| Statistic | Downtown Belleville | Belleville | Ontario |
| Population | 595 | 55,515 | 14,804,681 |
| Population density (sq km) | 1,552 | 212 | 15 |
| Median age | 53.1 | 44.5 | 40.9 |
| Male/Female ratio | 0.9:1 | 1.1:1 | 1.0:1 |
| Married couples | 49% | 63% | 71% |
| Families w/ kids at home | 14% | 36% | 46% |
| Speak English only | 88.5% | 93.2% | 86.1% |
| Speak French only | 0.0% | 0.1% | 0.3% |
| Data | Percent |
| South Asian | 3.7% |
| Chinese | 1.7% |
| Japanese | 0.2% |
| Southeast Asian | 0.2% |
| N/A | 0.0% |
| Data | Percent |
| United Kingdom | 2.4% |
| Germany | 1.9% |
| Philippines | 1.7% |
| China | 1.5% |
| United States | 1.5% |