| Statistic | Sillery | Québec | Quebec |
| Population | 13,821 | 548,244 | 8,565,732 |
| Population density (sq km) | 1,964 | 1,210 | 6 |
| Median age | 50.6 | 43.1 | 42.6 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married couples | 54% | 44% | 50% |
| Families w/ kids at home | 41% | 36% | 40% |
| Speak English only | 0.5% | 0.3% | 4.7% |
| Speak French only | 33.5% | 58.9% | 49.5% |
| Data | Percent |
| Latin American | 1.8% |
| Black | 1.6% |
| Chinese | 1.5% |
| Arab | 1.2% |
| Southeast Asian | 1.1% |
| Data | Percent |
| France | 2.5% |
| China | 1.1% |
| Colombia | 0.7% |
| United States | 0.5% |
| Algeria | 0.4% |