| Wallace Minor Soccer, No Physical Address | North Perth |
| Walther's IDA Pharmacy | Mitchell |
| Wellspring Stratford Cancer Support Centre | Stratford |
| Wendy Wilkinson Interiors, No Physical Address | Stratford |
| West End Pharmacy | Stratford |
| West Perth Public Library, Summer Reading Program | West Perth |
| West Perth Public Library | West Perth |
| West Perth. Municipal Office, Municipal Office - Wellington St | West Perth |
| West Perth. Municipal Office, West Perth Community Centre | West Perth |
| West Perth. Municipal Office, West Perth Fire Department, Fire Department - Wellington St | West Perth |
| West Perth. Municipal Office, West Perth Lions Pool | West Perth |
| West Perth. Municipal Office, West Perth Thames Nature Trail and Wetlands | West Perth |
| West Perth. Municipal Office, West Perth Youth Centre | West Perth |
| Western Ontario Athletic Association | North Huron |
| Western University - Schulich Medicine & Dentistry, Goderich - Camp Klahanie, Discovery Healthcare - A Summer Camp Experience | Central Huron |
| Western University - Schulich Medicine & Dentistry, Stratford - Stratford General Hospital, Discovery Healthcare - A Summer Camp Experience | Stratford |
| Wildwood Sailing Club | St Marys |
| Wingham & District Snowmobile Club | North Huron |
| Wingham Minor Hockey Association | North Huron |
| Wingham Taxi | North Huron |
| Workers Health and Safety Legal Clinic | Toronto |
| Workplace Safety and Insurance Appeals Tribunal | Toronto Downtown |
| Workplace Safety and Insurance Board, Toronto Office | Toronto |
| Writers' Trust of Canada | Toronto Downtown |