| Ad Standards, Toronto | Toronto |
| Alcohol and Gaming Commission of Ontario | Toronto |
| Bereavement Authority of Ontario, Toronto | Toronto |
| Canada Post, Online Service, Find a Post Office | Ontario |
| Canada. Canadian Food Inspection Agency, Ontario Area Office | Guelph |
| Canada. Canadian Radio-television and Telecommunications Commission | Ottawa |
| Canada. Crown-Indigenous Relations and Northern Affairs and Indigenous Services, Allegations and Complaints | Gatineau |
| Canada. Innovation, Science and Economic Development, Ontario Region, Toronto, Office of the Superintendent of Bankruptcy, Ontario Region | Toronto |
| Canada. Office of the Federal Ombudsperson for Victims of Crime | Ottawa |
| Canada. Office of the Information Commissioner of Canada | Ottawa |
| Canada. Office of the Privacy Commissioner of Canada, Ottawa | Ottawa |
| Canada. Veterans Affairs Canada [Toronto area], Veterans Ombudsman | Toronto |
| Canada. Veterans Review and Appeal Board, Charlottetown | Charlottetown |
| Canadian Motor Vehicle Arbitration Plan | Toronto |
| Civilian Review and Complaints Commission for the RCMP | Ottawa |
| College of Audiologists and Speech Language Pathologists of Ontario | Toronto Downtown North |
| College of Chiropractors of Ontario | Toronto Downtown Central |
| College of Denturists of Ontario | Toronto Downtown Central |
| College of Dietitians of Ontario | Toronto |
| College of Early Childhood Educators | Toronto |
| College of Immigration and Citizenship Consultants | Burlington |
| College of Massage Therapists of Ontario | Toronto Downtown North |
| College of Naturopaths of Ontario (The) | Toronto Downtown Central |
| College of Nurses of Ontario | Toronto Downtown North |
| College of Occupational Therapists of Ontario | Toronto Downtown Central |
| College of Opticians of Ontario | Toronto Downtown Central |
| College of Physicians and Surgeons of Ontario | Toronto Downtown Central |
| College of Physiotherapists of Ontario | Toronto Downtown Central |
| College of Psychologists of Ontario (The) | Toronto Downtown North |
| College of Registered Psychotherapists of Ontario | Toronto Downtown |
| College of Traditional Chinese Medicine Practitioners and Acupuncturists of Ontario | Markham |
| College of Veterinarians of Ontario | Guelph |
| Commission for Complaints for Telecom-television Services | Ottawa |
| Financial Services Regulatory Authority of Ontario | Toronto |
| Halton Regional Police Service, Public Complaints Process | Halton Region |
| HSR Public Transit, HSR Customer Centre Services | Hamilton |
| Law Enforcement Complaints Agency | Toronto |
| Law Society of Ontario | Toronto |
| National NewsMedia Council | Toronto |
| Office of the Hydro One Ombudsman, Hydro One Services Complaints | Toronto |
| Office of the Taxpayers' Ombudsperson | Ottawa |
| OmbudService for Life and Health Insurance, Online Services | Toronto |
| Ombudsman for Banking Services and Investments, Toronto | Toronto |
| Ombudsman Ontario, Children and Youth Unit | Toronto |
| Ombudsman Ontario | Toronto |
| Ontario College of Pharmacists | Toronto Downtown North |
| Ontario College of Social Workers and Social Service Workers | Toronto Downtown North |
| Ontario College of Teachers | Toronto |
| Ontario Energy Board, Consumer Relations | Toronto |
| Ontario Judicial Council, Toronto - Mailing Address | Toronto |
| Ontario Ministry of Municipal Affairs and Housing, Landlord and Tenant Board Southern Office, Ontario Landlord and Tenant Board | Hamilton |
| Ontario Motor Vehicle Industry Council | Toronto |
| Ontario. Ministry of Government and Consumer Services. Consumer Protection Ontario | Toronto |
| Ontario. Ministry of Long-Term Care, Long-Term Care Family Support and Action Line | Toronto Downtown Central |
| Ontario. Ministry of Municipal Affairs and Housing. Rental Housing Enforcement Unit | Toronto |
| Ontario. Ministry of the Attorney General, Hamilton Services, Office of the Public Guardian and Trustee | Hamilton |
| Ontario. Ministry of the Attorney General. Office of the Public Guardian and Trustee | Toronto |
| Patient Ombudsman | Toronto Downtown Central |
| Psychiatric Patient Advocate Office, Patient Advocacy, Education and Information | Toronto |
| Real Estate Council of Ontario | Toronto |
| Retirement Homes Regulatory Authority | Toronto Downtown Central |
| Royal College of Dental Surgeons of Ontario | Toronto Downtown North |
| Service Canada, Office for Client Satisfaction (The) | Ottawa |
| Special Investigations Unit | Mississauga |
| Technical Standards and Safety Authority | Toronto |
| Travel Industry Council of Ontario | Mississauga |
| Tribunals Ontario | Toronto |
