| Statistic | Île Mercier | Montréal | Quebec |
| Population | 94 | 1,811,008 | 8,565,732 |
| Population density (sq km) | 1,663 | 4,984 | 6 |
| Median age | 48.3 | 38.7 | 42.6 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married couples | 61% | 54% | 50% |
| Families w/ kids at home | 32% | 41% | 40% |
| Speak English only | 8.5% | 10.2% | 4.7% |
| Speak French only | 20.2% | 29.8% | 49.5% |
| Data | Percent |
| South Asian | 8.5% |
| Black | 7.5% |
| Latin American | 2.1% |
| N/A | 0.0% |
| Data | Percent |
| Romania | 4.3% |
| France | 3.2% |
| Algeria | 3.2% |
| Lebanon | 3.2% |
| United Kingdom | 3.2% |