| Statistic | Millbrook | Cavan Monaghan | Ontario |
| Population | 2,912 | 10,407 | 14,804,681 |
| Population density (sq km) | 639 | 31 | 15 |
| Median age | 44.7 | 46.3 | 40.9 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married couples | 73% | 75% | 71% |
| Families w/ kids at home | 42% | 44% | 46% |
| Speak English only | 94.8% | 94.4% | 86.1% |
| Speak French only | 0.0% | 0.0% | 0.3% |
| Data | Percent |
| South Asian | 1.8% |
| Black | 0.9% |
| Filipino | 0.3% |
| Multiple Visible Minorities | 0.3% |
| Chinese | 0.2% |
| Data | Percent |
| United Kingdom | 2.0% |
| United States | 0.9% |
| Germany | 0.8% |
| Other Northern Europe | 0.5% |
| Hungary | 0.4% |