| Ian Anderson House | Oakville |
| IDA Pharmacy, Oakville - 3ème Line (Royal Oak Pharmacy), Services pharmaceutiques | Oakville |
| IDA Pharmacy, Oakville - Chemin Argus (St Mark's Pharmacy), Services Pharmaceutiques | Oakville |
| IDA Pharmacy, Georgetown - Rue Guelph (King Cove Pharmacy), Services Pharmaceutiques | Halton Hills |
| IDA Pharmacy, Oakville - Croissant Queensbury (Upper Middle Pharmacy), Services Pharmaceutiques | Oakville |
| IDA Pharmacy, Oakville - Boulevard Oak Park (Central Park Pharmacy), Services de pharmacie | Oakville |
| IDA Pharmacy, Oakville - Promenade Ford (Ford Dr Pharmacy), Services pharmaceutiques | Oakville |
| IDA Pharmacy, Oakville - Chemin Burnhamthorpe Est (Sav-On Pharmacy), Services Pharmaceutiques | Oakville |
| Inactif March of Dimes Canada, March of Dimes Canada | Hamilton |
| Inactif Ontario. Ministry of Municipal Affairs and Housing, Ministry of Municipal Affairs and Housing | Hamilton |
| Inactif Ontario.Ministry of the Attorney General, Hamilton Services, Ministry of the Attorney General, Hamilton Services | Hamilton |
| Inactif Ontario.Ministry of the Attorney General, Hamilton Services, Ministry of the Attorney General, Hamilton Services | Hamilton |
| Inactif Ontario.Ministry of the Attorney General, Hamilton Services, Hamilton Central, Ministry of the Attorney General, Hamilton Services | Hamilton |
| Inactif Ontario.Ministry of the Attorney General, Hamilton Services, Hamilton Central, Ministry of the Attorney General, Hamilton Services | Hamilton |
| Inactif Ontario.Ministry of the Attorney General, Hamilton Services, Ministry of the Attorney General, Hamilton Services | Hamilton |
| INCA, Halton / Peel | Brampton |
| Inclusion Canada | Toronto Centre-ville Centre |
| Independent Living Halton, Deborah's Home and Attendant Outreach Services | Milton |
| Indspire | Toronto |
| Indus Community Services, Cours de langue pour les immigrants au Canada, Mississauga Head Office - Hurontario Suite 206 | Mississauga |
| Infinity Health Centre, Clinique sans rendez-vous | Oakville |
| Injured Workers Community Legal Clinic | Toronto |
| Innocence Canada | Toronto |
| Institut canadien pour la résolution des conflits (L') | Ottawa |
| Intégration communautaire de l'Ontario | North York Est |
| Interligne | Québec (province) |
| International Association for Medical Assistance to Travellers | York (Région) |
| Ironoak Pharmacy, Services pharmaceutiques | Oakville |
| Iroquois Ridge Medical & Dermal, Clinique médicale sans rendez-vous et cabinet de médecine générale | Oakville |
