| | Port Washington, NY | Baltimore, MD | United States |
| Population | 16,807 | 592,211 | 329,725,481 |
| Female Population | 48.8% | 52.9% | 50.5% |
| Male Population | 51.2% | 47.1% | 49.5% |
| Median Age | 42.2 | 35.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 16,136 | 620,942 | 309,327,143 |
| Population - 2000 | 15,215 | 651,154 | 285,036,114 |
| Population - 1990 | 15,387 | 736,014 | 251,960,433 |
| Pop. 2000 to Now | 5.1% | -10.0% | 15.6% |
| Pop. 1990 to Now | 3.9% | -20.4% | 30.8% |
| space4 | | | |
| Population Density | 4,017.0 | 7,316.1 | 93.4 |
| Land Area | 4.2 | 80.9 | 3,531,905.4 |
| Water Area | 1.4 | 11.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Port Washington, NY | Baltimore, MD | United States |
| Age 0 to 4 | 6.8% | 6.2% | 5.9% |
| Age 5 to 9 | 8.5% | 5.5% | 6.1% |
| Age 10 to 14 | 7.4% | 5.7% | 6.6% |
| Age 15 to 17 | 4.2% | 3.1% | 3.9% |
| Age 18 to 20 | 2.4% | 4.3% | 4.0% |
| Age 21 to 24 | 2.8% | 5.1% | 5.2% |
| Age 25 to 34 | 8.2% | 18.8% | 13.8% |
| Age 35 to 44 | 13.2% | 13.0% | 12.9% |
| Age 45 to 54 | 14.0% | 11.4% | 12.6% |
| Age 55 to 59 | 5.5% | 6.4% | 6.7% |
| Age 60 to 64 | 6.8% | 6.4% | 6.3% |
| Age 65 to 74 | 10.5% | 8.7% | 9.6% |
| Age 75 to 84 | 5.4% | 3.8% | 4.5% |
| Age 85 and over | 4.4% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Port Washington, NY | Baltimore, MD | United States |
| White | 71.7% | 27.3% | 59.4% |
| Black | 1.3% | 60.9% | 12.2% |
| Asian | 11.7% | 2.5% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.4% | 0.4% |
| Two or More Races | 2.0% | 3.0% | 3.2% |
| Hispanic | 13.1% | 5.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Port Washington, NY | Baltimore, MD | United States |
| Married Population | 64.8% | 30.3% | 49.8% |
| Currently Married | 63.2% | 27.2% | 48.0% |
| Married but Separated | 1.6% | 3.1% | 1.8% |
| Single Population | 35.2% | 69.7% | 50.2% |
| Never Married | 23.5% | 52.3% | 33.8% |
| Divorced | 6.1% | 11.4% | 10.8% |
| Widowed | 5.7% | 6.0% | 5.6% |
| space5 | | | |
| Household Size | 2.89 | 2.32 | 2.60 |
| Households | 5,738 | 244,893 | 124,010,992 |
| Family Households | 4,473 | 119,410 | 80,755,759 |
| Married couple, w/children | 43.9% | 18.6% | 30.5% |
| Married couple, no children | 43.6% | 30.5% | 42.9% |
| Non Family Households | 1,265 | 125,483 | 43,255,233 |
| Single householder, w/children | 7.4% | 29.1% | 15.8% |
| Single householder, no children | 5.1% | 21.8% | 10.8% |