| Statistic | Saint-Louis | Montréal | Quebec |
| Population | 15,413 | 1,811,008 | 8,565,732 |
| Population density (sq km) | 12,393 | 4,984 | 6 |
| Median age | 33.8 | 38.7 | 42.6 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married couples | 40% | 54% | 50% |
| Families w/ kids at home | 30% | 41% | 40% |
| Speak English only | 12.9% | 10.2% | 4.7% |
| Speak French only | 15.5% | 29.8% | 49.5% |
| Data | Percent |
| Black | 4.8% |
| Arab | 3.3% |
| Chinese | 3.2% |
| Latin American | 3.1% |
| South Asian | 2.5% |
| Data | Percent |
| France | 6.0% |
| Portugal | 3.4% |
| United States | 1.5% |
| Iran | 1.2% |
| China | 0.8% |
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