| Statistic | Place Longueuil | Longueuil | Quebec |
| Population | 7,783 | 249,920 | 8,565,732 |
| Population density (sq km) | 3,387 | 2,158 | 6 |
| Median age | 39.9 | 41.7 | 42.6 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married couples | 53% | 49% | 50% |
| Families w/ kids at home | 31% | 39% | 40% |
| Speak English only | 7.4% | 2.7% | 4.7% |
| Speak French only | 31.9% | 46.6% | 49.5% |
| Data | Percent |
| Black | 7.4% |
| Latin American | 6.8% |
| Arab | 5.5% |
| Chinese | 5.1% |
| West Asian | 3.4% |
| Data | Percent |
| China | 2.5% |
| Iran | 2.1% |
| France | 1.8% |
| Other Western Africa | 1.7% |
| Colombia | 1.6% |