| Statistic | Saint-Blaise-sur-Richelieu | Quebec | National |
| Population | 2,223 | 8,565,732 | 38,134,230 |
| Population density (sq km) | 30 | 6 | 4 |
| Median age | 44.9 | 42.6 | 40.9 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married couples | 46% | 50% | 66% |
| Families w/ kids at home | 42% | 40% | 43% |
| Speak English only | 0.5% | 4.7% | 68.8% |
| Speak French only | 62.8% | 49.5% | 4.5% |
| Data | Percent |
| Black | 1.1% |
| N/A | 0.0% |
| Data | Percent |
| France | 1.9% |
| Chile | 0.7% |
| Other Western Europe | 0.6% |
| Morocco | 0.5% |
| China | 0.5% |