| Ian Anderson House, Residential Hospice | Oakville |
| iCARE Home Health, In-Home Care Services | Oakville |
| ICNA Relief Canada, Muslim Family Services - Food Bank | Mississauga |
| ICNA Relief Canada, Muslim Family Services | Mississauga |
| ICNA Sisters Milton | Milton |
| IDA Brant Arts Pharmacy, Pharmacy Services | Burlington |
| IDA Brant Arts Pharmacy, Burlington - Brant St, Home Health Care Products | Burlington |
| IDA Burlington Drug Mart, Pharmacy Services | Burlington |
| IDA Burlington Heights Pharmacy, Pharmacy Services | Burlington |
| IDA Maple Pharmacy, Pharmacy Services | Burlington |
| IDA MedProHealth Pharmacy, Pharmacy Services | Burlington |
| IDA Mount Royal Pharmacy, Pharmacy Services | Burlington |
| IDA Pharmacy, Oakville - Third Line (Royal Oak Pharmacy), Pharmacy Services | Oakville |
| IDA Pharmacy, Oakville - Argus Rd (St Mark's Pharmacy), Pharmacy Services | Oakville |
| IDA Pharmacy, Georgetown - Guelph St (King Cove Pharmacy), Pharmacy Services | Georgetown |
| IDA Pharmacy, Oakville - Queensbury Cres (Upper Middle Pharmacy), Pharmacy Services | Oakville |
| IDA Pharmacy, Oakville - Oak Park Blvd (Central Park Pharmacy), Pharmacy Services | Oakville |
| IDA Pharmacy, Oakville - Ford Dr (Ford Dr Pharmacy), Pharmacy Services | Oakville |
| IDA Pharmacy, Oakville - Burnhamthorpe Rd E (Sav-On Pharmacy), Pharmacy Services | Oakville |
| IDA St Mary Pharmacy, Pharmacy Services | Burlington |
| Ignite Artistic Swimming Club | Burlington |
| In Home Haircuts by Sam | Mississauga |
| Income Tax Clinics, Burlington | Burlington |
| Income Tax Clinics, Halton Hills | Halton Hills |
| Income Tax Clinics, Milton | Milton |
| Income Tax Clinics, Oakville | Oakville |
| Independent Living Halton, Deborah's Home and Attendant Outreach Services | Milton |
| Indigenous Diabetes Health Circle, Indigenous Diabetes Health Circle, Niagara Region | Thorold |
| Indigenous Network, Indigenous Programs | Mississauga |
| Infinity Health Centre, Walk-in Clinic | Oakville |
| Information Burlington | Burlington |
| Information Halton Hills | Georgetown |
| Information Milton | Milton |
| Information Oakville | Oakville |
| Innomar Specialty Pharmacy, Pharmacy Services | Burlington |
| Insight Health Solutions - Trillium Health Partners | Oakville |
| InspiAIR Mississauga | Dixie |
| Institute for Advancements in Mental Health, Toronto Provincial Office | Toronto |
| Interval House, Virtual Counselling Services | 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 |
| In-Trend Home Solutions GTA | Etobicoke South |
| Iranian Women's Organization of Ontario | Toronto |
| Ironoak Pharmacy, Pharmacy Services | Oakville |
| Ironwood Project (The), Support for Survivors of Childhood Sexual Abuse | Georgetown |
| 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 |
