Only one does in terms of the Constitution, which is Quebec. It has three in recognition of the unique nature of the civil law component, which is different from the other nine provinces' and three territories' legal systems.
That being said, there is a tradition that three judges come from Ontario, two judges come from western provinces and one judge comes from the eastern provinces. That has been softened from time to time historically, but for the most part, it has worked in that fashion.