| Statistic | Downtown Port Arthur | Thunder Bay | Ontario |
| Population | 759 | 111,499 | 14,804,681 |
| Population density (sq km) | 1,448 | 334 | 15 |
| Median age | 44.1 | 44.3 | 40.9 |
| Male/Female ratio | 0.7:1 | 1.0:1 | 1.0:1 |
| Married couples | 41% | 64% | 71% |
| Families w/ kids at home | 21% | 38% | 46% |
| Speak English only | 89.0% | 91.6% | 86.1% |
| Speak French only | 0.0% | 0.1% | 0.3% |
| Data | Percent |
| South Asian | 2.8% |
| Black | 2.1% |
| Chinese | 0.7% |
| Latin American | 0.7% |
| Southeast Asian | 0.5% |
| Data | Percent |
| Italy | 1.6% |
| Other Northern Europe | 0.8% |
| Other Southeastern Asia | 0.7% |
| Iraq | 0.5% |
| Ghana | 0.3% |