| A Child's Voice Foundation | Mississauga |
| Ability Online Support Network | Mono |
| AboutFace | North York West |
| Acoustic Neuroma Association of Canada | Toronto |
| Aplastic Anemia and Myelodysplasia Association of Canada | King Township |
| Asperger's Society of Ontario | Toronto Downtown North |
| Asthma Canada | Toronto Downtown North |
| Bob Rumball Canadian Centre of Excellence for the Deaf | Milton |
| Brain Injury Association of Peel and Halton | Mississauga |
| Camp Quality Canada, Camp Quality Southern Ontario, Camp for Children with Cancer and Blood Disorders | Toronto |
| Canada. Health Canada, Ontario Region, First Nations and Inuit Health Branch | Ottawa |
| Canadian Cancer Society - Ontario Division, Cancer Information Service | Toronto Downtown North |
| Canadian Hearing Services, Hamilton Regional Office, Canadian Hearing Services, Canadian Hearing Services Support Groups and Counselling | Hamilton |
| Canadian Hearing Services, Canadian Hearing Services, Mississauga Regional Office | Mississauga |
| Canadian Hemophilia Society, Toronto and Central Ontario Region, Blood Disorders Information and Support | Scarborough North |
| Canadian Liver Foundation, National Office and Toronto/GTA Chapter | Markham |
| CareNow Ontario | North York West |
| CATIE (Canadian AIDS Treatment Information Exchange), Where To? | Toronto Downtown Central |
| Centre for Diverse Learners | Burlington |
| Chai Lifeline Canada | Toronto |
| Childhood Cancer Canada | Toronto Downtown Central |
| Chisholm Academy | Oakville |
| CNIB, Toronto Region, Deafblind Community Services | North York Central |
| COVID-19 Assessment Centres and Testing Options, Halton Region | Halton Region |
| Crohn's and Colitis Canada, Halton Region Chapter | Halton Region |
| DeafBlind Ontario Services | Newmarket |
| Diabetes Canada, D-Camps Ontario | Huntsville |
| Epilepsy South Central Ontario | Mississauga |
| ErinoakKids, Oakville site, Centre for Treatment and Development | Oakville |
| ErinoakKids Centre for Treatment and Development, ErinoakKids Centre for Treatment and Development, Brampton Office | Brampton |
| ErinoakKids Centre for Treatment and Development, Mississauga Office | Mississauga |
| Ernest C Drury School for the Deaf | Milton |
| Foxfield Stable Therapeutic Horsemanship, Therapeutic Riding Centre | Milton |
| Halton Healthcare, Oakville Trafalgar Memorial Hospital, Health Information Centre | Oakville |
| Halton. Halton Region Public Health, Immunization Services | Oakville |
| Halton. Halton Region Public Health, School Years Health | Oakville |
| Halton. Social and Community Services - Children's Services, Children's Developmental Services | Oakville |
| Hemophilia Ontario | Scarborough North |
| Hydrocephalus Canada | Etobicoke Central |
| Jennifer Ashleigh Children's Charity | Uxbridge |
| Kids' Health Links Foundation | Oakville |
| Leukemia and Lymphoma Society of Canada - Ontario Region | North York East |
| Leukemia and Lymphoma Society of Canada - Ontario Region - First Connection Peer Support | North York East |
| Lung Health Foundation | North York East |
| Lyme Ontario | Ancaster |
| LymeHope | Burlington |
| Lymphedema Association of Ontario | Etobicoke South |
| MedicAlert Foundation Canada | North York East |
| Melanoma Canada | Oakville |
| Mind Forward Brain Injury Services | Mississauga |
| MitoCanada Foundation | Oakville |
| MS Canada | Toronto Downtown Central |
| National Eating Disorder Information Centre | Toronto Downtown Central |
| Ontario Federation for Cerebral Palsy | North York Central |
| Ontario Prader-Willi Syndrome Association | York |
| Ontario. Ministry of Children, Community and Social Services, Special Services, Enhanced Respite and Assistance for Children with Disabilities (Mississauga), Mississauga - Central Region | Mississauga |
| Ontario. Ministry of Health, Trillium Drug Program | Etobicoke |
| Ontario. Ministry of Health, Health811 | Toronto Downtown Central |
| Osteoporosis Canada | North York East |
| Ovarian Cancer Canada | Toronto Downtown Central |
| PKD Foundation of Canada | Etobicoke Central |
| Scleroderma Society of Ontario, Scleroderma Society of Ontario Support Groups | Hamilton |
| Sensity Deafblind and Sensory Support Network of Canada, Paris - Main St, Deafblind and Sensory Support Services | Paris |
| Sickle Cell Awareness Group of Ontario | North York |
| Silent Voice Canada | Toronto Downtown North |
| Spinal Cord Injury Ontario | North York Central |
| Tourette Canada, Hamilton, Halton and Niagara Region Chapter | Burlington |
| Variety Village | Toronto |
| Vision Loss Rehabilitation Ontario, Halton-Peel Region, Mississauga Office | Brampton |
| War Amps (The), National Headquarters | Ottawa |
