| Karis Disability Services, Developmental Disability Support Services | Waterloo Region |
| Kemp Care Network, Hospice and Palliative Care, Kemp Care Network | Hamilton |
| Kendellhurst Academy, Licensed Child Care Centre | Oakville |
| Kerr Speers Pharmacy, Pharmacy Services | Oakville |
| Kerr Street Concert Band | 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 |
| Kerr Street Mission, Youth Connected | Oakville |
| Kerr Village Business Improvement Area | Oakville |
| Kerry's Place, Kennedy Mississauga Resource Centre | Mississauga |
| Kidex Childcare, Licensed Child Care Centre | Oakville |
| KidLogic Child Care Learning Centres, Oakville, Licensed Child Care Centre | Oakville |
| Kidlogic Child Care Learning Centres, Burlington, Licensed Child Care Centre | Burlington |
| Kidney Cancer Canada | Streetsville |
| Kidney Foundation of Canada, Ontario Branch | Mississauga |
| Kidney Foundation of Canada (The), Kidney Car Program - Kidney Car Hot Line | Toronto |
| Kids & Company Child Care Centre, Burlington Children's Centre, Licensed Child Care Centre | Burlington |
| Kids & Company Child Care Centre, Burlington - Appleby Line, Licensed Child Care Centre | Burlington |
| Kids & Company Child Care Centre, Burlington - Burloak Dr, Licensed Child Care Centre | Burlington |
| Kids & Company Child Care Centre, Burlington - Guelph Line, Licensed Child Care Centre | Burlington |
| Kids & Company Child Care Centre, Milton, Licensed Child Care Centre | Milton |
| Kids & Company Child Care Centre, Oakville - Cornwall Rd, Licensed Child Care Centre | Oakville |
| Kids & Company Child Care Centre, Oakville - Dundas St E, Licensed Child Care Centre | Oakville |
| Kids & Company Child Care Centre, Oakville - Joshua Creek, Licensed Child Care Centre | Oakville |
| Kids & Company Child Care Centre, Oakville - Wyecroft Rd, Licensed Child Care Centre | Oakville |
| Kids' Health Links Foundation | Oakville |
| Kids Help Phone, Crisis Text Line | Toronto |
| Kids Help Phone, Group Wellness Programs | Toronto |
| Kids Help Phone | Toronto |
| KidSport Ontario - Halton Chapter, Recreation Expense Assistance | Halton Region |
| Kidsville Early Learning Center, Burlington, Licensed Child Care Centre | Burlington |
| Kidz Korner, Licensed Child Care Centre | Milton |
| Kilbride United Church | Burlington |
| Kin Club of Halton Hills | Georgetown |
| Kinark Child and Family Services, Syl Apps Youth Centre | Oakville |
| Kinder Buddies Childcare and Development Centre, Licensed Child Care Centre | Oakville |
| Kinder Kids International Academy, Licensed Child Care Centre | Oakville |
| Kinderhuis Montessori, Licensed Child Care Centre | Oakville |
| King Cove Medical Clinic | Georgetown |
| King's Christian Collegiate | Oakville |
| King's Christian Collegiate, Rental Facilities | Oakville |
| King's Community Church | Oakville |
| Kingsridge Medical Clinic | Oakville |
| Kinsmen Club of Oakville | Oakville |
| Kiwanis Club of Georgetown | Georgetown |
| Kiwanis Club of Oakville | Oakville |
| KMH Cardiology Centres | Burlington |
| Knights of Columbus, Acton - St Joseph Patron of Canada Council 8050 | Acton |
| Knights of Columbus, Georgetown | Georgetown |
| Knights of Columbus, Burlington - Msgr James Corbett Warren Memorial Council 5073 | Burlington |
| Knights of Columbus, Burlington - St Gabriel's Parish Council 10061 | Burlington |
| Knights of Columbus, Burlington - Saint Antoine Daniel Council 10340 | Burlington |
| Knights of Columbus, Burlington - Pope John Paul II Assembly 3176 | Burlington |
| Knights of Columbus, Burlington - Our Lady of the Most Holy Rosary 15920 | Burlington |
| Knights of Columbus, Milton - St Benedict of Nursia Council 16746 | Milton |
| Knights of Columbus, Milton - Holy Rosary Council 6777 | Milton |
| Knights of Columbus, Oakville - Mary Mother of God Council 14446 | Oakville |
| 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 |
