| Statistic | Alliston | New Tecumseth | Ontario |
| Population | 18,378 | 40,488 | 14,804,681 |
| Population density (sq km) | 1,310 | 140 | 15 |
| Median age | 38.5 | 42.5 | 40.9 |
| Male/Female ratio | 1.0:1 | 1.0:1 | 1.0:1 |
| Married couples | 65% | 70% | 71% |
| Families w/ kids at home | 47% | 43% | 46% |
| Speak English only | 93.9% | 94.3% | 86.1% |
| Speak French only | 0.0% | 0.0% | 0.3% |
| Data | Percent |
| South Asian | 3.9% |
| Black | 2.3% |
| Latin American | 1.5% |
| Chinese | 0.8% |
| Southeast Asian | 0.7% |
| Data | Percent |
| United Kingdom | 2.0% |
| India | 0.8% |
| Italy | 0.6% |
| Poland | 0.5% |
| Portugal | 0.5% |