| | Jennings, LA | Bayonne, NJ | United States |
| Population | 9,836 | 70,553 | 329,725,481 |
| Female Population | 52.2% | 50.9% | 50.5% |
| Male Population | 47.9% | 49.1% | 49.5% |
| Median Age | 36.5 | 38.4 | 38.4 |
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| Population - 2010 | 10,366 | 63,050 | 309,327,143 |
| Population - 2000 | 10,986 | 61,842 | 285,036,114 |
| Population - 1990 | 11,305 | 61,444 | 251,960,433 |
| Pop. 2000 to Now | -12.1% | 5.4% | 15.6% |
| Pop. 1990 to Now | -14.6% | 6.1% | 30.8% |
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| Population Density | 945.4 | 12,120.4 | 93.4 |
| Land Area | 10.4 | 5.8 | 3,531,905.4 |
| Water Area | 0.0 | 5.3 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Jennings, LA | Bayonne, NJ | United States |
| Age 0 to 4 | 8.1% | 7.0% | 5.9% |
| Age 5 to 9 | 7.0% | 6.8% | 6.1% |
| Age 10 to 14 | 7.9% | 5.5% | 6.6% |
| Age 15 to 17 | 5.0% | 3.5% | 3.9% |
| Age 18 to 20 | 2.6% | 2.4% | 4.0% |
| Age 21 to 24 | 3.2% | 4.8% | 5.2% |
| Age 25 to 34 | 11.9% | 14.8% | 13.8% |
| Age 35 to 44 | 13.9% | 14.5% | 12.9% |
| Age 45 to 54 | 8.9% | 12.4% | 12.6% |
| Age 55 to 59 | 6.7% | 7.2% | 6.7% |
| Age 60 to 64 | 5.3% | 6.8% | 6.3% |
| Age 65 to 74 | 10.8% | 8.6% | 9.6% |
| Age 75 to 84 | 5.9% | 4.1% | 4.5% |
| Age 85 and over | 2.8% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Jennings, LA | Bayonne, NJ | United States |
| White | 66.1% | 42.4% | 59.4% |
| Black | 22.7% | 8.6% | 12.2% |
| Asian | 0.0% | 10.1% | 5.6% |
| Native American | 1.4% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.3% | 0.4% |
| Two or More Races | 6.6% | 2.5% | 3.2% |
| Hispanic | 2.9% | 35.9% | 18.4% |
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| Marriage & Family | | | |
| | Jennings, LA | Bayonne, NJ | United States |
| Married Population | 47.6% | 49.9% | 49.8% |
| Currently Married | 43.8% | 47.3% | 48.0% |
| Married but Separated | 3.8% | 2.5% | 1.8% |
| Single Population | 52.4% | 50.1% | 50.2% |
| Never Married | 30.7% | 36.1% | 33.8% |
| Divorced | 11.2% | 8.6% | 10.8% |
| Widowed | 10.6% | 5.4% | 5.6% |
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| Household Size | 2.40 | 2.60 | 2.60 |
| Households | 3,951 | 27,036 | 124,010,992 |
| Family Households | 2,455 | 17,793 | 80,755,759 |
| Married couple, w/children | 36.2% | 31.4% | 30.5% |
| Married couple, no children | 32.7% | 35.2% | 42.9% |
| Non Family Households | 1,496 | 9,243 | 43,255,233 |
| Single householder, w/children | 25.5% | 17.7% | 15.8% |
| Single householder, no children | 5.6% | 15.7% | 10.8% |