| | Harman, WV | Cocoa, FL | United States |
| Population | 110 | 18,891 | 329,725,481 |
| Female Population | 45.5% | 52.7% | 50.5% |
| Male Population | 54.6% | 47.3% | 49.5% |
| Median Age | 58 | 43.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 142 | 17,176 | 309,327,143 |
| Population - 2000 | 126 | 16,412 | 285,036,114 |
| Population - 1990 | 128 | 17,722 | 251,960,433 |
| Pop. 2000 to Now | 8.7% | 13.9% | 15.6% |
| Pop. 1990 to Now | 7.0% | 5.5% | 30.8% |
| space4 | | | |
| Population Density | 340.6 | 1,416.2 | 93.4 |
| Land Area | 0.3 | 13.3 | 3,531,905.4 |
| Water Area | 0.0 | 2.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Harman, WV | Cocoa, FL | United States |
| Age 0 to 4 | 0.0% | 6.0% | 5.9% |
| Age 5 to 9 | 7.3% | 7.5% | 6.1% |
| Age 10 to 14 | 0.0% | 6.2% | 6.6% |
| Age 15 to 17 | 5.5% | 2.1% | 3.9% |
| Age 18 to 20 | 5.5% | 2.4% | 4.0% |
| Age 21 to 24 | 0.0% | 3.6% | 5.2% |
| Age 25 to 34 | 11.8% | 12.7% | 13.8% |
| Age 35 to 44 | 0.0% | 10.9% | 12.9% |
| Age 45 to 54 | 16.4% | 12.8% | 12.6% |
| Age 55 to 59 | 6.4% | 7.6% | 6.7% |
| Age 60 to 64 | 20.9% | 8.2% | 6.3% |
| Age 65 to 74 | 20.9% | 11.9% | 9.6% |
| Age 75 to 84 | 5.5% | 6.4% | 4.5% |
| Age 85 and over | 0.0% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Harman, WV | Cocoa, FL | United States |
| White | 100.0% | 48.7% | 59.4% |
| Black | 0.0% | 28.6% | 12.2% |
| Asian | 0.0% | 1.6% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 0.0% | 5.6% | 3.2% |
| Hispanic | 0.0% | 15.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Harman, WV | Cocoa, FL | United States |
| Married Population | 35.3% | 40.4% | 49.8% |
| Currently Married | 29.4% | 37.3% | 48.0% |
| Married but Separated | 5.9% | 3.1% | 1.8% |
| Single Population | 64.7% | 59.6% | 50.2% |
| Never Married | 35.3% | 33.1% | 33.8% |
| Divorced | 13.7% | 19.1% | 10.8% |
| Widowed | 15.7% | 7.4% | 5.6% |
| space5 | | | |
| Household Size | 1.77 | 2.40 | 2.60 |
| Households | 62 | 7,877 | 124,010,992 |
| Family Households | 22 | 4,059 | 80,755,759 |
| Married couple, w/children | 0.0% | 16.2% | 30.5% |
| Married couple, no children | 59.1% | 48.3% | 42.9% |
| Non Family Households | 40 | 3,818 | 43,255,233 |
| Single householder, w/children | 27.3% | 25.7% | 15.8% |
| Single householder, no children | 13.6% | 9.8% | 10.8% |