| Statistic | Sainte-Catherine | Trois-Rivières | Quebec |
| Population | 1,262 | 138,766 | 8,565,732 |
| Population density (sq km) | 1,429 | 478 | 6 |
| Median age | 49.2 | 46.6 | 42.6 |
| Male/Female ratio | 1.1:1 | 1.1:1 | 1.0:1 |
| Married couples | 30% | 43% | 50% |
| Families w/ kids at home | 20% | 34% | 40% |
| Speak English only | 0.1% | 0.2% | 4.7% |
| Speak French only | 69.5% | 68.3% | 49.5% |
| Data | Percent |
| Black | 3.7% |
| South Asian | 1.2% |
| Arab | 0.6% |
| Chinese | 0.4% |
| Latin American | 0.1% |
| Data | Percent |
| Morocco | 2.1% |
| Algeria | 1.3% |
| Colombia | 0.8% |
| Other Eastern Africa | 0.7% |
| China | 0.6% |