| Statistic | Cornwall Heights | St. John's | Newfoundland and Labrador |
| Population | 1,961 | 109,566 | 513,653 |
| Population density (sq km) | 3,561 | 256 | 1 |
| Median age | 52.3 | 39.7 | 46.3 |
| Male/Female ratio | 1.2:1 | 1.1:1 | 1.0:1 |
| Married couples | 60% | 64% | 70% |
| Families w/ kids at home | 32% | 38% | 39% |
| Speak English only | 90.5% | 90.1% | 94.6% |
| Speak French only | 0.0% | 0.0% | 0.0% |
| Data | Percent |
| Arab | 4.3% |
| Filipino | 0.7% |
| Latin American | 0.5% |
| Chinese | 0.1% |
| Multiple Visible Minorities | 0.1% |
| Data | Percent |
| United Kingdom | 1.6% |
| United States | 0.9% |
| Vietnam | 0.2% |
| India | 0.2% |
| Other Eastern Europe | 0.2% |