| Statistic | Chapais | Quebec | National |
| Population | 1,451 | 8,565,732 | 38,134,230 |
| Population density (sq km) | 24 | 6 | 4 |
| Median age | 44.9 | 42.6 | 40.9 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married couples | 47% | 50% | 66% |
| Families w/ kids at home | 35% | 40% | 43% |
| Speak English only | 0.9% | 4.7% | 68.8% |
| Speak French only | 79.8% | 49.5% | 4.5% |
| Data | Percent |
| N/A | 0.0% |
| Data | Percent |
| Algeria | 0.3% |
| United States | 0.3% |
| Colombia | 0.2% |
| China | 0.1% |
| Côte d'Ivoire | 0.1% |