| Statistic | Lamontagne | Saint-Jérôme | Quebec |
| Population | 5,925 | 79,702 | 8,565,732 |
| Population density (sq km) | 472 | 866 | 6 |
| Median age | 41.1 | 44.6 | 42.6 |
| Male/Female ratio | 0.9:1 | 1.1:1 | 1.0:1 |
| Married couples | 44% | 41% | 50% |
| Families w/ kids at home | 47% | 35% | 40% |
| Speak English only | 0.2% | 0.3% | 4.7% |
| Speak French only | 60.5% | 63.3% | 49.5% |
| Data | Percent |
| Black | 0.7% |
| Latin American | 0.5% |
| Multiple Visible Minorities | 0.3% |
| Chinese | 0.3% |
| Southeast Asian | 0.2% |
| Data | Percent |
| France | 0.8% |
| Other Central America | 0.3% |
| China | 0.3% |
| Other Western Europe | 0.2% |
| Colombia | 0.2% |