| Statistic | Old Ottawa South | Ottawa | Ontario |
| Population | 6,743 | 1,058,126 | 14,804,681 |
| Population density (sq km) | 4,181 | 365 | 15 |
| Median age | 41.5 | 39.2 | 40.9 |
| Male/Female ratio | 1.1:1 | 1.0:1 | 1.0:1 |
| Married couples | 71% | 70% | 71% |
| Families w/ kids at home | 51% | 45% | 46% |
| Speak English only | 48.8% | 59.3% | 86.1% |
| Speak French only | 0.3% | 1.4% | 0.3% |
| Data | Percent |
| Black | 3.4% |
| Chinese | 2.8% |
| South Asian | 1.9% |
| Arab | 1.6% |
| Filipino | 1.0% |
| Data | Percent |
| United Kingdom | 3.9% |
| United States | 3.0% |
| Romania | 1.0% |
| China | 0.7% |
| Philippines | 0.6% |