| Statistic | Cobourg | Cobourg | Ontario |
| Population | 20,647 | 20,684 | 14,804,681 |
| Population density (sq km) | 944 | 895 | 15 |
| Median age | 53.8 | 53.8 | 40.9 |
| Male/Female ratio | 1.2:1 | 1.2:1 | 1.0:1 |
| Married couples | 70% | 70% | 71% |
| Families w/ kids at home | 31% | 31% | 46% |
| Speak English only | 91.7% | 91.8% | 86.1% |
| Speak French only | 0.0% | 0.0% | 0.3% |
| Data | Percent |
| Black | 1.9% |
| South Asian | 0.9% |
| Chinese | 0.5% |
| Korean | 0.3% |
| Latin American | 0.3% |
| Data | Percent |
| United Kingdom | 5.9% |
| United States | 1.0% |
| Germany | 0.8% |
| Netherlands | 0.6% |
| Guyana | 0.3% |