| Adoption Council of Ontario | Toronto |
| Alcohol and Gaming Commission of Ontario, Head Office | Toronto |
| Canadian Mental Health Association. Simcoe County Branch, Community Awareness Program | Barrie |
| Canadian Mental Health Association. Simcoe County Branch, Early Psychosis Intervention | Barrie |
| Canadian Mental Health Association. Simcoe County Branch, Barrie - 134 Anne St S, Housing Support | Barrie |
| Canadian Mental Health Association. Simcoe County Branch, RSVP Clubhouse, Barrie - Mailing Address | Barrie |
| Canadian Red Cross - Simcoe Muskoka, Simcoe Muskoka Branch, Prevention and Safety, First Aid, CPR, Water Safety, Psychological First Aid | Barrie |
| Children's Mental Health Ontario | Toronto |
| College of Psychologists of Ontario (The) | Toronto Downtown North |
| College of Registered Psychotherapists of Ontario | Toronto Downtown |
| Collingwood Collegiate Institute, Support for Youth and their Families | Collingwood |
| Couchiching Family Health Organization, Worry Warriors, Orillia - Memorial Ave | Orillia |
| Family Mental Health Initiative of Simcoe County | Barrie |
| Georgian Bay Family Health Team | Collingwood |
| Georgian College, Orillia Campus, Student Success - Mental Health and Wellness | Orillia |
| Glowing Hearts Charity, Barrie, Mental Health Counselling | Barrie |
| Kinark Child and Family Services, Barrie - Murray St, Autism Services - Centre-based Applied Behavioural Analysis (ABA) | Barrie |
| Lesbian Gay Bi Trans YouthLine, Text and Chat YouthLine | Toronto |
| Murray's Windermere Gardens | Barrie |
| National Eating Disorder Information Centre | Toronto Downtown Central |
| North Simcoe Youth Wellness Hub, North Simcoe | Midland |
| Patient/Client and Family Council, Midland Health Hub, Family Support | Midland |
| Patient/Client and Family Council, Waypoint Centre, Family Support | Penetanguishene |
| Play Smart Centre, Rama | Chippewas of Rama First Nation |
| Playsmart Centre, Georgian Downs | Innisfil |
| Royal Victoria Regional Health Centre, Barrie - 201 Georgian Dr - 3rd Floor, Community Treatment Order Coordination Service | Barrie |
| Simcoe County Suicide Awareness Council, No Physical Address | Barrie |
| Simcoe County, Corporation of, Children and Community Services - Simcoe County Early Intervention Services | Midland |
| Simcoe Muskoka Regional Eating Disorder Program, Royal Victoria Regional Health Centre | Barrie |
| Simcoe Peer Support for Mental Health and Addictions, Collingwood | Collingwood |
| Simcoe Peer Support for Mental Health and Addictions, People Supporting People, Collingwood | Collingwood |
| South Georgian Bay Community Health Centre, Wasaga Beach, Community Programs | Wasaga Beach |
| Stevenson Memorial Hospital, Mary McGill Community Mental Health Program | New Tecumseth |
| WES For Youth Online, E-Counselling Mental Health Support Services | Brockton |
| YMCA of Simcoe/Muskoka, Barrie - Bayfield St, Youth Gambling Awareness Program | Barrie |
| Your Support Services Network, Aurora - Head Office | |