| Kemp Care Network, Hospice and Palliative Care, Kemp Care Network | Hamilton |
| Kerr Speers Pharmacy, Pharmacy Services | Oakville |
| 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, Neighbour Care Network | Oakville |
| Kidney Cancer Canada | Streetsville |
| Kidney Foundation of Canada, Ontario Branch | Mississauga |
| Kilbride United Church | Burlington |
| King Cove Medical Clinic | Halton Hills |
| King's Community Church | Oakville |
| Kingsridge Medical Clinic | Oakville |
| KMH Cardiology Centres | Burlington |
| Knox Heritage Place | Oakville |
| Knox Presbyterian Church, Acton | Acton |
| Knox Presbyterian Church, Georgetown | Georgetown |
| Knox Presbyterian Church, Burlington | Burlington |
| Knox Presbyterian Church, Milton | Milton |
| Knox Presbyterian Church, Oakville | Oakville |
