| Index | Casselman | Ontario | National |
| Average School Score | 85.3 | 67.5 | 66.1 |
| Total public schools | 8 | 7,342 | 17,366 |
| Index | Casselman | Ontario | National |
| No certificate, diploma or degree | 20.0% | 15.9% | 16.7% |
| High School certificate or equivalent | 79.9% | 84.1% | 83.3% |
| Apprenticeship or trades certificate | 53.6% | 56.9% | 56.8% |
| College or other non-university diploma | 44.8% | 51.1% | 47.4% |
| University certificate or below bachelor | 20.4% | 29.8% | 27.5% |
| Bachelor's degree | 19.0% | 27.9% | 25.1% |
| Above bachelor's degree | 4.3% | 9.1% | 8.1% |
| City | Population | Avg. School Score | National Avg. |
| Russell, ON | 18,518 | 75.7 | 14.5% |
| The Nation / La Nation, ON | 13,890 | 73.2 | 10.6% |
| Clarence-Rockland, ON | 27,082 | 72.9 | 10.2% |
| North Stormont, ON | 7,196 | 62.8 | 5.1% |
| Casselman, ON | 3,649 | 85.3 | 28.9% |
| City | Population | Avg. School Score | National Avg. |
| Powassan, ON | 3,653 | 72.1 | 9.0% |
| Highlands East, ON | 3,656 | 37.8 | 42.8% |
| Mulmur, ON | 3,667 | 74.8 | 13.1% |
| Sunshine Coast D, BC | 3,668 | 69.0 | 4.3% |
| Lake Cowichan, BC | 3,686 | 54.7 | 17.3% |
| Casselman, ON | 3,649 | 85.3 | 28.9% |