| | Killington, VT | Dover, VT | United States |
| Population | 851 | 1,130 | 329,725,481 |
| Female Population | 54.6% | 54.9% | 50.5% |
| Male Population | 45.4% | 45.1% | 49.5% |
| Median Age | 46.9 | 45.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 809 | 1,123 | 309,327,143 |
| Population - 2000 | 1,095 | 1,410 | 285,036,114 |
| Population - 1990 | 734 | 994 | 251,960,433 |
| Pop. 2000 to Now | -31.6% | -25.0% | 15.6% |
| Pop. 1990 to Now | 2.0% | 6.3% | 30.8% |
| space4 | | | |
| Population Density | 18.3 | 32.1 | 93.4 |
| Land Area | 46.6 | 35.2 | 3,531,905.4 |
| Water Area | 0.3 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Killington, VT | Dover, VT | United States |
| Age 0 to 4 | 4.6% | 2.6% | 5.9% |
| Age 5 to 9 | 7.8% | 6.4% | 6.1% |
| Age 10 to 14 | 9.6% | 7.6% | 6.6% |
| Age 15 to 17 | 2.0% | 3.0% | 3.9% |
| Age 18 to 20 | 2.7% | 1.9% | 4.0% |
| Age 21 to 24 | 1.3% | 1.7% | 5.2% |
| Age 25 to 34 | 9.3% | 12.8% | 13.8% |
| Age 35 to 44 | 12.1% | 9.9% | 12.9% |
| Age 45 to 54 | 11.6% | 13.2% | 12.6% |
| Age 55 to 59 | 12.2% | 4.3% | 6.7% |
| Age 60 to 64 | 6.0% | 10.7% | 6.3% |
| Age 65 to 74 | 10.6% | 20.4% | 9.6% |
| Age 75 to 84 | 8.3% | 4.4% | 4.5% |
| Age 85 and over | 1.9% | 1.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Killington, VT | Dover, VT | United States |
| White | 83.2% | 95.0% | 59.4% |
| Black | 0.1% | 0.9% | 12.2% |
| Asian | 5.4% | 1.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.0% | 0.4% |
| Two or More Races | 6.0% | 1.3% | 3.2% |
| Hispanic | 4.9% | 1.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Killington, VT | Dover, VT | United States |
| Married Population | 58.0% | 50.2% | 49.8% |
| Currently Married | 58.0% | 46.6% | 48.0% |
| Married but Separated | 0.0% | 3.6% | 1.8% |
| Single Population | 42.0% | 49.8% | 50.2% |
| Never Married | 29.7% | 27.8% | 33.8% |
| Divorced | 10.1% | 16.5% | 10.8% |
| Widowed | 2.3% | 5.5% | 5.6% |
| space5 | | | |
| Household Size | 2.24 | 1.98 | 2.60 |
| Households | 364 | 570 | 124,010,992 |
| Family Households | 197 | 336 | 80,755,759 |
| Married couple, w/children | 31.0% | 14.0% | 30.5% |
| Married couple, no children | 54.3% | 50.3% | 42.9% |
| Non Family Households | 167 | 234 | 43,255,233 |
| Single householder, w/children | 8.6% | 32.7% | 15.8% |
| Single householder, no children | 6.1% | 3.0% | 10.8% |