| Statistic | Johnston | New Brunswick | National |
| Population | 513 | 779,582 | 38,134,230 |
| Population density (sq km) | 1 | 11 | 4 |
| Median age | 56.6 | 45.7 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 81% | 66% | 66% |
| Families w/ kids at home | 30% | 37% | 43% |
| Speak English only | 90.8% | 57.5% | 68.8% |
| Speak French only | 0.0% | 7.9% | 4.5% |
| Data | Percent |
| Black | 2.3% |
| N/A | 0.0% |
| Data | Percent |
| Germany | 2.3% |
| United States | 1.3% |
| United Kingdom | 0.8% |
| Trinidad And Tobago | 0.2% |
| Other Eastern Africa | 0.2% |