| Statistic | Rosslyn | Thunder Bay | Ontario |
| Population | 2,431 | 111,499 | 14,804,681 |
| Population density (sq km) | 338 | 334 | 15 |
| Median age | 49.7 | 44.3 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 83% | 64% | 71% |
| Families w/ kids at home | 44% | 38% | 46% |
| Speak English only | 91.5% | 91.6% | 86.1% |
| Speak French only | 0.2% | 0.1% | 0.3% |
| Data | Percent |
| Chinese | 0.3% |
| N/A | 0.0% |
| Data | Percent |
| Italy | 1.2% |
| Other Northern Europe | 0.9% |
| United Kingdom | 0.6% |
| Germany | 0.4% |
| Poland | 0.3% |