| Statistic | Grande-Île | Salaberry-de-Valleyfield | Quebec |
| Population | 5,241 | 42,121 | 8,565,732 |
| Population density (sq km) | 510 | 383 | 6 |
| Median age | 46.5 | 48.3 | 42.6 |
| Male/Female ratio | 0.9:1 | 1.1:1 | 1.0:1 |
| Married couples | 47% | 44% | 50% |
| Families w/ kids at home | 40% | 34% | 40% |
| Speak English only | 0.2% | 0.4% | 4.7% |
| Speak French only | 62.1% | 63.0% | 49.5% |
| Data | Percent |
| All Other Visible Minorities | 0.3% |
| Black | 0.2% |
| Arab | 0.2% |
| Latin American | 0.1% |
| West Asian | 0.0% |
| Data | Percent |
| France | 0.4% |
| Other South America | 0.2% |
| Algeria | 0.2% |
| Tunisia | 0.2% |
| Other Southern Europe | 0.2% |