| Statistic | Leamington | Ontario | National |
| Population | 29,703 | 14,804,681 | 38,134,230 |
| Population density (sq km) | 109 | 15 | 4 |
| Median age | 40.8 | 40.9 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 75% | 71% | 66% |
| Families w/ kids at home | 44% | 46% | 43% |
| Speak English only | 90.3% | 86.1% | 68.8% |
| Speak French only | 0.1% | 0.3% | 4.5% |
| Data | Percent |
| Arab | 3.5% |
| Latin American | 3.4% |
| Southeast Asian | 2.7% |
| Black | 2.0% |
| Filipino | 0.8% |
| Data | Percent |
| Mexico | 10.4% |
| Portugal | 2.7% |
| Lebanon | 2.2% |
| Italy | 1.6% |
| Other Southeastern Asia | 1.2% |