| | New Brunswick, NJ | Rosedale, MD | United States |
| Population | 55,671 | 20,296 | 329,725,481 |
| Female Population | 49.5% | 50.5% | 50.5% |
| Male Population | 50.5% | 49.5% | 49.5% |
| Median Age | 23.7 | 40.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 54,886 | 19,044 | 309,327,143 |
| Population - 2000 | 48,573 | 19,199 | 285,036,114 |
| Population - 1990 | 41,711 | 18,703 | 251,960,433 |
| Pop. 2000 to Now | 15.7% | -0.5% | 15.6% |
| Pop. 1990 to Now | 34.7% | 2.2% | 30.8% |
| space4 | | | |
| Population Density | 10,638.5 | 2,944.4 | 93.4 |
| Land Area | 5.2 | 6.9 | 3,531,905.4 |
| Water Area | 0.5 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | New Brunswick, NJ | Rosedale, MD | United States |
| Age 0 to 4 | 5.2% | 6.6% | 5.9% |
| Age 5 to 9 | 7.1% | 5.2% | 6.1% |
| Age 10 to 14 | 6.2% | 6.1% | 6.6% |
| Age 15 to 17 | 3.6% | 3.9% | 3.9% |
| Age 18 to 20 | 17.2% | 2.5% | 4.0% |
| Age 21 to 24 | 12.6% | 4.7% | 5.2% |
| Age 25 to 34 | 13.9% | 13.3% | 13.8% |
| Age 35 to 44 | 12.6% | 13.9% | 12.9% |
| Age 45 to 54 | 8.4% | 11.1% | 12.6% |
| Age 55 to 59 | 3.5% | 6.3% | 6.7% |
| Age 60 to 64 | 3.2% | 8.5% | 6.3% |
| Age 65 to 74 | 3.7% | 11.6% | 9.6% |
| Age 75 to 84 | 1.8% | 4.3% | 4.5% |
| Age 85 and over | 0.9% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | New Brunswick, NJ | Rosedale, MD | United States |
| White | 27.0% | 44.8% | 59.4% |
| Black | 14.1% | 41.3% | 12.2% |
| Asian | 10.0% | 4.9% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 1.2% | 0.5% | 0.4% |
| Two or More Races | 1.5% | 2.7% | 3.2% |
| Hispanic | 46.1% | 5.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | New Brunswick, NJ | Rosedale, MD | United States |
| Married Population | 25.3% | 47.3% | 49.8% |
| Currently Married | 23.2% | 45.2% | 48.0% |
| Married but Separated | 2.1% | 2.1% | 1.8% |
| Single Population | 74.7% | 52.7% | 50.2% |
| Never Married | 66.2% | 35.1% | 33.8% |
| Divorced | 5.9% | 10.2% | 10.8% |
| Widowed | 2.6% | 7.4% | 5.6% |
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| Household Size | 3.03 | 2.75 | 2.60 |
| Households | 15,464 | 7,362 | 124,010,992 |
| Family Households | 8,780 | 5,351 | 80,755,759 |
| Married couple, w/children | 26.2% | 25.1% | 30.5% |
| Married couple, no children | 21.2% | 37.8% | 42.9% |
| Non Family Households | 6,684 | 2,011 | 43,255,233 |
| Single householder, w/children | 37.5% | 19.6% | 15.8% |
| Single householder, no children | 15.1% | 17.6% | 10.8% |