| Statistic | Lock 3 | St. Catharines | Ontario |
| Population | 412 | 140,913 | 14,804,681 |
| Population density (sq km) | 605 | 1,410 | 15 |
| Median age | 37.1 | 44.4 | 40.9 |
| Male/Female ratio | 1.1:1 | 1.1:1 | 1.0:1 |
| Married couples | 61% | 66% | 71% |
| Families w/ kids at home | 43% | 38% | 46% |
| Speak English only | 92.5% | 91.9% | 86.1% |
| Speak French only | 0.0% | 0.1% | 0.3% |
| Data | Percent |
| Arab | 6.7% |
| Black | 3.9% |
| Chinese | 3.3% |
| Latin American | 3.1% |
| All Other Visible Minorities | 2.6% |
| Data | Percent |
| Iraq | 1.8% |
| Philippines | 1.8% |
| Colombia | 1.5% |
| Bosnia Herzegovina | 1.5% |
| Other Northern Africa | 1.5% |