1975 Canadian Soccer League season

The 1975 Canadian Soccer League season was the fifty-second season for the National Soccer League (NSL) which operated under the Canadian Soccer League (CSL) name for the season. The season began in April and concluded in late October with Toronto Italia securing a double (NSL Championship, and First Division title). Italia would also win the Canadian Open Cup by defeating the Challenge Trophy champions London Boxing and Athletic Club of Victoria from British Columbia. The Serbian White Eagles were the NSL Cup winners and the Canadian representative for the 1975 CONCACAF Champions' Cup.

In the Second Division, the Windsor Stars were the divisional champions by finishing first in the standings, which secured automatic promotion to the First Division. A postseason tournament was utilized in the Second Division where St. Catherines Heidelberg won the NSL II Championship after defeating Windsor. As the membership in the league increased the NSL was divided into two separate divisions (First and Second Division) with a promotion and relegation system. Toronto Croatia would purchase 50% of the Toronto Metros to form Toronto Metros-Croatia in the North American Soccer League, while still retaining a reserve team in the NSL.