| | Chesapeake City, MD | Claymont, DE | United States |
| Population | 788 | 9,508 | 329,725,481 |
| Female Population | 51.3% | 48.4% | 50.5% |
| Male Population | 48.7% | 51.6% | 49.5% |
| Median Age | 56.6 | 36.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 689 | 7,511 | 309,327,143 |
| Population - 2000 | 787 | 9,220 | 285,036,114 |
| Population - 1990 | 735 | 9,800 | 251,960,433 |
| Pop. 2000 to Now | -11.7% | -4.3% | 15.6% |
| Pop. 1990 to Now | -5.4% | -9.9% | 30.8% |
| space4 | | | |
| Population Density | 1,486.8 | 4,422.3 | 93.4 |
| Land Area | 0.5 | 2.2 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Chesapeake City, MD | Claymont, DE | United States |
| Age 0 to 4 | 3.3% | 5.1% | 5.9% |
| Age 5 to 9 | 4.6% | 6.0% | 6.1% |
| Age 10 to 14 | 5.3% | 5.5% | 6.6% |
| Age 15 to 17 | 4.6% | 1.9% | 3.9% |
| Age 18 to 20 | 0.4% | 2.7% | 4.0% |
| Age 21 to 24 | 1.8% | 3.5% | 5.2% |
| Age 25 to 34 | 11.4% | 23.1% | 13.8% |
| Age 35 to 44 | 7.0% | 11.8% | 12.9% |
| Age 45 to 54 | 8.2% | 13.1% | 12.6% |
| Age 55 to 59 | 12.2% | 6.2% | 6.7% |
| Age 60 to 64 | 11.3% | 7.1% | 6.3% |
| Age 65 to 74 | 18.1% | 9.8% | 9.6% |
| Age 75 to 84 | 9.1% | 3.1% | 4.5% |
| Age 85 and over | 2.7% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Chesapeake City, MD | Claymont, DE | United States |
| White | 77.0% | 53.3% | 59.4% |
| Black | 1.7% | 28.4% | 12.2% |
| Asian | 0.0% | 6.1% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.1% | 3.2% | 3.2% |
| Hispanic | 17.3% | 8.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Chesapeake City, MD | Claymont, DE | United States |
| Married Population | 47.4% | 43.5% | 49.8% |
| Currently Married | 47.4% | 42.7% | 48.0% |
| Married but Separated | 0.0% | 0.8% | 1.8% |
| Single Population | 52.6% | 56.5% | 50.2% |
| Never Married | 24.6% | 39.2% | 33.8% |
| Divorced | 17.4% | 10.8% | 10.8% |
| Widowed | 10.7% | 6.5% | 5.6% |
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| Household Size | 1.98 | 2.32 | 2.60 |
| Households | 391 | 4,097 | 124,010,992 |
| Family Households | 225 | 2,094 | 80,755,759 |
| Married couple, w/children | 4.4% | 28.8% | 30.5% |
| Married couple, no children | 64.0% | 45.4% | 42.9% |
| Non Family Households | 166 | 2,003 | 43,255,233 |
| Single householder, w/children | 22.2% | 9.6% | 15.8% |
| Single householder, no children | 9.3% | 16.1% | 10.8% |