| Statistic | King William Estates | St. John's | Newfoundland and Labrador |
| Population | 140 | 109,566 | 513,653 |
| Population density (sq km) | 846 | 256 | 1 |
| Median age | 42.8 | 39.7 | 46.3 |
| Male/Female ratio | 1.0:1 | 1.1:1 | 1.0:1 |
| Married couples | 88% | 64% | 70% |
| Families w/ kids at home | 60% | 38% | 39% |
| Speak English only | 82.4% | 90.1% | 94.6% |
| Speak French only | 0.0% | 0.0% | 0.0% |
| Data | Percent |
| South Asian | 8.1% |
| Chinese | 4.7% |
| Arab | 0.7% |
| Southeast Asian | 0.7% |
| N/A | 0.0% |
| Data | Percent |
| China | 2.7% |
| Pakistan | 2.0% |
| United Kingdom | 2.0% |
| India | 1.4% |
| Hong Kong | 1.4% |