| Statistic | Lac-Mégantic | Quebec | National |
| Population | 5,501 | 8,565,732 | 38,134,230 |
| Population density (sq km) | 254 | 6 | 4 |
| Median age | 51.9 | 42.6 | 40.9 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married couples | 49% | 50% | 66% |
| Families w/ kids at home | 32% | 40% | 43% |
| Speak English only | 0.1% | 4.7% | 68.8% |
| Speak French only | 74.1% | 49.5% | 4.5% |
| Data | Percent |
| Southeast Asian | 0.4% |
| Black | 0.3% |
| Korean | 0.1% |
| All Other Visible Minorities | 0.1% |
| Chinese | 0.1% |
| Data | Percent |
| United States | 0.4% |
| Other West Central Asia And Middle East | 0.2% |
| France | 0.1% |
| Bosnia Herzegovina | 0.1% |
| Other Western Africa | 0.1% |