| Statistic | Secteur Lachenaie | Terrebonne | Quebec |
| Population | 7,837 | 119,135 | 8,565,732 |
| Population density (sq km) | 2,692 | 755 | 6 |
| Median age | 39.6 | 40.1 | 42.6 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 47% | 46% | 50% |
| Families w/ kids at home | 46% | 48% | 40% |
| Speak English only | 0.6% | 0.5% | 4.7% |
| Speak French only | 56.9% | 56.4% | 49.5% |
| Data | Percent |
| Black | 10.1% |
| Latin American | 2.5% |
| Arab | 2.1% |
| Southeast Asian | 0.7% |
| Chinese | 0.3% |
| Data | Percent |
| Haiti | 3.0% |
| Morocco | 1.1% |
| France | 0.7% |
| Algeria | 0.4% |
| Cameroon | 0.4% |