| | Grand Isle, LA | Loreauville, LA | United States |
| Population | 858 | 854 | 329,725,481 |
| Female Population | 49.5% | 45.3% | 50.5% |
| Male Population | 50.5% | 54.7% | 49.5% |
| Median Age | 51.5 | 31.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,302 | 883 | 309,327,143 |
| Population - 2000 | 1,541 | 938 | 285,036,114 |
| Population - 1990 | 1,455 | 860 | 251,960,433 |
| Pop. 2000 to Now | -6.1% | -11.0% | 15.6% |
| Pop. 1990 to Now | -0.6% | -2.9% | 30.8% |
| space4 | | | |
| Population Density | 134.1 | 1,914.8 | 93.4 |
| Land Area | 6.4 | 0.4 | 3,531,905.4 |
| Water Area | 1.8 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Grand Isle, LA | Loreauville, LA | United States |
| Age 0 to 4 | 3.0% | 9.3% | 5.9% |
| Age 5 to 9 | 8.4% | 11.9% | 6.1% |
| Age 10 to 14 | 4.0% | 6.8% | 6.6% |
| Age 15 to 17 | 3.8% | 1.5% | 3.9% |
| Age 18 to 20 | 0.7% | 3.6% | 4.0% |
| Age 21 to 24 | 1.6% | 4.2% | 5.2% |
| Age 25 to 34 | 11.2% | 15.1% | 13.8% |
| Age 35 to 44 | 3.1% | 6.3% | 12.9% |
| Age 45 to 54 | 25.9% | 19.3% | 12.6% |
| Age 55 to 59 | 16.7% | 6.0% | 6.7% |
| Age 60 to 64 | 2.0% | 4.3% | 6.3% |
| Age 65 to 74 | 12.4% | 4.7% | 9.6% |
| Age 75 to 84 | 7.1% | 5.2% | 4.5% |
| Age 85 and over | 0.1% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Grand Isle, LA | Loreauville, LA | United States |
| White | 93.9% | 54.0% | 59.4% |
| Black | 0.9% | 43.4% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.2% | 2.6% | 3.2% |
| Hispanic | 2.9% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Grand Isle, LA | Loreauville, LA | United States |
| Married Population | 52.9% | 48.9% | 49.8% |
| Currently Married | 49.4% | 45.5% | 48.0% |
| Married but Separated | 3.4% | 3.4% | 1.8% |
| Single Population | 47.1% | 51.1% | 50.2% |
| Never Married | 20.9% | 38.4% | 33.8% |
| Divorced | 20.1% | 4.1% | 10.8% |
| Widowed | 6.1% | 8.6% | 5.6% |
| space5 | | | |
| Household Size | 2.02 | 2.99 | 2.60 |
| Households | 414 | 286 | 124,010,992 |
| Family Households | 244 | 199 | 80,755,759 |
| Married couple, w/children | 11.1% | 11.6% | 30.5% |
| Married couple, no children | 58.6% | 44.2% | 42.9% |
| Non Family Households | 170 | 87 | 43,255,233 |
| Single householder, w/children | 30.3% | 44.2% | 15.8% |
| Single householder, no children | 0.0% | 0.0% | 10.8% |