| Statistic | Glen Cairn | London | Ontario |
| Population | 16,832 | 421,456 | 14,804,681 |
| Population density (sq km) | 2,501 | 984 | 15 |
| Median age | 38.2 | 39.1 | 40.9 |
| Male/Female ratio | 1.1:1 | 1.1:1 | 1.0:1 |
| Married couples | 55% | 67% | 71% |
| Families w/ kids at home | 37% | 41% | 46% |
| Speak English only | 91.9% | 90.9% | 86.1% |
| Speak French only | 0.1% | 0.1% | 0.3% |
| Data | Percent |
| Black | 7.6% |
| Arab | 5.2% |
| Latin American | 4.5% |
| West Asian | 1.4% |
| South Asian | 1.1% |
| Data | Percent |
| Poland | 2.5% |
| Portugal | 1.6% |
| Iraq | 1.4% |
| United Kingdom | 1.4% |
| Italy | 1.2% |