| Statistic | Saint-Léolin | New Brunswick | National |
| Population | 638 | 779,582 | 38,134,230 |
| Population density (sq km) | 31 | 11 | 4 |
| Median age | 54.1 | 45.7 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 57% | 66% | 66% |
| Families w/ kids at home | 36% | 37% | 43% |
| Speak English only | 0.0% | 57.5% | 68.8% |
| Speak French only | 49.4% | 7.9% | 4.5% |
| Data | Percent |
| N/A | 0.0% |
| Data | Percent |
| Hungary | 0.2% |
| Philippines | 0.2% |
| United Kingdom | 0.2% |
| Other Western Africa | 0.2% |
| N/A | 0.0% |