| Statistic | St. Laurent | Sorel-Tracy | Quebec |
| Population | 4,834 | 34,850 | 8,565,732 |
| Population density (sq km) | 1,053 | 608 | 6 |
| Median age | 52.1 | 53.2 | 42.6 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married couples | 44% | 49% | 50% |
| Families w/ kids at home | 26% | 31% | 40% |
| Speak English only | 0.4% | 0.2% | 4.7% |
| Speak French only | 72.9% | 73.1% | 49.5% |
| Data | Percent |
| Latin American | 0.4% |
| Filipino | 0.3% |
| Chinese | 0.2% |
| Black | 0.2% |
| Multiple Visible Minorities | 0.0% |
| Data | Percent |
| France | 0.3% |
| Mexico | 0.3% |
| Taiwan | 0.3% |
| United States | 0.2% |
| Other Western Europe | 0.1% |