| AccessOAP | Toronto |
| Autism Ontario, Halton Chapter - Mailing Address | Burlington |
| Autism Ontario | Toronto Downtown West |
| Central West Specialized Developmental Services, Halton Support Services | Oakville |
| Community Living North Halton | Milton |
| ErinoakKids Centre for Treatment and Development, Mississauga, Children's Treatment Centre | Mississauga |
| Geneva Centre for Autism | Toronto Downtown North |
| Halton. Social and Community Services - Children's Services, Children's Developmental Services and Family Supports | Oakville |
| Jake's House, Mississauga, Autism Services | Mississauga |
| Joy of Learning, Child Development and Private Educational Services | Oakville |
| Kerry's Place, Kennedy Mississauga Resource Centre | Mississauga |
| Milton Autism | Milton |
| Ontario Autism Coalition | Ontario |
| 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, EmploymentWorks | Burlington |
| Woodview Mental Health and Autism Services | Burlington |
| Woodview Mental Health and Autism Services, Woodview Learning Centre | Burlington |
