| Statistic | Lachine-Ouest | Montréal | Quebec |
| Population | 14,691 | 1,811,008 | 8,565,732 |
| Population density (sq km) | 4,800 | 4,984 | 6 |
| Median age | 43.6 | 38.7 | 42.6 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 55% | 54% | 50% |
| Families w/ kids at home | 47% | 41% | 40% |
| Speak English only | 11.2% | 10.2% | 4.7% |
| Speak French only | 16.8% | 29.8% | 49.5% |
| Data | Percent |
| Black | 7.5% |
| Chinese | 3.0% |
| Latin American | 1.7% |
| Arab | 1.2% |
| Southeast Asian | 0.8% |
| Data | Percent |
| China | 2.1% |
| France | 1.4% |
| Romania | 1.1% |
| Italy | 1.0% |
| Philippines | 0.9% |