| Statistic | Vieux Saint - Jean | Saint-Jean-sur-Richelieu | Quebec |
| Population | 6,232 | 99,027 | 8,565,732 |
| Population density (sq km) | 4,234 | 430 | 6 |
| Median age | 44.9 | 43.2 | 42.6 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 24% | 43% | 50% |
| Families w/ kids at home | 26% | 40% | 40% |
| Speak English only | 0.4% | 0.5% | 4.7% |
| Speak French only | 60.9% | 57.8% | 49.5% |
| Data | Percent |
| Black | 0.6% |
| Latin American | 0.4% |
| Arab | 0.3% |
| Southeast Asian | 0.2% |
| All Other Visible Minorities | 0.1% |
| Data | Percent |
| France | 0.6% |
| Morocco | 0.3% |
| Portugal | 0.3% |
| Chile | 0.2% |
| Other Central Africa | 0.2% |