| Achēv, Accelerating Career Advancement Program | Mississauga |
| Ad Standards, Toronto | Toronto |
| Alcohol and Gaming Commission of Ontario | Toronto |
| Assessment Review Board, Toronto | Toronto |
| Automobile Protection Association | Toronto |
| Bereavement Authority of Ontario, Toronto | Toronto |
| Better Business Bureau Central Ontario | Kitchener |
| Burlington. By-law Compliance, Licensing Services | Burlington |
| Burlington. City Hall, Burlington City Hall, Applications, Licences and Permits | Burlington |
| Burlington. Finance Department, Assessment & Taxation Section | Burlington |
| Burlington. Finance Department, Property Tax Rebate / Deferral | Burlington |
| Burlington. Fire Department, Public Fire Inspections & Fire Safety Education Programs | Burlington |
| Burlington. Office of the City Clerk | Burlington |
| Burlington. Office of the City Clerk, Burlington Accessibility Advisory Committee | Burlington |
| Burlington. Roads, Parks and Forestry, Parking Services | Burlington |
| Canada Post, Online Service, Find a Post Office | Ontario |
| Canada Post Corporation, Acton Post Office, Postal Services | Acton |
| Canada Post Corporation, Georgetown Post Office, Postal Services | Georgetown |
| Canada Post Corporation, Burlington Post Office, Postal Services | Burlington |
| Canada Post Corporation, Milton Post Office, Postal Services | Milton |
| Canada Post Corporation, Campbellville Post Office, Postal Services | Milton |
| Canada Post Corporation, Oakville - Lakeshore West Post Office, Postal Services | Oakville |
| Canada. Bank of Canada, Unclaimed Properties Office | Ottawa (City of) |
| Canada. Border Services Agency, NEXUS Program | Niagara Falls |
| Canada. Canada Revenue Agency, Tax Information | Canada |
| Canada. Canada Revenue Agency, Charities Directorate | Ottawa |
| Canada. Canada Revenue Agency, Sir Isaac Brock Building, Hamilton Tax Services | Hamilton |
| Canada. Canada Revenue Agency, Toronto Region, Canada Child Benefit | Toronto |
| Canada. Canada Revenue Agency, Toronto Region, Taxes and benefits, Toronto Region | Toronto |
| Canada. Canadian Food Inspection Agency, Ontario Area Office | Guelph |
| Canada. Canadian Intellectual Property Office, Patents | Gatineau |
| Canada. Canadian Radio-television and Telecommunications Commission, Spam Reporting Centre | Ottawa |
| Canada. Canadian Radio-television and Telecommunications Commission | Ottawa |
| Canada. Competition Bureau, Information Centre | Gatineau |
| Canada. Crown-Indigenous Relations and Northern Affairs and Indigenous Services, Allegations and Complaints | Gatineau |
| Canada. Financial Consumer Agency of Canada, Ottawa, Cashing a Government of Canada Cheque | Ottawa |
| Canada. Health Canada, Cannabis in Canada | Ottawa |
| Canada. Immigration, Refugees and Citizenship Canada, Passport Office, Brampton Branch | Brampton |
| Canada. Immigration, Refugees and Citizenship Canada, Passport Office, Mississauga Branch | Mississauga |
| Canada. Indigenous Services Canada | Toronto |
| Canada. Innovation, Science and Economic Development Canada, Gatineau, Canadian Intellectual Property Office | Gatineau |
| Canada. Innovation, Science and Economic Development Canada, Canadian Consumer Handbook | Ottawa |
| Canada. Innovation, Science and Economic Development Canada, Corporations Canada - Business Incorporation | Ottawa |
| Canada. Innovation, Science and Economic Development Canada, Spectrum and Telecommunications Sector - Amateur Radio Service Centre | Sault Ste. Marie |
| 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. Social Insurance Numbers, Toronto | Toronto |
| Canada. Transport Canada, Pleasure Craft Licensing and Proof of Competency | Halton Region |
| Canada. Transport Canada, Pleasure Craft Licensing Centre | Ottawa |
| Canada. Veterans Affairs Canada [Toronto area], Veterans Ombudsman | Toronto |
| Canada. Veterans Review and Appeal Board, Charlottetown | Charlottetown |
| Canadian Association of the Deaf | Ottawa |
| Canadian Automobile Association, South Central Ontario - Burlington Office | Burlington |
| Canadian Federation of Students | Ottawa |
| Canadian Human Rights Commission | Ottawa |
| Canadian Marketing Association | Toronto |
| Canadian Motor Vehicle Arbitration Plan | Toronto |
| Canadian Power and Sail Squadrons, Niagara District - Burlington Power and Sail Squadron | Burlington |
| Canadian Power and Sail Squadrons, Oakville Power and Sail Squadron | Oakville |
| Canadian Therapeutic Riding Association | Guelph |
| Canadian Ukrainian Immigrant Aid Society, Toronto - Main Office | Toronto |
| Chinese Association of Mississauga, Mississauga | Mississauga |
| 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 Homeopaths of Ontario | Toronto Downtown Central |
