You can start here: The Association of Canadian Publishers Membership Directory
There are more indie and edge publishers here: The Canadian Writer’s Market (most recent edition!) – but you will also weep at how poorly most Canadian publications pay. (There’s a reason half of me is a corporate whore.)
The three indie Canadian presses I have a soft spot for are:
The Workhorsery: because Canlit does not have to be boring or depressing!
Now Or Never Publishing: because they may publish prose but they will still kick your ass
ECW Press: because they actually read my pitch letter and sent me a personalized rejection
There are also good resources at the following Canadian writers’ associations, to which I do not belong: