| | Organization Name(s) | Located In |
| | Canada. Social Development Canada. Human Resource Centre, ISP Forms | Canada |
| | C.A.R.E. Stratford | Stratford |
| | Call Dennis! | Stratford |
 | Calvary United Church | Listowel |
 | Camp Big Canoe | Bracebridge |
 | Camp Bimini | Perth South |
 | Camp Crossroads | Muskoka Lakes Township |
 | Camp Tamarack | Bracebridge |
 | Canada Mortgage and Housing Corporation. Hamilton Office | Hamilton |
| | Canada Post Corporation, Letters to Santa Claus | Canada |
 | Canada Post Corporation, Retail Postal Outlet, Blowes Office Supplies Stratford | Stratford |
| | Canada Post Corporation, Retail Postal Outlet, E and E's Cloth and Creations Newton | Perth East |
 | Canada Post Corporation, Retail Postal Outlet, M and M Variety St Marys | St Marys |
 | Canada Post Corporation, Retail Postal Outlet, Shakespeare Video and Variety Shakespeare | Shakespeare |
 | Canada Post Corporation, Retail Postal Outlet, Shoppers Drug Mart Stratford | Stratford |
 | Canada Post Corporation, Retail Postal Outlet, The Bare Necessities Fordwich | Howick |
 | Canada Post Corporation, Retail Postal Outlet, Winthrop General Store Seaforth | Seaforth |
 | Canada Post Corporation. Atwood Branch | Atwood |
 | Canada Post Corporation. Bornholm Branch | West Perth |
 | Canada Post Corporation. Brodhagen Branch | West Perth |
 | Canada Post Corporation. Brunner Branch | Brunner |
 | Canada Post Corporation. Dublin Branch | Dublin |
 | Canada Post Corporation. Gads Hill Branch | Perth East |
 | Canada Post Corporation. Gowanstown Branch | North Perth |
 | Canada Post Corporation. Kirkton Branch | South Huron |
 | Canada Post Corporation. Listowel Branch | Listowel |
 | Canada Post Corporation. Milverton Branch | Milverton |
 | Canada Post Corporation. Mitchell Branch | Mitchell |
 | Canada Post Corporation. Monkton Branch | Monkton |
 | Canada Post Corporation. Poole Branch | Perth East |
 | Canada Post Corporation. Rostock Branch | Perth East |
 | Canada Post Corporation. Sebringville Branch | Sebringville |
 | Canada Post Corporation. St Marys Branch | St Marys |
 | Canada Post Corporation. Stratford Branch | Stratford |
| | Canada Post Corporation. Woodham Branch | South Huron |
 | Canada-Ontario Affordable Housing Program | Stratford |
 | Canada-Ontario Business Service Centre (The) | Toronto |
 | Canada. Canada Revenue Agency, Child Tax Benefits | Sudbury |
 | Canada. Canada Revenue Agency, London Tax Services Office | London |
 | Canada. Canadian Food Inspection Agency, Animals, Importation and Exportation, Rabies, Mitchell District Office | Mitchell |
 | Canada. Department of National Defence, Canadian Armed Forces, Royal Canadian Regiment, Tango Company - 4th Battalion | Stratford |
 | Canada. Department of National Defence, Canadian Forces, Recruiting Centre Stratford | Stratford |
 | Canada. Environment Canada. Meteorological Service of Canada, Ontario Storm Prediction Centre | Toronto |
 | Canada. Health Canada, Healthy Environments and Consumer Safety Branch, Product Safety Programme | Toronto |
 | Canada. Health Canada. Ontario Regional Office, General Inquiries Line | Toronto |
 | Canada. House of Commons. Perth-Wellington, Member of Parliament, Schellenberger, Gary | Stratford |
| | Canada. Human Resources and Skills Development Canada, Registred Disability Savings Plan | Canada |
 | Canada. Industry Canada. Ontario Regional Office | Toronto |
 | Canada. Service Canada. Service Canada Centre, Centre for Youth | Stratford |
 | Canada. Service Canada. Service Canada Centre, Listowel | Listowel |
