| ABR Autism Services of Northumberland | Cobourg |
| Acoustic Neuroma Association of Canada | Toronto |
| ALS Canada, Mailing Address, ALS Canada Community Services | Barrie |
| Alzheimer Society, Peterborough Office, Peterborough, Kawartha Lakes, Northumberland and Haliburton | Peterborough |
| Alzheimer Society Huron Perth, Stratford Office, Alzheimer Society Huron Perth - Stratford Office | Stratford |
| Alzheimer Society Huron Perth, Support Groups - Huron and Perth, Mailing Address Only | Central Huron |
| Alzheimer Society of Dufferin County | Orangeville |
| Alzheimer Society of Grey-Bruce | Owen Sound |
| Alzheimer Society of Muskoka | Bracebridge |
| Alzheimer Society of Muskoka, First Link Program | Bracebridge |
| Arthritis Society Canada, Owen Sound - Grey and Bruce Region, Arthritis Society Canada - Grey and Bruce Region | Owen Sound |
| Autism Ontario [Central East] | Toronto |
| Brain Injury Association of London and Region - Perth Huron, Avondale United Church, Perth County Social Leisure Group | Stratford |
| Brain Injury Association of London and Region - Perth Huron, Libro Community Hall, Huron County Support Group | Clinton |
| Brain Injury Association of London and Region - Perth Huron, Local Community Food Centre, Perth County Support Group | Stratford |
| Breaking Down Barriers, Independent Living Resource Centre, Peer Support Program, Independent Living Skills, Information and Referral | Collingwood |
| Canadian Alopecia Areata Foundation | King Township |
| Canadian Angelman Syndrome Foundation, Canadian Angelman Syndrome Society | Edmonton |
| Canadian Celiac Association, Grey Bruce Celiac Support Group | Kincardine |
| Candlelighters Simcoe - Parents of Children with Cancer, Barrie - Mailing Address | Barrie |
| Canopy Support Services, Peterborough, Autism Services | Peterborough |
| Canopy Support Services, Peterborough, Fetal Alcohol Spectrum (FASD) | Peterborough |
| Chronic Pain, Fibromyalgia, Arthritis and Long Haul COVID Support Group | Goderich |
| CNIB Simcoe / Muskoka, Midland, Penetanguishene, Orillia, and Barrie, Beyond Vision Loss Group | Barrie |
| Cobourg Ostomy Support Group of Northumberland | Cobourg |
| Community Care City of Kawartha Lakes, Hospice Services - Living With Cancer Support Group, Lindsay - 2 Kent St W | Lindsay |
| Cystic Fibrosis Canada, Huron Oxford Perth Chapter | North Perth |
| Cystic Fibrosis Canada, Peterborough - Mailing Address, Peterborough and District Chapter | Peterborough |
| Down Syndrome Association of Simcoe County, Mailing Address | Barrie |
| Endometriosis Network Canada | Canada |
| Fragile X Research Foundation of Canada | Brampton |
| Friends (The), Parry Sound, Community and Health Care Services, Parry Sound | Parry Sound |
| Gilda's Club Simcoe Muskoka | Barrie |
| Haliburton Highlands Health Services, Community Support Services Division - Adult Day Program, Haliburton - 7185 Gelert Road | Haliburton |
| Hemophilia Ontario | Scarborough North |
| Huntington Society of Canada, Peterborough Chapter, Huntington Disease Resource Centre, East Central Ontario Region | Peterborough |
| Huntsville Breast Cancer Support Group, Huntsville | Huntsville |
| Huron Perth Healthcare Alliance, Community Stroke Rehabilitation Team - Moving Forward With Stroke Program, Avondale United Church | Stratford |
| Kawartha Lakes Autism Support, Kennedy Place | Kawartha Lakes |
| Life After Stroke, Peterborough, Life After Stroke Peterborough | Peterborough |
| Lupus Ontario, Online/Web Service, Online Support Group | |
| ME / FM Association of Peterborough and District, Peterborough | Peterborough |
| Moose Deer Point First Nation, Mactier - 1025C Mitawbik Rd, Health Services | Georgian Bay Township |
| MS Canada, Durham Northumberland - Mailing Address, Durham Northumberland | Cobourg |
| MS Canada, Mailing Address, Barrie Support Group | Barrie |
| MS Canada, Online/Web Service, Virtual Support Groups | |
| MS Canada | Toronto |
| Muskoka Family Network, Muskoka District - No physical address | |
| Muskoka Tourette Syndrome Resource Unit, Bracebridge, Support Group | Bracebridge |
| ONE CARE Home & Community Support Services, Clinton, Adult Day Services, Clinton | Central Huron |
| OPAL Self-help for Physically Challenged | West Perth |
| Osteoporosis Canada [Central East], Peterborough | Peterborough |
| Parkinson Canada, Support Groups | Barrie |
| Parkinson Canada, Bracebridge - South Muskoka Support Group, Support Groups | Bracebridge |
| Parkinson Canada, Brighton, Support Groups | Brighton (Municipality of) |
| Parkinson Canada, Cobourg / Port Hope - Northumberland Support Group, Support Groups | Cobourg |
| Parkinson Canada, Collingwood, Support Groups | Collingwood |
| Parkinson Canada, Midland - North Simcoe Parkinson Support Group, Support Groups | Midland |
| Parkinson Canada, Orillia Parkinson Support Group, Support Groups | Orillia |
| Parkinson Canada, Peterborough, Support Groups | Peterborough |
| Peterborough and Central Region Post Polio Support Group | Selwyn Township |
| Peterborough Regional Health Centre, Pediatric Diabetes Education Centre | Peterborough |
| ProActive Rehab & Sport Injury Centre, Brain Injury Survivor Support Group | Huntsville |
| Prostate Cancer Support Group Peterborough | Peterborough |
| Spinal Cord Injury Ontario [Central East], Warsaw - Mailing Address, Peterborough Regional Office | Douro-Dummer |
| Stratford and District Ostomy Association | Stratford |
| Stroke Recovery Association Barrie and District | Barrie |
| Support Group for Family and Friends of People With Brain Injuries | Port Hope (Municipality of) |
| Survivor Thrivers Dragon Boat Society | Cobourg |
| Tourette Canada, Peterborough and Kawartha Lakes Area Contact | Peterborough |
| Trinity Anglican Church, Bradford | Bradford West Gwillimbury |
| We Are Warriors! - Canadian MS Collective, Online / Web Service | Canada |
| Wellspring Stratford Cancer Support Centre | Stratford |