| Statistic | Saint-Augustin-de-Desmaures | Québec | Quebec |
| Population | 19,710 | 548,244 | 8,565,732 |
| Population density (sq km) | 233 | 1,210 | 6 |
| Median age | 46.3 | 43.1 | 42.6 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 50% | 44% | 50% |
| Families w/ kids at home | 48% | 36% | 40% |
| Speak English only | 0.1% | 0.3% | 4.7% |
| Speak French only | 50.7% | 58.9% | 49.5% |
| Data | Percent |
| Chinese | 0.7% |
| Black | 0.7% |
| Latin American | 0.4% |
| Southeast Asian | 0.4% |
| Arab | 0.2% |
| Data | Percent |
| France | 0.8% |
| China | 0.4% |
| United States | 0.3% |
| Vietnam | 0.2% |
| Other Western Europe | 0.2% |
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