| Alliston Business Improvement Association | New Tecumseth |
| Association of Administrative Professionals, Barrie / Simcoe County Branch | Barrie |
| Barrie and Area Ontario Health Team, Barrie - no physical address | Barrie |
| Barrie and District Association of Realtors | Barrie |
| Barrie Region Innovation Xchange, No Physical Address | Barrie |
| Business and Professional Women (BPW) Barrie | Barrie |
| College of Physicians and Surgeons of Ontario | Toronto Downtown Central |
| College of psychologists and behaviour analysts of Ontario (The) | Toronto Downtown North |
| Easter Seals Ontario, Barrie-Simcoe County Office | Barrie |
| Essa and District Agricultural Society, Essa Agriplex | Essa |
| Human Resources Professionals Association, Central West | |
| Insurance Bureau of Canada, Consumer Information Centre | Toronto |
| North Simcoe Muskoka Hospice Palliative Care Network, Orillia, Education and Palliative Pain and Symptom Management Consultations | Orillia |
| Ontario Dental Association | Toronto Downtown North |
| Ontario English Catholic Teachers Association. Simcoe Muskoka Unit | Barrie |
| Ontario Registered Music Teachers Association, Barrie Branch, No Physical Address | Barrie |
| Ontario Secondary School Teachers' Federation, Barrie, Simcoe County District 17 | Barrie |
| SEIU Healthcare | Barrie |
| Simcoe County Federation of Agriculture, Simcoe County Administration Building | Springwater |
| Simcoe County Home Builders' Association | Barrie |
| Simcoe County Young Professionals Association | Barrie |