| 19 | Holy Trinity School | Richmond Hill | Online/Site Based | Conference of Independent Schools of Ontario | Visit |
| 20 | HTS Global Online Campus | Richmond Hill | Online Only | Conference of Independent Schools of Ontario | Visit |
| 31 | Prestige School, The -Richmond Hill | Richmond Hill | Site based only | Ontario Federation of Independent Schools | Visit |
| 113 | Richland Academy | Richmond Hill | Site based only | IB Schools of Ontario | Visit |
| 176 | Alpha Star High School | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 195 | Astrum Academy | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 198 | Aubrey Academy | Richmond Hill | Online Only | No Association Membership | Visit |
| 205 | Base Academy | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 262 | Canada Capital International Academy | Richmond Hill | Online Only | No Association Membership | — |
| 286 | Canadian private school | Richmond hill | Online/Site Based | No Association Membership | Visit |
| 290 | Canadian Top Science Academy | Richmond Hill | Online/Site Based | Other | Visit |
| 291 | Canadians Private School | Richmond hill | Online/Site Based | No Association Membership | Visit |
| 301 | Century Private School HS | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 331 | CWS Canadian World Schools | Richmond Hill | Online Only | No Association Membership | — |
| 346 | Discovery Academy Inc | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 349 | Duowei Education Centre | Richmond Hill | Site based only | No Association Membership | — |
| 355 | Edukos Academy | Richmond Hill | Online Only | No Association Membership | — |
| 363 | Elton Academy | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 401 | Global Private School | Richmond Hill | Online/Site Based | Other | Visit |
| 411 | Great Lyn International Academy | Richmond Hill | Site based only | No Association Membership | Visit |
| 412 | Great Wood Academy | Richmond Hill | Online Only | No Association Membership | Visit |
| 416 | Green Road High School | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 429 | Hellenic Academy of York | Richmond Hill | Site based only | No Association Membership | Visit |
| 458 | IntelliBridge Academy | Richmond Hill | Online/Site Based | No Association Membership | — |
| 472 | John Clare High School | Richmond Hill | Online/Site Based | No Association Membership | — |
| 476 | JYN Academy | Richmond Hill | Site based only | No Association Membership | Visit |
| 508 | Lauremont School Upper School | Richmond Hill | Site based only | No Association Membership | Visit |
| 539 | Maplebrook Virtual School | Richmond Hill | Online/Site Based | No Association Membership | — |
| 676 | Quantum Academy | Richmond Hill | Site based only | No Association Membership | Visit |
| 680 | Queen's Glen | Richmond Hill | Site based only | No Association Membership | Visit |
| 681 | Queensland High School | Richmond Hill | | — | Visit |
| 704 | RWS, Richmond Hill World School | Richmond Hill | Online/Site Based | No Association Membership | — |
| 728 | Sophio | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 737 | ST.CUTHBERT CLASSICAL ACADEMY | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 743 | Sunnybrook Secondary School | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 802 | Trinity Academy of Canada | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 803 | Trinity International School | Richmond Hill | Online Only | No Association Membership | Visit |
| 831 | Victoria Academy | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 839 | Warwick Academy | Richmond Hill | Online/Site Based | No Association Membership | — |
| 843 | Ways Ivy Academy | Richmond Hill | Online Only | No Association Membership | Visit |
| 847 | Wellington Academy | Richmond Hill | Online/Site Based | No Association Membership | — |
| 851 | Westview High School | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 852 | Wharton International Academy | Richmond Hill | Online/Site Based | No Association Membership | Visit |
| 876 | Yorkville School - Richmond Hill | Richmond Hill | Online/Site Based | No Association Membership | — |