| | Andover, VT | Barnard, VT | United States |
| Population | 580 | 1,043 | 329,725,481 |
| Female Population | 53.5% | 42.7% | 50.5% |
| Male Population | 46.6% | 57.3% | 49.5% |
| Median Age | 47.2 | 46.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 467 | 949 | 309,327,143 |
| Population - 2000 | 496 | 958 | 285,036,114 |
| Population - 1990 | 373 | 872 | 251,960,433 |
| Pop. 2000 to Now | -4.8% | -3.0% | 15.6% |
| Pop. 1990 to Now | 26.5% | 6.5% | 30.8% |
| space4 | | | |
| Population Density | 20.2 | 21.4 | 93.4 |
| Land Area | 28.7 | 48.6 | 3,531,905.4 |
| Water Area | 0.1 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Andover, VT | Barnard, VT | United States |
| Age 0 to 4 | 2.8% | 4.2% | 5.9% |
| Age 5 to 9 | 2.4% | 5.7% | 6.1% |
| Age 10 to 14 | 7.9% | 9.3% | 6.6% |
| Age 15 to 17 | 1.9% | 3.9% | 3.9% |
| Age 18 to 20 | 4.0% | 0.7% | 4.0% |
| Age 21 to 24 | 2.2% | 3.3% | 5.2% |
| Age 25 to 34 | 17.8% | 11.9% | 13.8% |
| Age 35 to 44 | 9.1% | 9.8% | 12.9% |
| Age 45 to 54 | 17.1% | 15.5% | 12.6% |
| Age 55 to 59 | 5.3% | 9.8% | 6.7% |
| Age 60 to 64 | 9.0% | 8.5% | 6.3% |
| Age 65 to 74 | 13.8% | 11.2% | 9.6% |
| Age 75 to 84 | 4.5% | 1.9% | 4.5% |
| Age 85 and over | 2.2% | 4.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Andover, VT | Barnard, VT | United States |
| White | 99.5% | 97.3% | 59.4% |
| Black | 0.0% | 0.6% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 1.5% | 3.2% |
| Hispanic | 0.0% | 0.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Andover, VT | Barnard, VT | United States |
| Married Population | 60.3% | 60.7% | 49.8% |
| Currently Married | 59.7% | 58.2% | 48.0% |
| Married but Separated | 0.6% | 2.5% | 1.8% |
| Single Population | 39.7% | 39.3% | 50.2% |
| Never Married | 23.6% | 23.1% | 33.8% |
| Divorced | 12.7% | 9.8% | 10.8% |
| Widowed | 3.4% | 6.3% | 5.6% |
| space5 | | | |
| Household Size | 3.01 | 2.21 | 2.60 |
| Households | 193 | 472 | 124,010,992 |
| Family Households | 137 | 282 | 80,755,759 |
| Married couple, w/children | 24.8% | 34.0% | 30.5% |
| Married couple, no children | 62.8% | 55.0% | 42.9% |
| Non Family Households | 56 | 190 | 43,255,233 |
| Single householder, w/children | 2.9% | 7.4% | 15.8% |
| Single householder, no children | 9.5% | 3.5% | 10.8% |