| | Old Bridge township, NJ | Sayreville, NJ | United States |
| Population | 66,925 | 45,062 | 329,725,481 |
| Female Population | 50.7% | 49.9% | 50.5% |
| Male Population | 49.3% | 50.1% | 49.5% |
| Median Age | 42.8 | 39.9 | 38.4 |
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| Population - 2010 | 65,399 | 42,771 | 309,327,143 |
| Population - 2000 | 60,456 | 40,377 | 285,036,114 |
| Population - 1990 | 56,475 | 34,986 | 251,960,433 |
| Pop. 2000 to Now | 8.2% | 8.6% | 15.6% |
| Pop. 1990 to Now | 15.8% | 25.4% | 30.8% |
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| Population Density | 1,758.4 | 2,846.6 | 93.4 |
| Land Area | 38.1 | 15.8 | 3,531,905.4 |
| Water Area | 2.7 | 2.8 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Old Bridge township, NJ | Sayreville, NJ | United States |
| Age 0 to 4 | 4.5% | 5.7% | 5.9% |
| Age 5 to 9 | 5.5% | 5.5% | 6.1% |
| Age 10 to 14 | 5.6% | 5.9% | 6.6% |
| Age 15 to 17 | 4.1% | 3.3% | 3.9% |
| Age 18 to 20 | 2.9% | 3.2% | 4.0% |
| Age 21 to 24 | 3.7% | 3.5% | 5.2% |
| Age 25 to 34 | 13.1% | 16.2% | 13.8% |
| Age 35 to 44 | 13.3% | 13.9% | 12.9% |
| Age 45 to 54 | 14.4% | 14.4% | 12.6% |
| Age 55 to 59 | 9.1% | 7.2% | 6.7% |
| Age 60 to 64 | 6.8% | 6.7% | 6.3% |
| Age 65 to 74 | 10.3% | 9.3% | 9.6% |
| Age 75 to 84 | 4.7% | 3.7% | 4.5% |
| Age 85 and over | 1.9% | 1.4% | 1.9% |
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| Race | | | |
| | Old Bridge township, NJ | Sayreville, NJ | United States |
| White | 60.2% | 48.6% | 59.4% |
| Black | 6.8% | 11.5% | 12.2% |
| Asian | 15.0% | 17.7% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.8% | 0.4% |
| Two or More Races | 3.2% | 2.7% | 3.2% |
| Hispanic | 14.6% | 18.6% | 18.4% |
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| Marriage & Family | | | |
| | Old Bridge township, NJ | Sayreville, NJ | United States |
| Married Population | 56.3% | 53.2% | 49.8% |
| Currently Married | 54.9% | 51.8% | 48.0% |
| Married but Separated | 1.4% | 1.4% | 1.8% |
| Single Population | 43.7% | 46.8% | 50.2% |
| Never Married | 29.2% | 32.2% | 33.8% |
| Divorced | 8.0% | 9.3% | 10.8% |
| Widowed | 6.5% | 5.2% | 5.6% |
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| Household Size | 2.59 | 2.67 | 2.60 |
| Households | 25,661 | 16,878 | 124,010,992 |
| Family Households | 17,657 | 11,650 | 80,755,759 |
| Married couple, w/children | 33.7% | 34.5% | 30.5% |
| Married couple, no children | 47.6% | 38.7% | 42.9% |
| Non Family Households | 8,004 | 5,228 | 43,255,233 |
| Single householder, w/children | 8.0% | 11.2% | 15.8% |
| Single householder, no children | 10.7% | 15.6% | 10.8% |