| Canadian Coalition for Seniors' Mental Health, Markham | Markham |
| Canadian Mental Health Association, Oakville - Halton Region Branch Head Office, Mental Health Services | Oakville |
| Canadian Mental Health Association, Education and Training | Oakville |
| Canadian Mental Health Association, Mobile Outreach Team - COAST - Crisis Outreach and Support Team | Oakville |
| Canadian Mental Health Association, Milton and Halton Hills, Mental Health Services | Milton |
| Canadian Mental Health Association, National, Toronto - Online/Web Service, Mental Health Resources | Toronto |
| CarePoint Health, Brampton-Halton-Mississauga-South Etobicoke, Ontario Structured Psychotherapy Program | Mississauga |
| Centre for Addiction and Mental Health, CAMH Support Resources and Information Services | Toronto |
| ConnexOntario, Helpline | London |
| Halton Healthcare, Acton, North Halton Mental Health Clinic | Acton |
| Halton Healthcare, Georgetown, North Halton Mental Health Clinic | Georgetown |
| Halton Healthcare, Milton District Hospital, Outpatient Mental Health Urgent Care Clinic | Milton |
| Halton Healthcare, Milton, North Halton Mental Health Clinic | Milton |
| Halton Healthcare, Mississauga Halton Central Intake Program | Oakville |
| Halton Healthcare, Mississauga Halton Central Intake Program - one-Link - Addictions and Mental Health Services Referral | Oakville |
| Halton Healthcare, Oakville Trafalgar Memorial Hospital, Mental Health - Outpatient Services | Oakville |
| Halton Healthcare, Oakville Trafalgar Memorial Hospital, Mental Health - Psychiatric Consultation | Oakville |
| Halton Healthcare, Oakville Trafalgar Memorial Hospital, Mental Health Day Program | Oakville |
| Halton Healthcare, Oakville Trafalgar Memorial Hospital, Outpatient Mental Health Urgent Care Clinic | Oakville |
| How to Find - Crisis and Distress Services, Halton Region | Halton Region |
| Joseph Brant Hospital, Burlington, Mental Health Services | Burlington |
| Mental Health Mutual-Aid Hub Canada, Mandarin Hotline and Mental Health Support | Toronto |
| Mood Disorders Association of Ontario, Peer Supports and Services | Toronto |
| Psychiatric Patient Advocate Office, Patient Advocacy, Education and Information | Toronto |
| St Joseph's Healthcare Hamilton, Burlington Locations, Ontario Structured Psychotherapy West Region | Burlington |
| Support House, Housing Services | Oakville |
| Support House, Peer Services - Centre for Innovation in Peer Support | Oakville |
