| | Nom(s) d'organisme | Situé à |
| | Canada Border Services Agency, Border Information Service (BIS) | Canada |
| | Canada Post Corporation | Niagara Region |
 | Canada. Agence canadienne d'inspection des aliments | Hamilton West |
| | Canada. Member of Parliament, Welland Riding | Welland |
 | Canada. Parks Canada, Fort George National Historic Site | Niagara-on-the-Lake |
 | Canada. Passport Canada, Passport Office, St Catharines | St Catharines |
 | Canada. Santé Canada, Bureau de la sécurité des produits de consommation | Hamilton Central |
 | Canada. Solicitor General, Correctional Service of Canada, St Catharines Area Parole Office | St Catharines |
 | Canadian Blood Services | St Catharines |
 | Canal View Homes | Welland |
 | Carlton Heights Medical Clinic - Unit 16, Dr Ravindran | St Catharines |
 | Carlton Medical Clinic - Unit 8, Dr Oladipo | St Catharines |
 | Casa El Norte | Fort Erie |
 | Centre de santé communautaire Hamilton/Niagara | Welland |
 | CERF Niagara | Welland |
 | CERF Niagara, Welland, Services d'emploi de l'Ontario | Welland |
 | Chez Marie Refugee Assistance Centre | St Catharines |
 | Child and Family Counselling - CAFC, Niagara Falls | Niagara Falls |
 | Child and Family Counselling - CAFC, St Catharines | St Catharines |
 | Child Find (Ontario) Inc, Niagara Community Link | Toronto |
 | Christian Horizons, Horizon House Niagara 3 | Port Colborne |
| | City of Niagara Falls Non-Profit Housing Corporation | Niagara Falls |
 | City of Welland, Welland Transit | Welland |
 | Club Alouette, Service d'Entraide | Niagara Falls |
 | Club Richelieu, St Catharines | St Catharines |
 | Club Richelieu, Welland | Welland |
| | Club Sourire | Niagara Falls |
 | Community Living St Catharines, Administrative Offices | St Catharines |
 | Community Living Welland Pelham, Children's Services, Welland Preschool Services | Welland |
 | Community Living Welland Pelham, Residential Alternatives | Welland |
 | Community Living Welland Pelham, Welland Packaging | Welland |
 | Conseil scolaire de district catholique Centre-Sud | Toronto (City of) |
 | Conseil scolaire Viamonde | Welland |
 | Consumer/Survivor Initiative of Niagara | Welland |
 | Contact Niagara for Children's & Developmental Services | St Catharines |
 | Credit Counselling of Regional Niagara | St Catharines |
 | Credit Counselling of Regional Niagara, Satellite Office - Niagara Falls | Niagara Falls |