| Statistic | Greenhill | Peterborough | Ontario |
| Population | 4,731 | 89,500 | 14,804,681 |
| Population density (sq km) | 1,756 | 1,324 | 15 |
| Median age | 50.1 | 42.3 | 40.9 |
| Male/Female ratio | 1.1:1 | 1.1:1 | 1.0:1 |
| Married couples | 59% | 63% | 71% |
| Families w/ kids at home | 24% | 36% | 46% |
| Speak English only | 95.0% | 91.9% | 86.1% |
| Speak French only | 0.2% | 0.0% | 0.3% |
| Data | Percent |
| South Asian | 2.1% |
| Black | 0.5% |
| Chinese | 0.4% |
| All Other Visible Minorities | 0.3% |
| Southeast Asian | 0.2% |
| Data | Percent |
| United Kingdom | 2.8% |
| Netherlands | 0.7% |
| Germany | 0.7% |
| Italy | 0.4% |
| Philippines | 0.3% |
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