| Statistic | Cardiff Acres | Sarnia | Ontario |
| Population | 1,545 | 74,477 | 14,804,681 |
| Population density (sq km) | 2,736 | 449 | 15 |
| Median age | 33.8 | 45.8 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.1:1 | 1.0:1 |
| Married couples | 54% | 68% | 71% |
| Families w/ kids at home | 38% | 36% | 46% |
| Speak English only | 93.1% | 91.9% | 86.1% |
| Speak French only | 0.2% | 0.1% | 0.3% |
| Data | Percent |
| Black | 4.0% |
| South Asian | 3.7% |
| Latin American | 2.6% |
| Multiple Visible Minorities | 0.7% |
| Filipino | 0.4% |
| Data | Percent |
| Pakistan | 1.4% |
| United Kingdom | 1.1% |
| India | 0.9% |
| United States | 0.7% |
| Other Eastern Africa | 0.6% |