| Statistic | Summerhill Estates | Newmarket | Ontario |
| Population | 12,239 | 88,702 | 14,804,681 |
| Population density (sq km) | 2,175 | 2,331 | 15 |
| Median age | 36.4 | 40.6 | 40.9 |
| Male/Female ratio | 1.1:1 | 1.1:1 | 1.0:1 |
| Married couples | 74% | 73% | 71% |
| Families w/ kids at home | 60% | 53% | 46% |
| Speak English only | 90.9% | 90.2% | 86.1% |
| Speak French only | 0.1% | 0.0% | 0.3% |
| Data | Percent |
| Chinese | 7.5% |
| South Asian | 5.9% |
| Southeast Asian | 5.4% |
| West Asian | 4.6% |
| Black | 3.1% |
| Data | Percent |
| Iran | 3.0% |
| China | 2.6% |
| Philippines | 2.3% |
| India | 2.0% |
| Other Southeastern Asia | 1.8% |