Ontario Costco Warehouses
- Ajax
- Ancaster
- Barrhaven
- Barrie
- Brampton
- Brantford
- Burlington ON
- C Mississauga
- Downsview
- E Markham
- Etobicoke
- Gloucester
- Guelph
- Kanata
- Kingston
- Kitchener
- Markham
- N London
- N Mississauga
- N Oshawa
- Nepean
- Newmarket
- Niagara Falls
- NW Toronto
- NW Vaughan
- Orillia
- Oshawa
- Peterborough
- Richmond Hill
- S London
- S Mississauga
- Scarborough ON
- Stoney Creek
- Sudbury
- Thorncliffe Park
- Vaughan
- Waterloo
- Windsor