| Statistic | Seaway | Welland | Ontario |
| Population | 5,947 | 56,929 | 14,804,681 |
| Population density (sq km) | 1,040 | 665 | 15 |
| Median age | 46.5 | 45.5 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.1:1 | 1.0:1 |
| Married couples | 73% | 65% | 71% |
| Families w/ kids at home | 39% | 37% | 46% |
| Speak English only | 86.7% | 84.6% | 86.1% |
| Speak French only | 0.3% | 0.3% | 0.3% |
| Data | Percent |
| Latin American | 2.7% |
| Chinese | 2.5% |
| Black | 1.5% |
| South Asian | 1.0% |
| Arab | 0.5% |
| Data | Percent |
| United Kingdom | 2.9% |
| Italy | 2.3% |
| United States | 1.8% |
| Germany | 0.6% |
| Poland | 0.6% |