| | Organization Name(s) | Located In |
| | 511 | Ontario |
 | Criminal Injuries Compensation Board | Toronto (City of) |
 | Financial Services Commission of Ontario | North York |
 | Fort Erie Public Library, Crystal Ridge Branch | Ridgeway |
 | Niagara Parks Commission (The), Administration | Niagara Falls |
 | Niagara Parks Commission (The), Butterfly Conservatory | Niagara Falls |
 | Niagara Parks Commission (The), Laura Secord Homestead | Queenston |
 | Niagara Parks Commission (The), Mackenzie Printery & Newspaper Museum | Queenston |
 | Niagara Parks Commission (The), McFarland House | Niagara-on-the-Lake |
 | Niagara Parks Commission (The), Niagara Parks Botanical Garden & School of Horticulture | Niagara Falls |
 | Niagara Parks Commission (The), Sir Adam Beck Station | Queenston |
 | Office of the Ontario Ombudsman | Toronto (City of) |
 | Office of the Provincial Advocate for Children and Youth | Toronto (City of) |
 | Ontario Trillium Foundation, Niagara Office | St Catharines |
 | Ontario. Employment Ontario, Apprenticeship Office, Niagara Region Office | St Catharines |
 | Ontario. Legislative Assembly - Cabinet Ministers | Toronto (City of) |
 | Ontario. Members of the Legislative Assembly, Hamilton Centre Provincial Riding, Andrea Horwath, MPP | Hamilton Central |
 | Ontario. Members of the Legislative Assembly, Niagara Falls Provincial Riding, Kim Craitor, MPP, Fort Erie Office | Fort Erie |
 | Ontario. Members of the Legislative Assembly, Niagara Falls Provincial Riding, Kim Craitor, MPP, Niagara Falls Office | Niagara Falls |
 | Ontario. Members of the Legislative Assembly, Niagara West - Glanbrook Provincial Riding, Tim Hudak, MPP | Beamsville |
 | Ontario. Members of the Legislative Assembly, Office of the Leader of the Opposition - Progressive Conservative Party (PC), Niagara West-Glanbrook Provincial Riding, Tim Hudak, MPP | Toronto (City of) |
 | Ontario. Members of the Legislative Assembly, St Catharines Provincial Riding, Jim Bradley, MPP | St Catharines |
 | Ontario. Members of the Legislative Assembly, Welland Provincial Riding, Cindy Forster, MPP, Port Colborne Office | Port Colborne |
 | Ontario. Members of the Legislative Assembly, Welland Provincial Riding, Cindy Forster, MPP, Thorold Office | Thorold |
 | Ontario. Members of the Legislative Assembly, Welland Provincial Riding, Cindy Forster, MPP, Welland Office | Welland |
 | Ontario. Ministry of Agriculture and Food and the Ministry of Rural Affairs | Vineland Station |
 | Ontario. Ministry of Children and Youth Services, Child and Parent Resource Institute (CPRI) | London |
 | Ontario. Ministry of Children and Youth Services, Ontario Child Benefit (OCB) | Toronto (City of) |
 | Ontario. Ministry of Children and Youth Services, Private and International Adoption Unit | Toronto (City of) |
 | Ontario. Ministry of Children and Youth Services, Youth Justice Services, St Catharines | St Catharines |
 | Ontario. Ministry of Citizenship and Immigration, Regional Services | St Catharines |
| | Ontario. Ministry of Community and Social Services, Family Responsibility Office | Toronto (City of) |
 | Ontario. Ministry of Community and Social Services, Ontario Disability Support Program, St Catharines | St Catharines |
| | Ontario. Ministry of Community and Social Services, Welfare Fraud Unit | Toronto (City of) |
 | Ontario. Ministry of Community and Social Services and Ministry of Children and Youth Services | Hamilton Central |
 | Ontario. Ministry of Community and Social Services and Ministry of Children and Youth Services, Assistance for Children with Severe Disabilities | Hamilton Central |