| 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 |
| Consolidated Credit Counselling Services of Canada | Toronto |
| Credit Canada, Oakville Office | Oakville |
| Credit Canada Debt Solutions, Credit Canada Debt Solutions, Head Office / North York Branch | Toronto |
| Credit Counselling Society, Credit Counselling Society Debt Help | Hamilton |
| Credit Counselling Society, Mississauga | Mississauga |
| Credit Counselling Society, Toronto | Toronto |
| Dar Foundation | Oakville |
| Dare to be Youth Charity | Burlington |
| DriveTest Centre, Burlington, Driver Examination Centre | Burlington |
| DriveTest Centre, Oakville, Driver Examination Centre | Oakville |
| DriveTest Centre, Guelph | Guelph |
| Electrical Safety Authority | Cambridge |
| Equifax Canada Inc | Montréal |
| Federation of Rental Housing Providers of Ontario, Rental Housing Provider Support | Toronto |
| Financial Services Regulatory Authority of Ontario | Toronto |
| Halton Hills. Corporate Services | Georgetown |
| Halton Hills. Finance Department, Property Tax Information | Halton Hills |
| Halton Hills. Fire Department, Inspections and Permits | Halton Hills |
| Halton Hills. Town Council, Clerks Division Services | Halton Hills |
| Halton Hills. Transportation and Public Works, Parking | Halton Hills |
| Halton Regional Police Service, Police Records Checks | Oakville |
| Halton Regional Police Service, Public Complaints Process | Halton Region |
| Halton. Halton Region Public Health, Food Safety | Oakville |
| Halton. Halton Region Public Health, Immunization Services | Oakville |
| Halton. Small Business Centre, Small Business Enterprise Centre | Oakville |
| HSR Public Transit, HSR Customer Centre Services | Hamilton |
| Income Tax Clinics, Burlington | Burlington |
| Income Tax Clinics, Halton Hills | Halton Hills |
| Income Tax Clinics, Milton | Milton |
| Income Tax Clinics, Oakville | Oakville |
| Information and Privacy Commissioner of Ontario | Toronto |
| Insurance Bureau of Canada, Ontario Head Office, Consumer Information Centre | Toronto |
| International Credential Assessment Service of Canada | Guelph |
| Kerr Street Mission, Community Social Services | Oakville |
| Law Enforcement Complaints Agency | Toronto |
| Law Society of Ontario | Toronto |
| Links2Care, Acton Community Hub, Care at Home for Seniors and Adults with Disabilities | Acton |
| Links2Care, Care In The Community - Community Volunteer Income Tax Program | Halton Hills |
| Links2Care, Georgetown Community Hub, Care at Home for Seniors and Adults with Disabilities | Halton Hills |
| Lost Wallet, Burlington | Burlington |
| Lost Wallet, Oakville | Oakville |
| Milton. Community Services, Special Events | Milton |
| Milton. Corporate Services, Parking | Milton |
| Milton. Corporate Services, Property Tax Information | Milton |
| Milton. Engineering Services | Milton |
| Milton. Fire and Rescue Services, Community Education Programs | Milton |
| Milton. Legislative and Legal Services Division, Freedom Of Information Requests | Milton |
| Milton. Town Clerk's Division, Accessibility Information and Standards | Milton |
| Milton. Town Clerk's Division, Business Licences and Permits | Milton |
| Milton. Town Clerk's Division, Vital Statistics | Milton |
| Municipal Property Assessment Corporation, Online Service, Find a Municipal Property Assessment Corporation Office | |
| National NewsMedia Council | Toronto |
| Oak Park Neighbourhood Centre, Low Income Supports | Oakville |
| Oak Park Neighbourhood Centre, Year Round Low Income Tax Clinic | Oakville |
| Oakville. Clerks Department | Oakville |
| Oakville. Clerks Department, Marriage, Lottery, and Liquor Licences | Oakville |
| Oakville. Fire Department, Fire Prevention Programs | Oakville |
| Oakville. Municipal Enforcement Services, Parking Operations | Oakville |
| Oakville. Municipal Enforcement Services, Business Licensing | Oakville |
| Oakville. Recreation and Culture, Special Events Service | Oakville |
| Oakville. ServiceOakville, Property Tax Payments | Oakville |
| 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 Application Service | Guelph |
| 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 Human Rights Commission | 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 Public Holidays and Retail Business Holidays | Ontario |
| Ontario Securities Commission, GetSmarterAboutMoney.ca | Toronto |
| Ontario Securities Commission | Toronto |
| Ontario. Ministry for Seniors and Accessibility | Toronto |
| Ontario. Ministry of Children, Community and Social Services, Mississauga | Mississauga |
| Ontario. Ministry of Education | Toronto |
| Ontario. Ministry of Environment, Conservation and Parks, Peterborough - Mailing Address, Natural Resources Information and Support Centre | Peterborough |
