| Kerr Street Medical Centre | Oakville |
| Kerr Street Mission, Community Social Services | Oakville |
| Kerr Street Mission, Community Meals | Oakville |
| Kerr Street Mission, Food Market | Oakville |
| Kerr Street Mission, Youth Connected | Oakville |
| Kerry's Place Autism Services, Kennedy Mississauga Resource Centre | Mississauga |
| Kidney Foundation of Canada, Ontario Branch | Mississauga |
| Kids' Health Links Foundation | Oakville |
| Kids Help Phone, Crisis Text Line | |
| Kids Help Phone, Group Wellness Programs | Toronto |
| Kids Help Phone | Toronto |
| Kids Now | Toronto |
| KidSport Ontario, Burlington - Mailing Address, Recreation Expense Assistance | Ontario |
| Kinark Child and Family Services, Syl Apps Youth Centre | Oakville |
| King Cove Medical Clinic | Halton Hills |
| King's Christian Collegiate | Oakville |
| Kingsridge Medical Clinic | Oakville |
| Knox Presbyterian Church, Georgetown | Georgetown |
| Knox Presbyterian Church, Burlington | Burlington |
