| Statistic | L'Île-Cadieux | Montréal | Quebec |
| Population | 144 | 1,811,008 | 8,565,732 |
| Population density (sq km) | 213 | 4,984 | 6 |
| Median age | 58.8 | 38.7 | 42.6 |
| Male/Female ratio | 1.2:1 | 1.0:1 | 1.0:1 |
| Married couples | 67% | 54% | 50% |
| Families w/ kids at home | 27% | 41% | 40% |
| Speak English only | 17.4% | 10.2% | 4.7% |
| Speak French only | 10.4% | 29.8% | 49.5% |
| Data | Percent |
| N/A | 0.0% |
| Data | Percent |
| United Kingdom | 11.8% |
| Romania | 7.6% |
| Ethiopia | 5.6% |
| Russia | 3.5% |
| Lebanon | 0.7% |