The 2008–09 Swiss Super League was the 112th season of top-tier football in Switzerland. The competition was officially named AXPO Super League due to sponsoring purposes. It began on 18 July 2008 with a match between Young Boys Bern and reigning champions FC Basel, which the latter won by 2–1. The last matches were played in May 2009.
9th placed FC St. Gallen and Challenge League runners-up AC Bellinzona competed in a two-legged relegation play-off after the end of last season. Bellinzona won 5–2 on aggregate and thus earned promotion, while St. Gallen were relegated.
^Being a Liechtenstein club, Vaduz are not eligible for qualification to European competitions via the Swiss league system. They did, however, qualify for the second qualifying round of the UEFA Europa League by winning their domestic 2008–09 Liechtenstein Cup.
Results
Teams play each other four times in this league. In the first half of the season each team played every other team twice (home and away) and then do the same in the second half of the season.