 | Canada. Service Canada. Service Canada Centre, Stratford | Stratford |
 | Canada. Statistics Canada, Ontario Region, Advisory Services | Toronto |
| | Canada. Transport Canada, Office of Boating Safety, Pleasure Craft Operator Card | Ottawa |
 | Canada. Veterans Affairs Canada. District Office | Mississauga |
 | Canadian Addison Society, National Office | Goderich |
| | Canadian Association of Farm Advisors, Southwestern Ontario Chapter | Perth County |
 | Canadian Baseball Hall of Fame and Museum | St Marys |
 | Canadian Blood Services. Ottawa Head Office | Ottawa |
 | Canadian Breast Cancer Foundation, Ontario Region | Toronto |
 | Canadian Broadcasting Corporation | Toronto |
 | Canadian Cancer Society, Huron-Perth Unit | Stratford |
 | Canadian Cancer Society. Hamilton, Smokers Helpline | Hamilton |
 | Canadian Centre for Victims of Torture | Toronto |
| | Canadian Cystic Fibrosis Foundation, Huron Oxford Perth Chapter | Listowel |
 | Canadian Diabetes Association, London Branch | London |
 | Canadian Diabetes Association. Ontario Division, Clothesline Donations | Toronto |
| | Canadian Federation of University Women, CFUW Stratford Club | Stratford |
 | Canadian Liver Foundation | Toronto |
 | Canadian MedicAlert Foundation | Toronto |
 | Canadian Mental Health Association, Huron-Perth Branch, Community Support Program, Seaforth | Seaforth |
 | Canadian Mental Health Association, Huron-Perth Branch, Consumer Peer Support Initiative, Stratford | Stratford |
 | Canadian Mental Health Association, Huron-Perth Branch, Court Support & Diversion Program, Stratford | Stratford |
 | Canadian Mental Health Association, Huron-Perth Branch, Housing Programs, Stratford | Stratford |
 | Canadian Mental Health Association, Huron-Perth Branch, Seaforth | Seaforth |
 | Canadian Mental Health Association, Huron-Perth Branch, Stratford | Stratford |
| | Canadian Parents for French, Stratford Chapter | Stratford |
| | Canadian Parents for French, Stratford Chapter, Adult French Course | Stratford |
 | Canadian Red Cross, Huron-Perth Branch | Stratford |
 | Canadian Red Cross, Huron-Perth Branch, Disaster Services | Stratford |
 | Canadian Red Cross, Huron-Perth Branch, First Aid and Safety Services | Stratford |
 | Canadian Red Cross, Huron-Perth Branch, International Programs | Stratford |
 | Canadian Red Cross, Huron-Perth Branch, On Board / Water Safety Services | Stratford |
 | Canadian Red Cross, Huron-Perth Branch, Respect ED Violence & Abuse Prevention | Stratford |
 | Canadian Red Cross, Huron-Perth Branch, Volunteer Resources Management Course | Stratford |
 | Canadian Tire Jumpstart Charities | Toronto |
| | Canadian Virtual University / L'Universite Virtuelle Canadienne | Canada |
 | CarePartners, Perth County | Stratford |
 | Caressant Care Listowel Nursing and Retirement Home | Listowel |
 | Carman's foto source, Stratford | Stratford |
 | CARP | Toronto |
 | Cartwright Chiropractic | Mitchell |
 | Cattle Feeders - Huron/Perth | Brussels |
| | CBEAC - Civic Beautification and Environmental Awareness Committee | Stratford |
| | Cecilia Lara Nutrition Consulting | Stratford |
 | Cedarcroft Place Retirement Residence | Stratford |
| | Central Perth Elementary School | Perth East |
 | Central United Church, Stratford | Stratford |
 | Centre for Addiction and Mental Health. Toronto | Toronto |
 | Centre for Employment and Learning, Adult Learning Program | Listowel |
 | Centre for Employment and Learning, English as a Second Language Program / High School Credit Program / Computer Lab, Stratford | Stratford |
