| AccessOAP | Toronto |
| Ausum Charity for Autism | Streetsville |
| Autism Ontario, Halton Chapter - Mailing Address | Burlington |
| Autism Ontario | Toronto Downtown |
| Central West Specialized Developmental Services, Developmental Services | Oakville |
| Central West Specialized Developmental Services, Halton Support Services | Oakville |
| Central West Specialized Developmental Services, Respite Services | Oakville |
| Centre for Diverse Learners | Burlington |
| ClearView Church | Oakville |
| Community Living Burlington | Burlington |
| Community Living North Halton | Milton |
| Community Living North Halton, Services for Children and Youth | Milton |
| Community Living Oakville | Oakville |
| Community Living Oakville, Oakville, Supported Living | Oakville |
| ErinoakKids Centre for Treatment and Development, Mississauga, Children's Treatment Centre | Mississauga |
| Geneva Centre for Autism | Toronto Downtown |
| Halton. Social and Community Services - Children's Services, Children's Developmental Services and Family Supports | Oakville |
| Jake's House, Autism Services | Mississauga |
| Joy of Learning, Child Development and Private Educational Services | Oakville |
| Kerry's Place, Kennedy Mississauga Resource Centre | Mississauga |
| March of Dimes Canada (GTA), Community Support Services (Toronto) | Toronto |
| Milton Autism | Milton |
| Ontario Autism Coalition | Ontario |
| Ontario Federation for Cerebral Palsy | Etobicoke |
| Ontario. Ministry of Children, Community and Social Services, Ontario Autism Program | Toronto |
| Project Autism Canada | Halton Region |
| ROCK, Autism and Behavioural Services | Halton Region |
| SocialliiASD | Burlington |
| Special Olympics Ontario - Halton Region, Halton Hills Community, Special Olympics Ontario | Halton Hills |
| Special Olympics Ontario - Halton Region, Burlington Community - Mailing Address, Special Olympics Ontario | Burlington |
| Special Olympics Ontario - Halton Region, Milton Community, Special Olympics Ontario | Milton |
| Special Olympics Ontario - Halton Region, Oakville Community - Mailing Address, Special Olympics Ontario | Oakville |
| Wildwood Academy | Oakville |
| Woodview Mental Health and Autism Services | Burlington |
| Woodview Mental Health and Autism Services, Woodview Learning Centre | Burlington |
