The Canadian National Soccer League, known as the National Soccer League until 1993, was a professional soccer league in Canada that existed from 1926 to 1997. Adding 'Canadian' in 1993 was a result of the folding of the original CSL, and the accepting of the Winnipeg Fury, making the league more national.
It was then re-branded as the Canadian Professional Soccer League in 1998, primarily as a result of the restructuring in conjunction with the OSA; and subsequently as the second Canadian Soccer League in 2006 with aspirations for national expansion.
Note - clubs are listed by name and year that a club by that name participated. Whether clubs by the same name were indeed the same club or not has not been made clear by the source used for compiling this list. Note as well that the same source does not include information for the Eastern Division of the league from the 1930s through to the 1950s, nor any information at all for the following seasons: 1968, 1969, from 1983 through 1992, and 1994. Moreover, the source provides only an incomplete list of teams for 1947 through 1949, and, for a few other seasons, not all team names in full.