| Ontario Rank | Board Rank | School | City | Type | Overall Score | 2023‑24 | 2022‑23 | 2021‑22 | 3‑Year Change | Website |
|---|---|---|---|---|---|---|---|---|---|---|
| 140 | 1 | St Peter's & St Paul's Separate School | Durham | Catholic | 9.0 | 9.0 | 6.1 | 6.2 | +2.8 ↑ | Visit |
| 214 | 2 | Ecole Immaculee-Conception Separate School | Formosa | Catholic | 8.8 | 8.8 | 8.5 | 8.7 | +0.1 ↑ | Visit |
| 980 | 3 | Sacred Heart School | Mildmay | Catholic | 7.7 | 7.7 | 7.5 | 7.7 | 0.0 → | Visit |
| 1189 | 4 | St Joseph's School | Port Elgin | Catholic | 7.5 | 7.5 | 5.2 | 6.2 | +1.3 ↑ | Visit |
| 1472 | 5 | Holy Family Separate School | Hanover | Catholic | 7.2 | 7.2 | 5.9 | 6.4 | +0.8 ↑ | Visit |
| 1477 | 6 | St Teresa of Calcutta Catholic School | Walkerton | Catholic | 7.2 | 7.2 | 7.6 | 5.3 | +1.9 ↑ | Visit |
| 2058 | 7 | Sacred Heart Separate School | Teeswater | Catholic | 6.7 | 6.7 | — | 6.2 | +0.5 ↑ | Visit |
| 2317 | 8 | Mary Immaculate Community School | Chepstow | Catholic | 6.4 | 6.4 | 7.3 | 6.4 | 0.0 → | Visit |
| 2957 | 9 | St Anthony's Separate School | Kincardine | Catholic | 5.6 | 5.6 | 5.8 | 5.8 | -0.2 ↓ | Visit |
| 3064 | 10 | Notre Dame Catholic School | Owen Sound | Catholic | 5.4 | 5.4 | 5.7 | 6.5 | -1.1 ↓ | Visit |
| 4004 | 11 | St Basil's Separate School | Owen Sound | Catholic | — | — | — | — | — | Visit |