| Statistic | Crumlin | London | Ontario |
| Population | 692 | 421,456 | 14,804,681 |
| Population density (sq km) | 94 | 984 | 15 |
| Median age | 45.2 | 39.1 | 40.9 |
| Male/Female ratio | 0.9:1 | 1.1:1 | 1.0:1 |
| Married couples | 71% | 67% | 71% |
| Families w/ kids at home | 44% | 41% | 46% |
| Speak English only | 96.9% | 90.9% | 86.1% |
| Speak French only | 0.0% | 0.1% | 0.3% |
| Data | Percent |
| Korean | 1.6% |
| Southeast Asian | 1.6% |
| Latin American | 0.8% |
| Arab | 0.6% |
| Chinese | 0.6% |
| Data | Percent |
| Portugal | 2.9% |
| United Kingdom | 2.9% |
| Poland | 2.5% |
| Netherlands | 1.9% |
| Italy | 1.8% |