| Canadian Mental Health Association, York Region and South Simcoe, CMHA Alliston | New Tecumseth |
| Canadian Mental Health Association. Simcoe County Branch, Barrie - 21 Bradford St, Assertive Community Treatment Team | Barrie |
| Canadian Mental Health Association. Simcoe County Branch, Collingwood - 186 Erie St - Suite 101, Assertive Community Treatment Team | Collingwood |
| Canadian Mental Health Association. Simcoe County Branch, Orillia - 76 Nottawasaga St, Assertive Community Treatment Team | Orillia |
| Huron Perth Healthcare Alliance, Mental Health Services - Huron Perth Assertive Community Treatment Team, Seaforth - 28 Centennial Dr | Huron East |