| Index | St. Thomas | Ontario | National |
| Average School Score | 55.3 | 67.5 | 66.1 |
| Total public schools | 17 | 7,342 | 17,366 |
| Index | St. Thomas | Ontario | National |
| No certificate, diploma or degree | 20.0% | 15.9% | 16.7% |
| High School certificate or equivalent | 80.3% | 84.1% | 83.3% |
| Apprenticeship or trades certificate | 48.6% | 56.9% | 56.8% |
| College or other non-university diploma | 41.3% | 51.1% | 47.4% |
| University certificate or below bachelor | 12.0% | 29.8% | 27.5% |
| Bachelor's degree | 11.1% | 27.9% | 25.1% |
| Above bachelor's degree | 2.5% | 9.1% | 8.1% |
| City | Population | Avg. School Score | National Avg. |
| Southwold, ON | 4,540 | 66.2 | 0.0% |
| Central Elgin, ON | 13,549 | 66.0 | 0.2% |
| Malahide, ON | 9,817 | 64.1 | 3.1% |
| London, ON | 421,456 | 63.0 | 4.8% |
| Aylmer, ON | 8,327 | 60.5 | 8.5% |
| St. Thomas, ON | 42,918 | 55.3 | 16.4% |
| City | Population | Avg. School Score | National Avg. |
| Bradford West Gwillimbury, ON | 42,843 | 66.4 | 0.4% |
| Vernon, BC | 43,975 | 62.2 | 5.9% |
| Rocky View County, AB | 44,056 | 63.6 | 3.8% |
| Timmins, ON | 41,763 | 55.5 | 16.2% |
| Innisfil, ON | 44,305 | 59.9 | 9.4% |
| St. Thomas, ON | 42,918 | 55.3 | 16.4% |