| Ontario. Ministry of Finance, Objections and Tax Appeals | Oshawa |
| Ontario. Ministry of Finance, Oshawa, Guaranteed Annual Income System | Oshawa |
| Ontario. Ministry of Government and Consumer Services. Consumer Protection Ontario | Toronto |
| Ontario. Ministry of Health, Public Health Care | Toronto Downtown Central |
| Ontario. Ministry of Labour, Immigration, Training and Skills Development. Employment Practices Branch, Central Region West, Mississauga, Ontario. Ministry of Labour, Immigration, Training and Skills Development. Employment Practices Branch, Central Region West, Mississauga | Mississauga |
| Ontario. Ministry of Labour, Immigration, Training and Skills Development. Employment Practices Branch, Ontario. Ministry of Labour, Immigration, Training and Skills Development. Employment Practices Branch, Main Office | 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, Family Court - Litigation Department | Hamilton |
| 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 |
| Ontario. Ministry of the Environment, Conservation and Parks, Ontario Parks | Peterborough |
| Ontario. Ministry of Transportation, Tow Zone Pilot Program | Ontario |
| Patient Ombudsman | Toronto Downtown Central |
| Psychiatric Patient Advocate Office, Patient Advocacy, Education and Information | Toronto |
| Real Estate Council of Ontario | Toronto |
| Registered Massage Therapists' Association of Ontario | Etobicoke |
| Retirement Homes Regulatory Authority | Toronto Downtown Central |
| Roots Community Services | Brampton |
| Royal College of Dental Surgeons of Ontario | Toronto Downtown North |
| Salvation Army (The), Oakville, Community and Family Services | Oakville |
| Service Canada, Guelph, Service Canada Centre | Guelph |
| Service Canada, Social Insurance Registration Office | Bathurst |
| Service Canada, Office for Client Satisfaction (The) | Ottawa |
| Service Canada, Service Canada, Mississauga Service Canada Centre | Mississauga |
| Service Canada, Passport Canada | Ottawa |
| Service Canada - Halton Region, Oakville, Federal Government Services | Oakville |
| Service Canada - Halton Region, Burlington, Federal Government Services | Burlington |
| Service Canada - Halton Region, Georgetown, Federal Government Services | Georgetown |
| Service Canada - Halton Region, Milton, Federal Government Services | Milton |
| Service Canada Hamilton Locations, Hamilton East Service Canada Centre and Passport Services, Canadian Passport Service | Hamilton |
| Service Canada Hamilton Locations, Hamilton Mountain Service Canada Centre and Passport Services | Hamilton |
| ServiceOntario, ServiceOntario, Brampton North Service Counter | Brampton |
| ServiceOntario, ServiceOntario, Brampton South Service Counter | Brampton |
| ServiceOntario, ServiceOntario, Mississauga - Dundas St W Service Counter | Mississauga |
| ServiceOntario, Accessible Parking Permit | Toronto |
| ServiceOntario, Office of the Registrar General | Toronto |
| ServiceOntario | Toronto |
| ServiceOntario, Silvercreek and Highway 6 (Guelph), Provincial Government Services | Guelph |
| ServiceOntario, Stone Road and Gordon (Guelph), Provincial Government Services | Guelph |
| ServiceOntario - Halton Region, Burlington - West Service Counter, Provincial Government Services | Burlington |
| ServiceOntario - Halton Region, Burlington - East Service Counter, Provincial Government Services | Burlington |
| ServiceOntario - Halton Region, Georgetown Service Counter, Provincial Government Services | Georgetown |
| ServiceOntario - Halton Region, Milton - Highpoint Service Counter, Provincial Government Services | Milton |
| ServiceOntario - Halton Region, Milton - Milton Mall Service Counter, Provincial Government Services | Milton |
| ServiceOntario - Halton Region, Oakville - Dorval Crossing East Service Counter, Provincial Government Services | Oakville |
| ServiceOntario - Halton Region, Oakville - Pacific Road Service Counter, Provincial Government Services | Oakville |
| ServiceOntario - Halton Region, Oakville - Staples Service Counter, Provincial Government Services | Oakville |
| ServiceOntario - Halton Region, Oakville - Trafalgar Village Service Counter, Provincial Government Services | Oakville |
| Silent Voice Canada | Toronto Downtown North |
| Special Investigations Unit | Mississauga |
| Technical Standards and Safety Authority | Toronto |
| TransUnion of Canada, Burlington, Consumer Relations | Burlington |
| Travel Industry Council of Ontario | Mississauga |
| Tribunals Ontario | Toronto |
| University of Toronto, Comparative Education Service | Toronto |
| Women's Centre of Halton (The), One-on-One Support Services | Oakville |
| World Education Services, Toronto | Toronto |
