| Statistic | Lachine | Montréal | Quebec |
| Population | 47,700 | 1,811,008 | 8,565,732 |
| Population density (sq km) | 2,646 | 4,984 | 6 |
| Median age | 41.7 | 38.7 | 42.6 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 48% | 54% | 50% |
| Families w/ kids at home | 41% | 41% | 40% |
| Speak English only | 12.1% | 10.2% | 4.7% |
| Speak French only | 24.9% | 29.8% | 49.5% |
| Data | Percent |
| Black | 13.9% |
| Chinese | 3.3% |
| Arab | 2.6% |
| Latin American | 2.6% |
| South Asian | 1.5% |
| Data | Percent |
| China | 2.2% |
| Philippines | 1.4% |
| Morocco | 1.3% |
| Other Caribbean And Bahamas | 1.2% |
| France | 1.0% |