| Statistic | Saint-Romuald | Lévis | Quebec |
| Population | 14,949 | 149,331 | 8,565,732 |
| Population density (sq km) | 794 | 327 | 6 |
| Median age | 49.1 | 43.2 | 42.6 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married couples | 45% | 45% | 50% |
| Families w/ kids at home | 32% | 42% | 40% |
| Speak English only | 0.1% | 0.1% | 4.7% |
| Speak French only | 61.0% | 64.5% | 49.5% |
| Data | Percent |
| Arab | 1.2% |
| Latin American | 0.7% |
| Black | 0.7% |
| Chinese | 0.6% |
| Southeast Asian | 0.4% |
| Data | Percent |
| France | 1.0% |
| United States | 0.4% |
| China | 0.4% |
| Morocco | 0.3% |
| Algeria | 0.3% |