| Adoption Council of Ontario, Markham - Mailing Address | Markham |
| Central Registry, Caregiver ReCharge | Oakville |
| 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 |
| College of Early Childhood Educators, Toronto, Registered Early Childhood Educators | Toronto |
| Communication Disabilities Access Canada, Toronto - Online Service | Toronto |
| Community Living North Halton | Milton |
| Community Living Oakville | Oakville |
| Developmental Services Ontario Central West Region, Access to Services and Supports for Individuals with a Developmental Disability | Milton |
| ErinoakKids, Oakville site, Centre for Treatment and Development | Oakville |
| Halton Children's Aid Society, Burlington Office | Burlington |
| Halton Children's Aid Society, Milton Office | Milton |
| Halton. Social and Community Services - Children's Services, Child Care Services | Oakville |
| Halton. Social and Community Services - Children's Services, Children's Developmental Services and Family Supports | Oakville |
| Home Child Care Association of Ontario, Website Only | Toronto |
| ICNA Relief Canada, Muslim Family Services | Mississauga |
| Milestone Foster Homes, Foster Parent Recruitment and Education | Burlington |
| Nucleus Independent Living | Oakville |
| Ontario Community Support Association, Toronto | Toronto |
| Ontario Health atHome, Etobicoke Office | Etobicoke Central |
| Ontario Health atHome, Burlington Office | Burlington |
| Ontario Health atHome, Milton Office | Milton |
| Ontario Health atHome, Mississauga Office | Mississauga |
| The Halton Resource Connection, Child Care Directory and Information Line | Milton |
