Senior and professional football teams in Canada, from the origins of Canadian football after it first deviated from rugby. In general, the term senior was used to describe the highest level of football in Canada before about 1950. After 1950, the phrase professional football came into more use, though there was a transition period through the late 1940's and 1950's. The change coincided with the shift of requiring players to be amateurs (not paid) to allowing non-amateurs.
For a list of current CFL teams, see the latest CFL season page.
Years reflect team formed/end dates, not seasons of play.