| Statistic | Chelsea | Quebec | National |
| Population | 7,181 | 8,565,732 | 38,134,230 |
| Population density (sq km) | 62 | 6 | 4 |
| Median age | 46.2 | 42.6 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 65% | 50% | 66% |
| Families w/ kids at home | 49% | 40% | 43% |
| Speak English only | 20.8% | 4.7% | 68.8% |
| Speak French only | 8.3% | 49.5% | 4.5% |
| Data | Percent |
| Black | 0.8% |
| West Asian | 0.6% |
| Chinese | 0.6% |
| Japanese | 0.5% |
| Arab | 0.3% |
| Data | Percent |
| United Kingdom | 1.6% |
| France | 0.9% |
| United States | 0.8% |
| Iran | 0.4% |
| Romania | 0.4% |
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