| Aktion Club, Stratford Branch | Stratford |
| Architectural Conservancy of Ontario, Stratford-Perth County Branch | Stratford |
| Asperger's Society of Ontario | Toronto Downtown North |
| Association of Day Care Operators of Ontario (The) | St Catharines |
| Beef Farmers of Ontario, No Physical Address - Perth County | |
| Blyth Brussels Minor Hockey Association | Huron East |
| Canadian Association of Farm Advisors | Stratford |
| College of Audiologists and Speech Language Pathologists of Ontario | Toronto Downtown North |
| College of Dental Technologists of Ontario | Scarborough |
| College of Early Childhood Educators | Toronto |
| College of Physicians and Surgeons of Ontario | Toronto Downtown Central |
| College of Psychologists of Ontario (The) | Toronto Downtown North |
| College of Registered Psychotherapists of Ontario | Toronto Downtown |
| Community Living North Perth | North Perth |
| Community Living St Marys and Area, St Marys and Area | St Marys |
| Community Living Stratford and Area | Stratford |
| Dietitians of Canada | Toronto Downtown Central |
| Huron Perth Association of REALTORS® | Stratford |
| Insurance Bureau of Canada, Ontario Head Office, Consumer Information Centre | Toronto |
| Jersey Club - Perth Huron, No Physical Address | Milverton |
| Kirkton Agricultural Society, Kirkton Fall Fair | West Perth |
| L'Arche Stratford | Stratford |
| Listowel Agricultural Society | North Perth |
| Listowel Minor Baseball Association | North Perth |
| Listowel Minor Hockey Association | North Perth |
| Milverton Agricultural Society, Milverton Agri Centre | Perth East |
| Minor Hockey Alliance of Ontario | Stratford |
| Mitchell & District Agricultural Society | West Perth |
| Mitchell Minor Sports | West Perth |
| Ontario Canola Growers' Association | Grey Highlands |
| Ontario College of Trades | Toronto Downtown |
| Ontario Dental Association | Toronto Downtown North |
| Ontario Federation for Cerebral Palsy | Etobicoke North |
| Ontario Federation of Teaching Parents | Ontario |
| Ontario Woodlot Association, Huron Perth Chapter | Stratford |
| Perth County Holstein Club | Stratford |
| Perth County Plowmen's Association | Stratford |
| Perth-Huron Builders Association, Mailing Address | Stratford |
| Sebringville Athletic Association | Perth East |
| Shakespeare & Community Athletic Association, Mailing Address | Perth East |
| Soil and Crop Improvement Association, Mailing Address Only - Perth County | Perth County |
| St Marys Minor Ball Association, Mailing Address | St Marys |
| Stratford & District Agricultural Society, Burnside Agriplex | Stratford |
| Stratford and District Labour Council | Stratford |
| Stratford Basketball Association, Mailing Address Only | Stratford |
| Stratford Children's Services | Stratford |
| Stratford Minor Baseball Association | Stratford |
| Stratford Minor Girls Hockey Association, Mailing Address Only | Stratford |
| Stratford Minor Hockey Association, Mailing Address Only | Stratford |
| Stratford Musicians' Association, American Federation of Musicians Local 418 | St Marys |
| Stratford Perth Centre for Business | Stratford |
| Stratford Skills Series, No Physical Address | Stratford |
| Western Ontario Athletic Association | North Huron |
| Wingham Minor Hockey Association | North Huron |