| | Blackwood, NJ | Ocean City, MD | United States |
| Population | 4,477 | 6,869 | 329,725,481 |
| Female Population | 51.5% | 54.5% | 50.5% |
| Male Population | 48.5% | 45.5% | 49.5% |
| Median Age | 39 | 56.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,026 | 7,105 | 309,327,143 |
| Population - 2000 | 4,692 | 7,173 | 285,036,114 |
| Population - 1990 | 5,120 | 5,146 | 251,960,433 |
| Pop. 2000 to Now | 1.9% | -3.6% | 15.6% |
| Pop. 1990 to Now | -6.6% | 34.3% | 30.8% |
| space4 | | | |
| Population Density | 3,669.7 | 1,555.5 | 93.4 |
| Land Area | 1.2 | 4.4 | 3,531,905.4 |
| Water Area | 0.0 | 5.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Blackwood, NJ | Ocean City, MD | United States |
| Age 0 to 4 | 5.6% | 2.6% | 5.9% |
| Age 5 to 9 | 6.5% | 2.2% | 6.1% |
| Age 10 to 14 | 5.3% | 1.5% | 6.6% |
| Age 15 to 17 | 4.5% | 1.0% | 3.9% |
| Age 18 to 20 | 2.3% | 3.3% | 4.0% |
| Age 21 to 24 | 3.8% | 8.2% | 5.2% |
| Age 25 to 34 | 16.1% | 11.9% | 13.8% |
| Age 35 to 44 | 10.3% | 6.0% | 12.9% |
| Age 45 to 54 | 13.4% | 10.5% | 12.6% |
| Age 55 to 59 | 9.2% | 7.5% | 6.7% |
| Age 60 to 64 | 6.7% | 9.1% | 6.3% |
| Age 65 to 74 | 10.1% | 22.7% | 9.6% |
| Age 75 to 84 | 4.6% | 8.8% | 4.5% |
| Age 85 and over | 1.5% | 4.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Blackwood, NJ | Ocean City, MD | United States |
| White | 79.7% | 90.0% | 59.4% |
| Black | 4.8% | 0.4% | 12.2% |
| Asian | 1.9% | 0.8% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 1.5% | 2.2% | 3.2% |
| Hispanic | 12.0% | 5.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Blackwood, NJ | Ocean City, MD | United States |
| Married Population | 53.8% | 50.3% | 49.8% |
| Currently Married | 51.5% | 43.9% | 48.0% |
| Married but Separated | 2.2% | 6.5% | 1.8% |
| Single Population | 46.2% | 49.7% | 50.2% |
| Never Married | 30.3% | 28.6% | 33.8% |
| Divorced | 10.2% | 14.9% | 10.8% |
| Widowed | 5.7% | 6.1% | 5.6% |
| space5 | | | |
| Household Size | 2.75 | 1.82 | 2.60 |
| Households | 1,628 | 3,723 | 124,010,992 |
| Family Households | 1,152 | 1,780 | 80,755,759 |
| Married couple, w/children | 29.7% | 10.1% | 30.5% |
| Married couple, no children | 44.4% | 65.7% | 42.9% |
| Non Family Households | 476 | 1,943 | 43,255,233 |
| Single householder, w/children | 14.1% | 4.0% | 15.8% |
| Single householder, no children | 11.7% | 20.2% | 10.8% |