| 71 | Town Centre Private School - Pre-School | Markham | Online/Site Based | Ontario Federation of Independent Schools | Visit |
| 134 | Royal Cachet Montessori School | Markham | Site based only | Canadian Council of Montessori Administrators (CCMA) | — |
| 146 | Trinity Montessori School | Markham | Site based only | Canadian Council of Montessori Administrators (CCMA) | Visit |
| 176 | Canglory International Academy | Markham | Online/Site Based | Independent and Private School Forum | Visit |
| 307 | Wesley Christian Academy | Markham | Site based only | EDVance | Visit |
| 346 | AIS Elementary School (Aurora Internatio | Markham | Site based only | No Association Membership | — |
| 347 | AIS School | Markham | Online/Site Based | No Association Membership | Visit |
| 395 | Aspiration Academy | Markham | Site based only | No Association Membership | Visit |
| 451 | Bravo Education Centre | Markham | Site based only | No Association Membership | Visit |
| 454 | BrightMinds Academy International | Markham | Online/Site Based | Other | Visit |
| 475 | Canada Cambridge Academy | Markham | Online/Site Based | No Association Membership | Visit |
| 488 | Canadian International Scholars School | Markham | Online/Site Based | No Association Membership | — |
| 640 | Goldenlink Academy | Markham | Online/Site Based | No Association Membership | Visit |
| 664 | Hansen Academy | Markham | Online/Site Based | No Association Membership | — |
| 715 | Islamic Academy of Markham | Markham | Site based only | No Association Membership | — |
| 721 | J Addison School | Markham | Site based only | No Association Membership | Visit |
| 727 | JEI Learning Center - Greensborough | Markham | Online/Site Based | No Association Membership | Visit |
| 857 | MindTech Academic Schools, Inc | Markham | Site based only | No Association Membership | Visit |
| 971 | Peoples Christian Academy | Markham | Site based only | Other | Visit |
| 1058 | Silverwoods International School | Markham | Online/Site Based | No Association Membership | Visit |
| 1065 | Somerset Academy | Markham | Site based only | No Association Membership | Visit |
| 1090 | StudentScholars Private School | Markham | Online/Site Based | No Association Membership | Visit |
| 1096 | Sunrise Montessori School | Markham | Site based only | No Association Membership | — |
| 1138 | Toronto High School | Markham | Online/Site Based | No Association Membership | Visit |
| 1146 | Trillium School | Markham | Site based only | No Association Membership | Visit |
| 1163 | Upper York School | Markham | Online/Site Based | No Association Membership | Visit |
| 1188 | Wells Academy | Markham | Online Only | No Association Membership | Visit |
| 1213 | Wishing Well Montessori Schools | Markham | Site based only | No Association Membership | Visit |