| Wai Nui O Kanaka Outrigger Canoe Club | Oakville |
| Wallace Park Tennis Club | Oakville |
| War Amps (The), National Headquarters | Ottawa |
| Waterdown Montessori School, Licensed Child Care Centre | Burlington |
| We Rock the Spectrum Kid's Gym | Oakville |
| Wee Care Educational Services, Burlington - Plains Rd, Licensed Child Care Centre | Burlington |
| Wee Care Educational Services, Burlington - Downsview Dr, Licensed Child Care Centre | Burlington |
| Wee Ones Childcare Academy, Licensed Child Care Centre | Milton |
| Wee Watch Burlington Licensed Home Child Care Agency, Licensed Home Child Care | Burlington |
| Wee Watch Milton and Halton Hills Licensed Home Child Care Agency, Licensed Home Child Care | Milton |
| Wee Watch Oakville Licensed Home Child Care Agency, Licensed Home Child Care | Oakville |
| Wellspring, Online-Based Cancer Support | Toronto |
| Wellspring Birmingham Gilgan House, Community-Based Cancer Support | Oakville |
| West End Studio Theatre | Oakville |
| West Oakville Preschool Centre, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Old Bronte Campus, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Maple Grove Campus, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Morrison Campus, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Oakhill Campus, Licensed Child Care Centre | Oakville |
| Western Heights Montessori Academy, Westoak Campus, Licensed Child Care Centre | Oakville |
| Western Ontario Highland Dancers Association, Halton-Hamilton/Wentworth District | Hamilton |
| Wildwood Academy | Oakville |
| Willowbrae Academy Oakville, Licensed Child Care Centre | Oakville |
| Women's College Hospital, Crossroads Refugee Health Clinic | Toronto |
| Women's College Hospital, Mental Health Program, Reproductive Life Stages Program | Toronto |
| Womens Recreational Volleyball, Mailing Address | Milton |
| Woodland Childrens Centre, Licensed Child Care Centre | Burlington |
| Woodview Mental Health and Autism Services | Burlington |
| Woodview Mental Health and Autism Services, Woodview Learning Centre | Burlington |
