| | Glasgow, DE | Copenhagen, NY | United States |
| Population | 15,342 | 741 | 329,725,481 |
| Female Population | 52.4% | 45.8% | 50.5% |
| Male Population | 47.6% | 54.3% | 49.5% |
| Median Age | 41.4 | 32.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 15,648 | 799 | 309,327,143 |
| Population - 2000 | 12,840 | 865 | 285,036,114 |
| Population - 1990 | 7,109 | 876 | 251,960,433 |
| Pop. 2000 to Now | 20.6% | -11.3% | 15.6% |
| Pop. 1990 to Now | 117.9% | -12.4% | 30.8% |
| space4 | | | |
| Population Density | 1,545.8 | 630.1 | 93.4 |
| Land Area | 9.9 | 1.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Glasgow, DE | Copenhagen, NY | United States |
| Age 0 to 4 | 6.3% | 5.3% | 5.9% |
| Age 5 to 9 | 4.8% | 6.7% | 6.1% |
| Age 10 to 14 | 5.3% | 5.8% | 6.6% |
| Age 15 to 17 | 4.0% | 4.3% | 3.9% |
| Age 18 to 20 | 3.1% | 3.0% | 4.0% |
| Age 21 to 24 | 3.2% | 7.3% | 5.2% |
| Age 25 to 34 | 14.1% | 19.0% | 13.8% |
| Age 35 to 44 | 13.3% | 5.8% | 12.9% |
| Age 45 to 54 | 17.6% | 18.5% | 12.6% |
| Age 55 to 59 | 10.8% | 8.2% | 6.7% |
| Age 60 to 64 | 6.1% | 4.3% | 6.3% |
| Age 65 to 74 | 7.4% | 7.8% | 9.6% |
| Age 75 to 84 | 3.3% | 2.6% | 4.5% |
| Age 85 and over | 0.5% | 1.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Glasgow, DE | Copenhagen, NY | United States |
| White | 59.3% | 86.5% | 59.4% |
| Black | 24.2% | 1.8% | 12.2% |
| Asian | 8.2% | 2.3% | 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 | 3.7% | 7.2% | 3.2% |
| Hispanic | 4.6% | 2.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Glasgow, DE | Copenhagen, NY | United States |
| Married Population | 56.0% | 52.1% | 49.8% |
| Currently Married | 55.5% | 49.1% | 48.0% |
| Married but Separated | 0.5% | 3.0% | 1.8% |
| Single Population | 44.0% | 47.9% | 50.2% |
| Never Married | 33.2% | 34.6% | 33.8% |
| Divorced | 9.2% | 8.7% | 10.8% |
| Widowed | 1.5% | 4.6% | 5.6% |
| space5 | | | |
| Household Size | 2.84 | 2.36 | 2.60 |
| Households | 5,404 | 314 | 124,010,992 |
| Family Households | 3,738 | 186 | 80,755,759 |
| Married couple, w/children | 33.2% | 32.3% | 30.5% |
| Married couple, no children | 48.6% | 46.8% | 42.9% |
| Non Family Households | 1,666 | 128 | 43,255,233 |
| Single householder, w/children | 10.6% | 11.3% | 15.8% |
| Single householder, no children | 7.6% | 9.7% | 10.8% |