| Statistic | Southdown | Mississauga | Ontario |
| Population | 993 | 764,342 | 14,804,681 |
| Population density (sq km) | 40 | 2,669 | 15 |
| Median age | 38.5 | 39.9 | 40.9 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married couples | 67% | 76% | 71% |
| Families w/ kids at home | 50% | 55% | 46% |
| Speak English only | 90.8% | 89.1% | 86.1% |
| Speak French only | 0.4% | 0.1% | 0.3% |
| Data | Percent |
| Black | 11.4% |
| Filipino | 3.9% |
| Latin American | 3.9% |
| South Asian | 3.6% |
| All Other Visible Minorities | 3.2% |
| Data | Percent |
| Philippines | 7.1% |
| Poland | 1.8% |
| Jamaica | 1.8% |
| Other Caribbean And Bahamas | 1.8% |
| China | 1.4% |