ShonTron
Moderator
They do indeed.
http://www.robinsdonuts.com/locations.aspx lists 142 locations From Newfoundland to British Columbia. Driving across Canada, they seemed to be everywhere outside of southern Ontario, Quebec, and coastal BC.
Maybe you need to spend more time in Thunder Bay, Winnipeg, Charlottetown, St. Johns, and Saskatoon.
At 142 locations, surely it's the biggest Canadian chain there is, assuming the original poster's comments that Tim's is now Brazilian are correct..
The same company -- Chairman's Brands -- that owns Robin's Donuts also owns Coffee Time, Eggsmart, 241 Pizza, and New Orleans Pizza.