| Statistic | Mount Cashel | St. John's | Newfoundland and Labrador |
| Population | 3,453 | 109,566 | 513,653 |
| Population density (sq km) | 2,359 | 256 | 1 |
| Median age | 53.5 | 39.7 | 46.3 |
| Male/Female ratio | 1.3:1 | 1.1:1 | 1.0:1 |
| Married couples | 70% | 64% | 70% |
| Families w/ kids at home | 33% | 38% | 39% |
| Speak English only | 90.3% | 90.1% | 94.6% |
| Speak French only | 0.1% | 0.0% | 0.0% |
| Data | Percent |
| South Asian | 3.6% |
| Chinese | 2.8% |
| Arab | 2.5% |
| Black | 1.6% |
| Filipino | 0.9% |
| Data | Percent |
| United Kingdom | 1.1% |
| Syria | 1.0% |
| China | 1.0% |
| Jamaica | 0.8% |
| United States | 0.8% |