| Statistic | Cap-Rouge | Québec | Quebec |
| Population | 17,007 | 548,244 | 8,565,732 |
| Population density (sq km) | 1,452 | 1,210 | 6 |
| Median age | 46.4 | 43.1 | 42.6 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 54% | 44% | 50% |
| Families w/ kids at home | 45% | 36% | 40% |
| Speak English only | 0.3% | 0.3% | 4.7% |
| Speak French only | 43.1% | 58.9% | 49.5% |
| Data | Percent |
| Latin American | 1.6% |
| Chinese | 1.2% |
| Arab | 1.0% |
| Black | 1.0% |
| Southeast Asian | 0.6% |
| Data | Percent |
| France | 1.5% |
| China | 0.7% |
| Algeria | 0.5% |
| Romania | 0.4% |
| Mexico | 0.3% |
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