| W. Ross Macdonald School for the Blind | Brantford |
| Wai Nui O Kanaka Outrigger Canoe Club | Oakville |
| Walkers Medical Centre, Walk-in Medical Clinic | Burlington |
| Walk-In Medical Clinics, Burlington | Burlington |
| Walk-In Medical Clinics, Halton Hills | Halton Hills |
| Walk-In Medical Clinics, Milton | Milton |
| Walk-In Medical Clinics, Oakville | Oakville |
| Wallace Park Tennis Club | Oakville |
| War Amps (The), National Headquarters | Ottawa |
| Wastewise, Georgetown, Thrift Store | Georgetown |
| Waterdown Rod and Gun Club, Waterdown Rod and Gun Club Programs | Hamilton |
| We Matter, Indigenous Youth Support | British Columbia |
| We Rock the Spectrum Kid's Gym | Oakville |
| WELL Health Medical Centre, Walk-in Medical Clinic | Oakville |
| Wellbeings Pain Management and Dependency Clinic | Burlington |
| Wellington Square United Church, Community Hub and Lunch | Burlington |
| WES For Youth Online, E-Counselling Mental Health Support Services | Brockton |
| Wesley, Housing Services – Halton | Halton Region |
| West End Studio Theatre | Oakville |
| West Plains Medical and Pharmacy, Walk-in Medical Clinic | Burlington |
| Western Ontario Highland Dancers Association, Halton-Hamilton/Wentworth District | Hamilton |
| William Osler Health System, Peel Memorial Centre for Integrated Health and Wellness | Brampton |
| William Osler Health System, Peel Memorial Centre for Integrated Health and Wellness, Urgent Care Centre | Brampton |
| Winston Park Medical Centre, Walk-in Medical Clinic | Oakville |
| Women's Care Abortion Clinic Toronto | North York West |
| Women's Centre of Halton (The), Oakville Office, Women's Support Services | Oakville |
| Women's Centre of Halton (The), Milton Office, North Halton Women's Support Services | Milton |
| Women's Centre of Halton (The), Oakville Office, Employment Services | Oakville |
| Women's Centre of Halton (The), Oakville Office, Support Groups and Workshops | Oakville |
| Women's Centre of Halton (The), One-on-One Support Services | Oakville |
| Women's College Hospital, Bay Centre for Birth Control | Toronto |
| Women's College Hospital, Crossroads Refugee Health Clinic | Toronto |
| Women's College Hospital, Mental Health Program, Reproductive Life Stages Program | Toronto |
| Women's College Hospital, Sexual Assault / Domestic Violence Care Centre | Toronto |
| Women's College Hospital, Substance Use Service | Toronto |
| Womens Recreational Volleyball, Mailing Address | Milton |
| Women's Shelters Canada, No Physical Address, Tech Safety Canada | Ontario |
| Women's Shelters Canada, ShelterSafe.ca | Ottawa |
| Woodview Mental Health and Autism Services | Burlington |
| Woodview Mental Health and Autism Services, Woodview Learning Centre | Burlington |
| Workplace Safety and Insurance Board, Toronto Office | Toronto |
| World Education Services | Toronto |
