Grand Isle is a town located in Jefferson Parish, Louisiana. Grand Isle has a 2026 population of 984. Grand Isle is currently declining at a rate of -0.3% annually and its population has decreased by -2.09% since the most recent census, which recorded a population of 1,005 in 2020.
The median age in Grand Isle is 58.4 years: 57.5 years for males, and 64.5 years for females. For every 100 females there are 176.9 males.
Data after 2023 is projected based on recent change
Overall: 58.4 years
Female: 64.5 years
Male: 57.5 years
There are 623 adults, (217 of whom are seniors) in Grand Isle.
Female: 225 (36.1%)
Male: 398 (63.9%)
The racial composition of Grand Isle includes 94.7% White, and smaller percentages for Black or African American, other race and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 590 | 94.7% |
| Two or more races | 23 | 3.69% |
| Black or African American | 5 | 0.8% |
| Other race | 5 | 0.8% |