 | Ontario. Ministry of Community and Social Services and Ministry of Children and Youth Services, Assistance for Children with Severe Disabilities, Special Services at Home | Hamilton Central |
 | Ontario. Ministry of Community Safety and Correctional Services, Niagara Detention Centre | Thorold |
 | Ontario. Ministry of Community Safety and Correctional Services, Office of the Chief Coroner, Regional Supervising Coroners, West Region | Hamilton |
 | Ontario. Ministry of Community Safety and Correctional Services, Probation and Parole Services, Niagara Falls | Niagara Falls |
 | Ontario. Ministry of Community Safety and Correctional Services, Probation and Parole Services, St Catharines | St Catharines |
 | Ontario. Ministry of Community Safety and Correctional Services, Probation and Parole Services, Welland | Welland |
| | Ontario. Ministry of Consumer Services, Consumer Protection Branch | Toronto (City of) |
| | Ontario. Ministry of Consumer Services, Retail Business Holidays Act | Toronto (City of) |
 | Ontario. Ministry of Culture, Ontario Arts Council | Toronto (City of) |
 | Ontario. Ministry of Economic Development, Trade and Employment, Business Advisory Services Branch, Central Region, St Catharines | St Catharines |
| | Ontario. Ministry of Energy, Ontario Clean Energy Benefit | Ontario |
 | Ontario. Ministry of Finance | Oshawa |
 | Ontario. Ministry of Finance, Client Services Branch | Hamilton Central |
 | Ontario. Ministry of Finance, Ontario Tax Credits | Oshawa |
 | Ontario. Ministry of Government and Consumer Services, Companies and Personal Property Security Branch, Names and Articles Control Incorporation as a Non-profit Organization | Toronto |
| | Ontario. Ministry of Government Services, Office of the Registrar General, Birth, Death, Marriage Certificates | Thunder Bay |
 | Ontario. Ministry of Government Services, ServiceOntario, INFOline | Toronto (City of) |
 | Ontario. Ministry of Health and Long-Term Care, Central South Region - Hamilton Office, Performance Improvement and Compliance Branch, Healthy System Accountability and Performance Division | Hamilton Central |
| | Ontario. Ministry of Health and Long-Term Care, Health Care Connect | Toronto |
| | Ontario. Ministry of Health and Long-Term Care, Ontario Drug Benefit | Ontario |
 | Ontario. Ministry of Health and Long-Term Care, Ontario Health Insurance Plan | St Catharines |
| | Ontario. Ministry of Health and Long-Term Care, Operational Support Branch, Assistive Devices Program and Home Oxygen Program | Toronto (City of) |
| | Ontario. Ministry of Health and Long-Term Care, Trillium Drug Program | Toronto (City of) |
| | Ontario. Ministry of Health Promotion and Sport, EatRight Ontario | Toronto |
 | Ontario. Ministry of Labour, Niagara Regional Office | St Catharines |
 | Ontario. Ministry of Labour, Office of the Worker Advisor | St Catharines |
 | Ontario. Ministry of Labour, Pay Equity Commission, Pay Equity Office | Toronto (City of) |
 | Ontario. Ministry of Municipal Affairs, Landlord and Tenant Board, Regional Office - Hamilton | Hamilton Central |
 | Ontario. Ministry of Natural Resources, Area Office | Vineland |
 | Ontario. Ministry of the Attorney General, Alcohol and Gaming Commission of Ontario | Toronto (City of) |
 | Ontario. Ministry of the Attorney General, Court Services, Family Law Information Centre, Niagara Falls | Niagara Falls |
 | Ontario. Ministry of the Attorney General, Court Services, Family Law Information Centre, St Catharines | St Catharines |
 | Ontario. Ministry of the Attorney General, Court Services, Family Law Information Centre, Welland | Welland |
 | Ontario. Ministry of the Attorney General, Court Services, St Catharines | St Catharines |