 | Centre for Employment and Learning, Stratford | Stratford |
 | Centre For Equality Rights In Accommodation | Toronto |
 | Cheshire Homes of London | London |
 | Chicken Farmers of Ontario | Burlington |
 | Child and Parent Resource Institute | London |
 | Children's Hospital, London Health Sciences Centre, Child and Adolescent Mental Health Care Program, Eating Disorders Services | London |
 | Children's Mental Health Ontario (CMHO) | Toronto |
 | Chiropractic Health Centre | Stratford |
 | Choices for Change: Alcohol, Drug and Gambling Counselling Centre | Stratford |
 | Choices for Change: Alcohol, Drug and Gambling Counselling Centre, Crossing Bridges Youth | Stratford |
 | Choices for Change: Alcohol, Drug and Gambling Counselling Centre, Listowel | Listowel |
| | Choices for Change: Alcohol, Drug and Gambling Counselling Centre, Mitchell | Mitchell |
 | Choices for Change: Alcohol, Drug and Gambling Counselling Centre, St Marys | St Marys |
 | Christ Anglican Church, Listowel | Listowel |
| | Christian Farmers Federation, Perth County | Stratford |
 | Christian Horizons.South District Office, Bruce, Grey County | London |
| | Christian Life - Church of God | Stratford |
 | Christian Reformed Church, Stratford | Stratford |
 | Christian Reformed Church, Stratford, Boys Cadets | Stratford |
 | Christian Reformed Church, Stratford, Gems | Stratford |
 | Christian Resource Centre for Huron-Perth Presbytery | Mitchell |
| | Christopher Leadership Course | Stratford |
 | Chung Oh's School of Tae Kwon Do, Listowel Tae Kwon Do | Listowel |
 | Chung, Dr S Y - Dentist | Stratford |
 | Church of Jesus Christ of Latter Day Saints, Stratford | Stratford |
 | City Cabs | Stratford |
 | CKNX Radio, AM920 CKNX Information Country | Wingham |
 | CKNX Radio, FM101.7 The One | Wingham |
 | CKNX Radio, FM94.5 The Bull | Wingham |
| | Clandestine Woman's Book and Film Club | Stratford |
| | Clarence Home Improvements | Seaforth |
 | Cleto, Dr Luis - Psychiatrist | Stratford |
 | Clothing Loft | Listowel |
 | cnib, Ontario Division, Southwest Office | London |
 | cnib, Ontario Division, Southwest Office, Assistive Devices Store | London |
 | cnib, Ontario Division, Southwest Office, Career Development and Employment | London |
 | cnib, Ontario Division, Southwest Office, Low Vision Clinic | Stratford |
 | Coaching Room (The) | London |
 | College of Audiologists and Speech-Language Pathologists of Ontario | Toronto |
 | College of Chiropodists of Ontario | Toronto |
 | College of Chiropractors of Ontario | Toronto |
 | College of Dental Hygienists of Ontario | Toronto |
 | College of Denturists of Ontario | Toronto |
 | College of Dietitians of Ontario | Toronto |
 | College of Massage Therapists of Ontario | Toronto |
 | College of Medical Laboratory Technologists of Ontario | Toronto |
 | College of Medical Radiation Technologists of Ontario | Toronto |
 | College of Midwives of Ontario | Toronto |
 | College of Nurses of Ontario | Toronto |
 | College of Occupational Therapists of Ontario | Toronto |
 | College of Opticians of Ontario | Toronto |
 | College of Optometrists of Ontario | Toronto |
 | College of Physicians and Surgeons of Ontario | Toronto |
 | College of Physiotherapists of Ontario | Toronto |
 | College of Psychologists of Ontario | Toronto |
 | College of Respiratory Therapists of Ontario | Toronto |
 | Colorectal Cancer Association of Canada | Toronto |
| | Coloured Bean Growers' Association | Mitchell |
| | Comancheros Car Club | Listowel |
