| | Grand Isle, ME | Van Buren, ME | United States |
| Population | 419 | 1,793 | 329,725,481 |
| Female Population | 45.1% | 55.1% | 50.5% |
| Male Population | 54.9% | 45.0% | 49.5% |
| Median Age | 52.3 | 58.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 466 | 2,166 | 309,327,143 |
| Population - 2000 | 518 | 2,631 | 285,036,114 |
| Population - 1990 | 558 | 3,045 | 251,960,433 |
| Pop. 2000 to Now | -17.6% | -24.6% | 15.6% |
| Pop. 1990 to Now | -23.5% | -34.9% | 30.8% |
| space4 | | | |
| Population Density | 12.1 | 53.1 | 93.4 |
| Land Area | 34.6 | 33.8 | 3,531,905.4 |
| Water Area | 0.8 | 1.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Grand Isle, ME | Van Buren, ME | United States |
| Age 0 to 4 | 4.3% | 4.4% | 5.9% |
| Age 5 to 9 | 4.5% | 3.8% | 6.1% |
| Age 10 to 14 | 2.4% | 4.5% | 6.6% |
| Age 15 to 17 | 2.4% | 0.5% | 3.9% |
| Age 18 to 20 | 0.5% | 3.3% | 4.0% |
| Age 21 to 24 | 3.3% | 3.8% | 5.2% |
| Age 25 to 34 | 15.0% | 6.7% | 13.8% |
| Age 35 to 44 | 9.3% | 6.9% | 12.9% |
| Age 45 to 54 | 9.8% | 10.9% | 12.6% |
| Age 55 to 59 | 5.5% | 7.5% | 6.7% |
| Age 60 to 64 | 14.6% | 11.4% | 6.3% |
| Age 65 to 74 | 17.2% | 19.2% | 9.6% |
| Age 75 to 84 | 8.8% | 10.9% | 4.5% |
| Age 85 and over | 2.4% | 6.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Grand Isle, ME | Van Buren, ME | United States |
| White | 97.9% | 95.9% | 59.4% |
| Black | 0.0% | 1.7% | 12.2% |
| Asian | 0.0% | 1.7% | 5.6% |
| Native American | 1.2% | 0.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.0% | 0.0% | 3.2% |
| Hispanic | 0.0% | 0.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Grand Isle, ME | Van Buren, ME | United States |
| Married Population | 43.0% | 40.4% | 49.8% |
| Currently Married | 43.0% | 39.3% | 48.0% |
| Married but Separated | 0.0% | 1.1% | 1.8% |
| Single Population | 57.0% | 59.6% | 50.2% |
| Never Married | 31.2% | 30.5% | 33.8% |
| Divorced | 19.1% | 15.7% | 10.8% |
| Widowed | 6.7% | 13.4% | 5.6% |
| space5 | | | |
| Household Size | 2.08 | 2.11 | 2.60 |
| Households | 201 | 791 | 124,010,992 |
| Family Households | 96 | 347 | 80,755,759 |
| Married couple, w/children | 19.8% | 14.4% | 30.5% |
| Married couple, no children | 56.3% | 60.5% | 42.9% |
| Non Family Households | 105 | 444 | 43,255,233 |
| Single householder, w/children | 19.8% | 14.7% | 15.8% |
| Single householder, no children | 4.2% | 10.4% | 10.8% |