 | Ontario. Ministry of the Attorney General, Court Services, Welland | Welland |
 | Ontario. Ministry of the Attorney General, Crown Attorney, Niagara North | St Catharines |
 | Ontario. Ministry of the Attorney General, Crown Attorney, Niagara South | Welland |
 | Ontario. Ministry of the Attorney General, Office of the Public Guardian and Trustee, Hamilton Branch | Hamilton Central |
 | Ontario. Ministry of the Attorney General, Office of the Public Guardian and Trustee, Hamilton Branch, Guardianship Investigations | Toronto |
 | Ontario. Ministry of the Attorney General, Victims and Vulnerable Persons Division, Office of the Children's Lawyer | Toronto (City of) |
| | Ontario. Ministry of the Attorney General, Victims and Vulnerable Persons Division, Victim Support Line | Toronto |
 | Ontario. Ministry of the Attorney General, Victims and Vulnerable Persons Division, Victim/Witness Assistance Program, St Catharines | St Catharines |
 | Ontario. Ministry of the Attorney General, Victims and Vulnerable Persons Division, Victim/Witness Assistance Program, Welland Satellite Office | Welland |
| | Ontario. Ministry of the Environment, Drive Clean Program, Call Centre | Toronto (City of) |
 | Ontario. Ministry of the Environment, Niagara District Office | St Catharines |
 | Ontario. Ministry of the Environment, Niagara Escarpment Commission, St Catharines Satellite Office | St Catharines |
 | Ontario. Ministry of the Environment, Operations Division, West Central Region | Hamilton Central |
 | Ontario. Ministry of Tourism, Tourism Division, Ontario Travel Information Centre, Niagara Falls | Niagara Falls |
 | Ontario. Ministry of Tourism, Tourism Division, Ontario Travel Information Centre, St Catharines | Niagara-on-the-Lake |
 | Ontario. Ministry of Tourism and Culture, Regional Services | St Catharines |
 | Ontario. Ministry of Tourism, Culture and Sport, Regional Tourism Advisor | Kitchener |
 | Ontario. Ministry of Training, Colleges and Universities, Employment and Training Division, Employment Ontario, Apprenticeship, Second Career | Hamilton Central |
 | Ontario. Ministry of Training, Colleges and Universities, Employment and Training Division, Employment Ontario, Niagara Region | St Catharines |
| | Ontario. Ministry of Training, Colleges and Universities, Employment Ontario | Toronto |
 | Ontario. Ministry of Training, Colleges and Universities, Ontario Student Assistance Program, Student Support Branch | Thunder Bay |
 | Ontario. Ministry of Transportation | St Catharines |
 | Ontario. Ministry of Transportation, Board Room Bookings | St Catharines |
 | Ontario. Ministry of Transportation, Enhanced Driver's Licence (EDL), St Catharines | St Catharines |
 | Ontario. Ministry of Transportation, Hamilton/Niagara Enforcement Office | Stoney Creek |
 | Ontario. Ministry of Transportation, Metrolinx, GO Transit | Toronto (City of) |
| | Ontario. Ministry of Transportation, Senior Driver Renewal Program | Ontario |
 | Ontario. ServiceOntario, Fonthill | Fonthill |
 | Ontario. ServiceOntario, Fort Erie | Fort Erie |
 | Ontario. ServiceOntario, Grimsby | Grimsby |
 | Ontario. ServiceOntario, Land Registry Offices 30 & 59, Niagara North and South | St Catharines |
 | Ontario. ServiceOntario, Niagara Falls North, Thorold Stone Road | Niagara Falls |
 | Ontario. ServiceOntario, Niagara-on-the-Lake | Niagara-on-the-Lake |
 | Ontario. ServiceOntario, Port Colborne | Port Colborne |
| | Ontario. ServiceOntario, Publications | Toronto (City of) |
 | Ontario. ServiceOntario, Smithville | Smithville |
 | Ontario. ServiceOntario, St Catharines | St Catharines |
 | Ontario. ServiceOntario, St Catharines West, Scott Street | St Catharines |
 | Ontario. ServiceOntario, Welland | Welland |