| | Wilmington, VT | Gilmanton, NH | United States |
| Population | 1,845 | 3,929 | 329,725,481 |
| Female Population | 46.7% | 49.2% | 50.5% |
| Male Population | 53.3% | 50.8% | 49.5% |
| Median Age | 56.1 | 44.5 | 38.4 |
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| Population - 2010 | 1,875 | 3,753 | 309,327,143 |
| Population - 2000 | 2,225 | 3,060 | 285,036,114 |
| Population - 1990 | 1,968 | 2,609 | 251,960,433 |
| Pop. 2000 to Now | -19.7% | 24.1% | 15.6% |
| Pop. 1990 to Now | -9.3% | 45.5% | 30.8% |
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| Population Density | 46.5 | 68.6 | 93.4 |
| Land Area | 39.7 | 57.2 | 3,531,905.4 |
| Water Area | 2.0 | 1.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Wilmington, VT | Gilmanton, NH | United States |
| Age 0 to 4 | 6.6% | 6.7% | 5.9% |
| Age 5 to 9 | 1.9% | 2.4% | 6.1% |
| Age 10 to 14 | 4.1% | 7.7% | 6.6% |
| Age 15 to 17 | 2.4% | 5.1% | 3.9% |
| Age 18 to 20 | 2.8% | 2.8% | 4.0% |
| Age 21 to 24 | 2.8% | 3.7% | 5.2% |
| Age 25 to 34 | 8.9% | 10.9% | 13.8% |
| Age 35 to 44 | 8.3% | 12.0% | 12.9% |
| Age 45 to 54 | 11.5% | 12.0% | 12.6% |
| Age 55 to 59 | 8.5% | 8.9% | 6.7% |
| Age 60 to 64 | 14.1% | 11.0% | 6.3% |
| Age 65 to 74 | 17.6% | 10.5% | 9.6% |
| Age 75 to 84 | 8.3% | 4.3% | 4.5% |
| Age 85 and over | 2.1% | 1.8% | 1.9% |
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| Race | | | |
| | Wilmington, VT | Gilmanton, NH | United States |
| White | 93.5% | 95.9% | 59.4% |
| Black | 0.0% | 2.0% | 12.2% |
| Asian | 1.4% | 0.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.7% | 0.0% | 0.4% |
| Two or More Races | 1.7% | 0.3% | 3.2% |
| Hispanic | 2.7% | 1.7% | 18.4% |
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| Marriage & Family | | | |
| | Wilmington, VT | Gilmanton, NH | United States |
| Married Population | 50.3% | 62.2% | 49.8% |
| Currently Married | 48.4% | 62.2% | 48.0% |
| Married but Separated | 1.9% | 0.0% | 1.8% |
| Single Population | 49.7% | 37.8% | 50.2% |
| Never Married | 23.7% | 22.6% | 33.8% |
| Divorced | 20.3% | 10.2% | 10.8% |
| Widowed | 5.7% | 5.0% | 5.6% |
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| Household Size | 2.11 | 2.63 | 2.60 |
| Households | 873 | 1,493 | 124,010,992 |
| Family Households | 435 | 1,049 | 80,755,759 |
| Married couple, w/children | 23.2% | 31.7% | 30.5% |
| Married couple, no children | 56.3% | 51.9% | 42.9% |
| Non Family Households | 438 | 444 | 43,255,233 |
| Single householder, w/children | 11.7% | 10.8% | 15.8% |
| Single householder, no children | 8.7% | 5.6% | 10.8% |