| | Copiague, NY | Georgetown, DE | United States |
| Population | 23,552 | 7,079 | 329,725,481 |
| Female Population | 51.5% | 48.0% | 50.5% |
| Male Population | 48.5% | 52.0% | 49.5% |
| Median Age | 40.1 | 35.8 | 38.4 |
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| Population - 2010 | 20,620 | 6,458 | 309,327,143 |
| Population - 2000 | 21,922 | 4,643 | 285,036,114 |
| Population - 1990 | 20,769 | 3,732 | 251,960,433 |
| Pop. 2000 to Now | 3.3% | 67.9% | 15.6% |
| Pop. 1990 to Now | 9.1% | 108.9% | 30.8% |
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| Population Density | 7,617.1 | 1,377.0 | 93.4 |
| Land Area | 3.1 | 5.1 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Copiague, NY | Georgetown, DE | United States |
| Age 0 to 4 | 7.2% | 9.6% | 5.9% |
| Age 5 to 9 | 5.2% | 5.8% | 6.1% |
| Age 10 to 14 | 8.0% | 9.5% | 6.6% |
| Age 15 to 17 | 2.5% | 3.0% | 3.9% |
| Age 18 to 20 | 3.6% | 4.0% | 4.0% |
| Age 21 to 24 | 4.8% | 3.8% | 5.2% |
| Age 25 to 34 | 11.8% | 12.2% | 13.8% |
| Age 35 to 44 | 14.1% | 15.1% | 12.9% |
| Age 45 to 54 | 13.1% | 10.4% | 12.6% |
| Age 55 to 59 | 7.9% | 6.3% | 6.7% |
| Age 60 to 64 | 7.2% | 3.7% | 6.3% |
| Age 65 to 74 | 9.6% | 9.8% | 9.6% |
| Age 75 to 84 | 3.0% | 5.2% | 4.5% |
| Age 85 and over | 1.8% | 1.7% | 1.9% |
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| Race | | | |
| | Copiague, NY | Georgetown, DE | United States |
| White | 49.4% | 37.0% | 59.4% |
| Black | 4.9% | 15.5% | 12.2% |
| Asian | 2.5% | 5.3% | 5.6% |
| Native American | 1.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.9% | 0.6% | 0.4% |
| Two or More Races | 2.3% | 2.2% | 3.2% |
| Hispanic | 38.9% | 39.3% | 18.4% |
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| Marriage & Family | | | |
| | Copiague, NY | Georgetown, DE | United States |
| Married Population | 47.9% | 50.3% | 49.8% |
| Currently Married | 44.9% | 42.4% | 48.0% |
| Married but Separated | 3.1% | 7.9% | 1.8% |
| Single Population | 52.1% | 49.7% | 50.2% |
| Never Married | 37.3% | 32.5% | 33.8% |
| Divorced | 9.5% | 8.5% | 10.8% |
| Widowed | 5.3% | 8.7% | 5.6% |
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| Household Size | 3.34 | 2.66 | 2.60 |
| Households | 7,027 | 2,589 | 124,010,992 |
| Family Households | 5,203 | 1,566 | 80,755,759 |
| Married couple, w/children | 28.2% | 48.1% | 30.5% |
| Married couple, no children | 38.4% | 21.1% | 42.9% |
| Non Family Households | 1,824 | 1,023 | 43,255,233 |
| Single householder, w/children | 16.4% | 19.4% | 15.8% |
| Single householder, no children | 17.0% | 11.3% | 10.8% |