| Index | Carlton | St. Catharines | Ontario |
| Average School Score | 78.1 | 75.6 | 67.5 |
| Total public schools | 3 | 78 | 7,342 |
| Index | Carlton | St. Catharines | Ontario |
| No certificate, diploma or degree | 19.0% | 16.0% | 15.9% |
| High School certificate or equivalent | 80.6% | 83.6% | 84.1% |
| Apprenticeship or trades certificate | 47.1% | 52.5% | 56.9% |
| College or other non-university diploma | 38.4% | 45.1% | 51.1% |
| University certificate or below bachelor | 14.1% | 21.7% | 29.8% |
| Bachelor's degree | 13.1% | 20.3% | 27.9% |
| Above bachelor's degree | 3.3% | 6.3% | 9.1% |
| City | Population | Avg. School Score | National Avg. |
| Niagara-on-the-Lake, ON | 20,111 | 88.9 | 34.5% |
| Pelham, ON | 18,077 | 85.2 | 28.8% |
| Lincoln, ON | 27,082 | 78.5 | 18.7% |
| Niagara Falls, ON | 95,282 | 73.3 | 10.9% |
| Thorold, ON | 21,396 | 73.2 | 10.7% |
| St. Catharines, ON | 140,913 | 75.6 | 14.3% |
| City | Population | Avg. School Score | National Avg. |
| Cambridge, ON | 140,221 | 64.0 | 3.2% |
| Milton, ON | 142,128 | 70.9 | 7.2% |
| Whitby, ON | 142,607 | 74.6 | 12.7% |
| Ajax, ON | 138,303 | 69.3 | 4.7% |
| Kelowna, BC | 145,612 | 62.5 | 5.5% |
| St. Catharines, ON | 140,913 | 75.6 | 14.3% |