| | Long Neck, DE | Delaware City, DE | United States |
| Population | 3,022 | 1,885 | 329,725,481 |
| Female Population | 58.3% | 45.9% | 50.5% |
| Male Population | 41.7% | 54.1% | 49.5% |
| Median Age | 61.5 | 39 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,220 | 1,781 | 309,327,143 |
| Population - 2000 | 1,629 | 1,453 | 285,036,114 |
| Population - 1990 | 886 | 1,682 | 251,960,433 |
| Pop. 2000 to Now | 87.5% | 27.0% | 15.6% |
| Pop. 1990 to Now | 244.8% | 9.7% | 30.8% |
| space4 | | | |
| Population Density | 1,215.1 | 998.9 | 93.4 |
| Land Area | 2.5 | 1.9 | 3,531,905.4 |
| Water Area | 0.4 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Long Neck, DE | Delaware City, DE | United States |
| Age 0 to 4 | 1.9% | 4.0% | 5.9% |
| Age 5 to 9 | 2.0% | 9.1% | 6.1% |
| Age 10 to 14 | 4.4% | 7.8% | 6.6% |
| Age 15 to 17 | 3.9% | 2.7% | 3.9% |
| Age 18 to 20 | 0.4% | 5.0% | 4.0% |
| Age 21 to 24 | 1.0% | 2.6% | 5.2% |
| Age 25 to 34 | 7.0% | 12.6% | 13.8% |
| Age 35 to 44 | 8.7% | 18.5% | 12.9% |
| Age 45 to 54 | 5.8% | 7.2% | 12.6% |
| Age 55 to 59 | 11.8% | 6.7% | 6.7% |
| Age 60 to 64 | 13.7% | 4.5% | 6.3% |
| Age 65 to 74 | 28.4% | 14.6% | 9.6% |
| Age 75 to 84 | 10.1% | 2.2% | 4.5% |
| Age 85 and over | 1.0% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Long Neck, DE | Delaware City, DE | United States |
| White | 93.0% | 77.0% | 59.4% |
| Black | 2.7% | 11.5% | 12.2% |
| Asian | 0.3% | 0.0% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.2% | 4.0% | 3.2% |
| Hispanic | 1.7% | 7.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Long Neck, DE | Delaware City, DE | United States |
| Married Population | 64.6% | 50.2% | 49.8% |
| Currently Married | 63.2% | 45.9% | 48.0% |
| Married but Separated | 1.4% | 4.3% | 1.8% |
| Single Population | 35.4% | 49.8% | 50.2% |
| Never Married | 13.5% | 31.9% | 33.8% |
| Divorced | 12.3% | 13.5% | 10.8% |
| Widowed | 9.6% | 4.4% | 5.6% |
| space5 | | | |
| Household Size | 1.89 | 2.81 | 2.60 |
| Households | 1,596 | 654 | 124,010,992 |
| Family Households | 906 | 412 | 80,755,759 |
| Married couple, w/children | 16.4% | 30.6% | 30.5% |
| Married couple, no children | 72.8% | 34.5% | 42.9% |
| Non Family Households | 690 | 242 | 43,255,233 |
| Single householder, w/children | 4.4% | 24.8% | 15.8% |
| Single householder, no children | 6.3% | 10.2% | 10.8% |