| | Leonardo, NJ | Charlottesville, VA | United States |
| Population | 2,376 | 46,597 | 329,725,481 |
| Female Population | 48.1% | 51.8% | 50.5% |
| Male Population | 51.9% | 48.2% | 49.5% |
| Median Age | 39.2 | 32.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,756 | 43,467 | 309,327,143 |
| Population - 2000 | 2,823 | 45,049 | 285,036,114 |
| Population - 1990 | 3,788 | 40,341 | 251,960,433 |
| Pop. 2000 to Now | -11.2% | 4.2% | 15.6% |
| Pop. 1990 to Now | -33.8% | 16.4% | 30.8% |
| space4 | | | |
| Population Density | 4,000.0 | 4,548.3 | 93.4 |
| Land Area | 0.6 | 10.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Leonardo, NJ | Charlottesville, VA | United States |
| Age 0 to 4 | 4.1% | 5.3% | 5.9% |
| Age 5 to 9 | 2.8% | 4.7% | 6.1% |
| Age 10 to 14 | 7.9% | 3.8% | 6.6% |
| Age 15 to 17 | 6.0% | 1.9% | 3.9% |
| Age 18 to 20 | 5.2% | 8.8% | 4.0% |
| Age 21 to 24 | 2.5% | 11.0% | 5.2% |
| Age 25 to 34 | 15.5% | 19.2% | 13.8% |
| Age 35 to 44 | 12.0% | 12.7% | 12.9% |
| Age 45 to 54 | 14.9% | 10.3% | 12.6% |
| Age 55 to 59 | 5.6% | 6.0% | 6.7% |
| Age 60 to 64 | 8.5% | 4.4% | 6.3% |
| Age 65 to 74 | 12.2% | 7.8% | 9.6% |
| Age 75 to 84 | 2.4% | 2.9% | 4.5% |
| Age 85 and over | 0.4% | 1.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Leonardo, NJ | Charlottesville, VA | United States |
| White | 93.3% | 65.4% | 59.4% |
| Black | 0.0% | 17.9% | 12.2% |
| Asian | 4.3% | 7.0% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.5% | 0.4% |
| Two or More Races | 0.0% | 3.3% | 3.2% |
| Hispanic | 2.4% | 5.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Leonardo, NJ | Charlottesville, VA | United States |
| Married Population | 51.9% | 34.3% | 49.8% |
| Currently Married | 51.4% | 33.1% | 48.0% |
| Married but Separated | 0.4% | 1.2% | 1.8% |
| Single Population | 48.1% | 65.7% | 50.2% |
| Never Married | 34.1% | 51.3% | 33.8% |
| Divorced | 8.5% | 10.7% | 10.8% |
| Widowed | 5.6% | 3.7% | 5.6% |
| space5 | | | |
| Household Size | 2.49 | 2.28 | 2.60 |
| Households | 954 | 19,312 | 124,010,992 |
| Family Households | 649 | 8,731 | 80,755,759 |
| Married couple, w/children | 30.4% | 29.2% | 30.5% |
| Married couple, no children | 45.1% | 39.3% | 42.9% |
| Non Family Households | 305 | 10,581 | 43,255,233 |
| Single householder, w/children | 12.3% | 19.5% | 15.8% |
| Single householder, no children | 12.2% | 12.0% | 10.8% |