| Statistic | Marystown | Newfoundland and Labrador | National |
| Population | 4,997 | 513,653 | 38,134,230 |
| Population density (sq km) | 80 | 1 | 4 |
| Median age | 48.7 | 46.3 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 70% | 70% | 66% |
| Families w/ kids at home | 40% | 39% | 43% |
| Speak English only | 93.9% | 94.6% | 68.8% |
| Speak French only | 0.0% | 0.0% | 4.5% |
| Data | Percent |
| Arab | 0.4% |
| Filipino | 0.2% |
| Latin American | 0.2% |
| Southeast Asian | 0.2% |
| Multiple Visible Minorities | 0.2% |
| Data | Percent |
| Iraq | 0.1% |
| United States | 0.1% |
| France | 0.1% |
| Nigeria | 0.1% |
| Philippines | 0.1% |