| Statistic | Saint-Isidore | New Brunswick | National |
| Population | 1,353 | 779,582 | 38,134,230 |
| Population density (sq km) | 33 | 11 | 4 |
| Median age | 52.6 | 45.7 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 62% | 66% | 66% |
| Families w/ kids at home | 34% | 37% | 43% |
| Speak English only | 0.3% | 57.5% | 68.8% |
| Speak French only | 50.1% | 7.9% | 4.5% |
| Data | Percent |
| N/A | 0.0% |
| Data | Percent |
| Romania | 0.1% |
| Vietnam | 0.1% |
| South Korea | 0.1% |
| Other Southern Europe | 0.1% |
| N/A | 0.0% |