The 2020–21 Swiss Basketball League (SBL) season was the 90th season of the top tier basketball league in Switzerland.
Fribourg Olympic won its third title in a row and its 19th total title, after defeating eight-seeded Starwings in the finals of the playoffs.
The league was reduced from 12 to 9 teams, after Riviera Lakers were refused a license to compete and Swiss Central and Pully-Lausanne Foxes requested to step down to Ligue B.
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