| Statistic | Mountainside | Burlington | Ontario |
| Population | 8,292 | 197,435 | 14,804,681 |
| Population density (sq km) | 2,412 | 1,060 | 15 |
| Median age | 40.8 | 42.5 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.1:1 | 1.0:1 |
| Married couples | 65% | 75% | 71% |
| Families w/ kids at home | 40% | 46% | 46% |
| Speak English only | 91.9% | 90.0% | 86.1% |
| Speak French only | 0.1% | 0.1% | 0.3% |
| Data | Percent |
| Filipino | 2.5% |
| Black | 2.4% |
| South Asian | 2.0% |
| Chinese | 1.3% |
| Latin American | 1.3% |
| Data | Percent |
| United Kingdom | 4.1% |
| Philippines | 1.6% |
| Poland | 1.4% |
| India | 1.3% |
| United States | 1.0% |