| Ian Anderson House, Residential Hospice | Oakville |
| ICNA Relief Canada, Head Office, Muslim Family Services - Food Bank | Mississauga |
| ICNA Relief Canada, Head Office, Muslim Family Services | Mississauga |
| Ignite Artistic Swimming Club | Burlington |
| Immigration and Refugee Board of Canada. Central Region, Toronto | Toronto |
| Immigration, Refugees, and Citizenship Canada, Canadian Citizenship and Immigration Services | Hamilton |
| Inclusion Canada | Toronto Downtown Central |
| Independent Living Halton, Deborah's Home and Attendant Outreach Services | Milton |
| Indigenous Diabetes Health Circle, Indigenous Diabetes Health Circle, Niagara Region | Thorold |
| Indigenous Network, Mississauga, Indigenous programs | Mississauga |
| Indspire | Toronto |
| Indus Community Services, Oakville Office, Employment Services | Oakville |
| Indus Community Services, Family Services, Brampton Gillingham Office | Brampton |
| Indus Community Services, Family Services, Mississauga Head Office - Hurontario Suite 206 | Mississauga |
| Indus Community Services, Newcomer Services, Brampton Gillingham Office, Brampton - Gillingham Dr Office | Brampton |
| Infant Car Seats, Booster Seats, Halton Region | Halton Region |
| Infinity Health Centre, Walk-in Clinic | Oakville |
| Information Burlington | Burlington |
| Information Halton Hills | Halton Hills |
| Information Milton | Milton |
| Information Oakville | Oakville |
| Institute for Advancements in Mental Health, Toronto Provincial Office | Toronto |
| Interligne | Québec |
| International Credential Assessment Service of Canada | Guelph |
| International Development and Relief Foundation, Toronto Office, International and Local Education Programs | Toronto |
| International Dyslexia Association - Ontario Branch | Toronto |
| International Railroad for Queer Refugees | Toronto |
| Interval House of Hamilton, Flamborough Women's Resource Centre Location, Counselling and Community Services | Hamilton |
| Interval House of Hamilton, Victoria and Friends Women's Shelter | Hamilton |
| Intrada Brass | Oakville |
| IODE, Oakville - Angela Bruce Chapter, Thrift Shop | Oakville |
| Iranian Women's Organization of Ontario | Toronto |
| Iroquois Ridge Medical & Dermal, Family Practice and Walk-in Medical Clinic | Oakville |
| Islamic Community Centre of Milton | Milton |
| Islamic Community of Oakville | Oakville |
| Italian Canadian Club of Burlington | Burlington |
| Italian Cultural Centre of Milton | Milton |
