% |
| Native American | 0.5% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.1% | 0.4% |
| Two or More Races | 3.6% | 2.8% | 3.2% |
| Hispanic | 33.7% | 11.5% | 18.4% |
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| Marriage & Family | | | |
| | South Bound Brook, NJ | Freehold township, NJ | United States |
| Married Population | 52.7% | 57.6% | 49.8% |
| Currently Married | 50.0% | 56.7% | 48.0% |
| Married but Separated | 2.7% | 0.9% | 1.8% |
| Single Population | 47.3% | 42.4% | 50.2% |
| Never Married | 33.7% | 28.4% | 33.8% |
| Divorced | 8.6% | 7.6% | 10.8% |
| Widowed | 5.0% | 6.3% | 5.6% |
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| Household Size | 2.69 | 2.71 | 2.60 |
| Households | 1,778 | 12,778 | 124,010,992 |
| Family Households | 1,217 | 9,120 | 80,755,759 |
| Married couple, w/children | 30.7% | 39.4% | 30.5% |
| Married couple, no children | 39.0% | 47.8% | 42.9% |
| Non Family Households | 561 | 3,658 | 43,255,233 |
| Single householder, w/children | 10.0% | 7.1% | 15.8% |
| Single householder, no children | 20.2% | 5.6% | 10.8% |