| 90 | Central Montessori School - Thornhill | Thornhill | Site based only | Canadian Council of Montessori Administrators (CCMA) | — |
| 223 | King Heights Academy | Thornhill | Online/Site Based | IB Schools of Ontario | Visit |
| 254 | Or Haemet Sephardic School | Thornhill | Site based only | Centre for Jewish Education | Visit |
| 393 | As-Sadiq Islamic | Thornhill | Site based only | No Association Membership | Visit |
| 416 | Bais Yaakov of Thornhill | Thornhill | Site based only | No Association Membership | — |
| 580 | Eitz Chaim Schools | Thornhill | Site based only | No Association Membership | — |
| 692 | I AM SMART S-COOL | Thornhill | Site based only | No Association Membership | Visit |
| 739 | Kayla's Children Centre | Thornhill | Site based only | No Association Membership | Visit |
| 848 | Metro International Secondary Academy | THORNHILL | Online/Site Based | No Association Membership | Visit |
| 882 | Netivot Hatorah Day School | Thornhill | Site based only | No Association Membership | Visit |
| 965 | Peace School | Thornhill | Online/Site Based | No Association Membership | — |
| 1054 | Shmuel Zahavy Cheder Chabad School | Thornhill | Site based only | No Association Membership | Visit |
| 1143 | Toronto Waldorf School | Thornhill | Site based only | Other | Visit |
| 1156 | UMCA Rich Tree Academy | Thornhill | Online/Site Based | No Association Membership | Visit |