| Statistic | Monaghan Subdivision | Peterborough | Ontario |
| Population | 3,831 | 89,500 | 14,804,681 |
| Population density (sq km) | 2,218 | 1,324 | 15 |
| Median age | 36.7 | 42.3 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.1:1 | 1.0:1 |
| Married couples | 48% | 63% | 71% |
| Families w/ kids at home | 35% | 36% | 46% |
| Speak English only | 92.9% | 91.9% | 86.1% |
| Speak French only | 0.1% | 0.0% | 0.3% |
| Data | Percent |
| South Asian | 1.1% |
| Filipino | 1.0% |
| Black | 0.9% |
| Multiple Visible Minorities | 0.4% |
| Southeast Asian | 0.3% |
| Data | Percent |
| United Kingdom | 2.1% |
| Germany | 1.0% |
| United States | 0.9% |
| Netherlands | 0.4% |
| Poland | 0.4% |