The Swiss Basketball League, also known as SB League or SBL, is the top-tier professional club basketball league in Switzerland. It is organized by Swiss Basketball. The winners of the SBL are crowned Swiss national basketball champions. Currently, twelve teams compete in the league. Historically, Fribourg Olympic is the league's most successful team, as it has won a league-record 19 championships. Until 2017, the league was known as the Championnat LNA.

The national professional club basketball competition of Switzerland is divided into two separate league levels, the top-tier level SBL, and the 2nd-tier level LNB, with a system of promotion and relegation between the two league levels.

Current teams as of the 2024-25 season:

Source:

Bold indicates clubs which will play in the 2018–19 Swiss Basketball League.