| Statistic | Dundalk | Southgate | Ontario |
| Population | 2,067 | 7,828 | 14,804,681 |
| Population density (sq km) | 705 | 11 | 15 |
| Median age | 40.3 | 39.8 | 40.9 |
| Male/Female ratio | 1.0:1 | 0.9:1 | 1.0:1 |
| Married couples | 63% | 72% | 71% |
| Families w/ kids at home | 42% | 44% | 46% |
| Speak English only | 95.3% | 93.3% | 86.1% |
| Speak French only | 0.0% | 0.0% | 0.3% |
| Data | Percent |
| Black | 2.0% |
| Multiple Visible Minorities | 0.2% |
| South Asian | 0.1% |
| Latin American | 0.1% |
| N/A | 0.0% |
| Data | Percent |
| United States | 1.3% |
| Portugal | 1.0% |
| Mexico | 1.0% |
| Germany | 0.8% |
| Guyana | 0.7% |