| Statistic | Saint-Louis-de-Champlain | Trois-Rivières | Quebec |
| Population | 2,846 | 138,766 | 8,565,732 |
| Population density (sq km) | 129 | 478 | 6 |
| Median age | 47.0 | 46.6 | 42.6 |
| Male/Female ratio | 1.1:1 | 1.1:1 | 1.0:1 |
| Married couples | 47% | 43% | 50% |
| Families w/ kids at home | 37% | 34% | 40% |
| Speak English only | 0.1% | 0.2% | 4.7% |
| Speak French only | 74.7% | 68.3% | 49.5% |
| Data | Percent |
| Chinese | 0.6% |
| Arab | 0.5% |
| Korean | 0.0% |
| N/A | 0.0% |
| Data | Percent |
| China | 0.3% |
| France | 0.3% |
| Tunisia | 0.3% |
| Other Southeastern Asia | 0.1% |
| Cambodia | 0.0% |