| Statistic | L'Île-Cadieux | Quebec | National |
| Population | 157 | 8,565,732 | 38,134,230 |
| Population density (sq km) | 246 | 6 | 4 |
| Median age | 58.8 | 42.6 | 40.9 |
| Male/Female ratio | 1.2:1 | 1.0:1 | 1.0:1 |
| Married couples | 67% | 50% | 66% |
| Families w/ kids at home | 27% | 40% | 43% |
| Speak English only | 17.4% | 4.7% | 68.8% |
| Speak French only | 10.4% | 49.5% | 4.5% |
| Data | Percent |
| N/A | 0.0% |
| Data | Percent |
| United Kingdom | 11.8% |
| Romania | 7.6% |
| Ethiopia | 5.6% |
| Russia | 3.5% |
| Lebanon | 0.7% |