| Organization Name(s) | Located In |
| W H Day Elementary School | Bradford |
| W Ross Macdonald School for the Visually Impaired and the Deafblind (The) | Brantford |
| War Amps (The) | Ottawa |
| Wasaga Beach Ministerial Food Bank | Wasaga Beach |
| Wasaga Beach Ministerial Food Bank, Christmas Assistance | Wasaga Beach |
| Waypoint Centre for Mental Health Care | Penetanguishene |
| Waypoint Centre for Mental Health Care, Bayview Dual Diagnosis Program | Penetanguishene |
| Waypoint Centre for Mental Health Care, Georgianwood Program for Concurrent Disorders | Penetanguishene |
| Waypoint Centre for Mental Health Care, Outpatient Services Program | Midland |
| Waypoint Centre for Mental Health Care, Outpatient Services Program, Transitional Age Youth Tele-psychiatry Consultation Service | Midland |
| Waypoint Centre for Mental Health Care, Psychiatric Patient Advocate Office | Penetanguishene |
| We Care Home Health Services | Barrie |
| Wee Watch Enriched Home Child Care, Barrie Area | Barrie |
| Weight Watchers. South Simcoe | Barrie |
| Welcome Wagon, Alliston, New Tecumseth, Adjala-Tosorontio Area | Alliston |
| Welcome Wagon, Barrie Area | Barrie |
| Welcome Wagon, Bradford West Gwillimbury Area | Bradford |
| Welcome Wagon, Innisfil | Innisfil |
| Welcome Wagon., Adjala-Tosorontio, Beeton & Tottenham Areas | Beeton |
| Welcome Wagon. Borden Angus Area | Essa |
| Welcome Wagon. Innisfil Area, Alcona, Gilford, LeFroy | Innisfil |
| Welcome Wagon. Schomberg Area | Schomberg |
| Weleff (Dr Peter) | Cookstown |
| Wheelchair Taxi | Mississauga |
| Whitchurch-Stouffville Public Library | Stouffville |
| Willow Breast Cancer Support Canada | Toronto |
| Wind Song Orchard | Clearview |
| With Open Arms, Apetito Community Meals | Barrie |
| Women and Children's Shelter of Barrie | Barrie |
| Womens Institute, Tec-We-Gwill | Bradford West Gwillimbury |
| Womens Institute, Tottenham | Tottenham |
| Women's Institutes, Simcoe Area | Simcoe County |
| Women's Institutes, Simcoe Kempenfelt District | Simcoe County |
| Women's Probus Club Of Alliston (The) | Alliston |
| womenshealthmatters.ca | Toronto |
| Woodington Lake Golf Club | Tottenham |
| Woodwind South Riding School | Barrie |
| Woolwich Community Services | Elmira |
| Workplace Safety and Insurance Board. Ontario, Toronto Head Office | Toronto |
| World Vision Canada. National Office | Mississauga |