| Grand Isle - Population Change | FIPS Code=13010 |
| Absolute Population Change, 1970-1980 | 429 |
| Per Cent Population Change, 1970-1980 | 53.03 |
| Absolute Population Change, 1980-1990 | 404 |
| Per Cent Population Change, 1980-1990 | 32.63 |
| Population Estimate, 1996 | 1888 |
| Population Estimate, 2000 | 2088 |
| Population Estimate, 2005 | 2314 |
| Population Estimate, 2010 | 2552 |
| Population Estimate, 2015 | 2773 |
| Absolute Population Change, 1990-1996 | 246 |
| Per Cent Population Change, 1990-1996 | 14.98 |
| Absolute Population Change, 1996-2005 | 426 |
| Per Cent Population Change, 1996-2005 | 22.56 |
| Absolute Population Change, 2005-2015 | 459 |
| Per Cent Population Change, 2005-2015 | 19.84 |