 | Community Futures Development Corporation, Perth County | Milverton |
 | Community Legal Education Ontario | Toronto |
 | Community Legal Education Ontario, Your Rights Your Language | Toronto |
 | Community Living, St Marys and Area | St Marys |
 | Community Living, Stratford and Area | Stratford |
| | Community Living North Perth | Listowel |
 | Community of Christ | Stratford |
 | Community Outreach Services | Milverton |
 | Community Outreach Services - Milverton, Information and Referral | Milverton |
 | Community Outreach Services - Milverton, Meals on Wheels | Milverton |
 | Community Outreach Services - Milverton, VISITING- Volunteer Visiting and Telephone Reassurance | Milverton |
 | Community Outreach Services and Knollcrest Lodge, Community Outreach Transportation | Milverton |
 | Community Outreach Services and Knollcrest Lodge, Foot Care Clinic | Milverton |
 | Community Outreach Services and Knollcrest Lodge, Seniors Day Out and Dining Programs | Milverton |
 | Community Outreach Services and Knollcrest Lodge, SWIFT Gentle Exercises & Walking Club | Milverton |
 | Community Outreach Services and Knollcrest Lodge, Volunteer Transportation | Milverton |
 | Community Services Coordination Network, Huron/Perth | Seaforth |
 | Community Stroke Rehabilitation Team | London |
 | Concerned Friends of Ontario Citizens in Care Facilities | Toronto |
 | Conestoga College Institute of Technology and Advanced Learning, Conestoga Career Centre | Stratford |
 | Conestoga College Institute of Technology and Advanced Learning, GED Pre-test and Exam | Stratford |
 | Conestoga College Institute of Technology and Advanced Learning, Literacy and Basic Skills and Academic Upgrading Program | Stratford |
 | Conestoga College Institute of Technology and Advanced Learning, Ontario Employment Services | Stratford |
 | Conestoga College Institute of Technology and Advanced Learning, Stratford Campus | Stratford |
 | Conestoga College Institute of Technology and Advanced Learning, Summer Jobs Service, SJS | Stratford |
| | ConnexOntario Health Services Information | London |
| | ConnexOntario Health Services Information, Drug and Alcohol Registry of Treatment [The] | London |
| | ConnexOntario Health Services Information, Mental Health Service Information Ontario (MHSIO) | London |
| | ConnexOntario Health Services Information, Ontario Problem Gambling Helpline [The] | London |
| | Conservative Party of Canada, Perth - Wellington Federal Conservative Association | Perth County |
 | Cornerstone Christian Fellowship | Stratford |
| | Cornerstone Horse Farm | Perth East |
 | Coronation Dental Specialty Group, Stratford | Stratford |
 | Country Meadows Retirement Home | Brunner |
| | Countryside Energy Co-operative | Milverton |
 | Countryside Midwifery Services | Milverton |
| | Countryview Retirement Residence | Listowel |
 | Coventry Animal Hospital | Stratford |
 | Credit Risk Management, Regional Reporting Centre | Stratford |
| | Crime Stoppers of Perth County | Seaforth |
 | Crohn's and Colitis Foundation of Canada | Toronto |
| | Cromarty Minor Fastball | West Perth |
| | Cromarty Presbyterian Church | West Perth |
| | Cross County Patient Transfer | Owen Sound |
| | Cross Cultural Learner Centre | London |
| | Cross Cultural Learner Centre, Library and Resources | London |
| | Cross Cultural Learner Centre, Translation Services | London |
 | Cruz, Dr Norman - Family Doctor | Stratford |
 | Curves, Listowel | Listowel |
 | Curves, Mitchell | Mitchell |
 | Curves, Stratford | Stratford |