| 10 | 1 | Iroquois Ridge High School | Halton DSB | Oakville | Public | 9.2 | 9.2 | 9.2 | 8.9 | +0.3 ↑ | Visit |
| 13 | 1 | ÉSC Sainte-Trinité | CS catholique MonAvenir | Oakville | Catholic | 9.0 | 9.0 | 9.0 | 8.4 | +0.6 ↑ | — |
| 21 | 2 | Abbey Park High School | Halton DSB | Oakville | Public | 8.9 | 8.9 | 8.9 | 8.6 | +0.3 ↑ | Visit |
| 28 | 3 | Oakville Trafalgar High School | Halton DSB | Oakville | Public | 8.9 | 8.9 | 9.2 | 8.9 | 0.0 → | Visit |
| 36 | 4 | White Oaks Secondary School | Halton DSB | Oakville | Public | 8.8 | 8.8 | 8.5 | 8.4 | +0.4 ↑ | Visit |
| 56 | 5 | Garth Webb Secondary School | Halton DSB | Oakville | Public | 8.5 | 8.5 | 8.6 | 7.9 | +0.6 ↑ | Visit |
| 94 | 7 | Thomas A Blakelock High School | Halton DSB | Oakville | Public | 8.2 | 8.2 | 7.8 | 8.0 | +0.2 ↑ | Visit |
| 100 | 3 | St. Ignatius of Loyola Catholic Secondary School | Halton CDSB | Oakville | Catholic | 8.1 | 8.1 | 8.1 | 8.2 | -0.1 ↓ | Visit |
| 103 | 4 | St. Thomas Aquinas Catholic Secondary School | Halton CDSB | Oakville | Catholic | 8.1 | 8.1 | 8.1 | 7.7 | +0.4 ↑ | Visit |
| 245 | 7 | Holy Trinity Catholic Secondary School | Halton CDSB | Oakville | Catholic | 7.3 | 7.3 | 7.8 | 7.5 | -0.2 ↓ | Visit |
| 775 | 11 | Thomas Merton Catholic Secondary School | Halton CDSB | Oakville | Catholic | — | — | — | — | — | Visit |
| 790 | 12 | Thomas Merton Online Catholic School | Halton CDSB | Oakville | Catholic | — | — | — | — | — | — |