| Statistic | Waterdown | Hamilton | Ontario |
| Population | 18,958 | 11,739 | 14,804,681 |
| Population density (sq km) | 1,635 | 518 | 15 |
| Median age | 37.8 | 40.5 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 76% | 68% | 71% |
| Families w/ kids at home | 55% | 44% | 46% |
| Speak English only | 92.8% | 92.3% | 86.1% |
| Speak French only | 0.0% | 0.1% | 0.3% |
| Data | Percent |
| South Asian | 3.7% |
| Black | 1.7% |
| Chinese | 1.7% |
| Latin American | 0.7% |
| Filipino | 0.7% |
| Data | Percent |
| United Kingdom | 3.7% |
| India | 1.0% |
| United States | 0.8% |
| Poland | 0.7% |
| Netherlands | 0.6% |