| Ontario Rank | Board Rank | School | Board | City | Type | Overall Score | 2023‑24 | 2022‑23 | 2021‑22 | 3‑Year Change | Website |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 311 | 1 | Ursuline College Chatham Catholic Secondary School | St Clair CDSB | Chatham | Catholic | 7.1 | 7.1 | 6.9 | 6.7 | +0.4 ↑ | Visit |
| 620 | 7 | Chatham-Kent Secondary School | Lambton Kent DSB | Chatham | Public | 5.6 | 5.6 | 5.2 | 5.8 | -0.2 ↓ | Visit |
| 681 | 9 | John McGregor Secondary School | Lambton Kent DSB | Chatham | Public | 5.0 | 5.0 | 4.7 | 4.5 | +0.5 ↑ | Visit |