Division 1 (Lebanon) 2025/26

The Decathlon Lebanese Basketball League operates as the premier men's competition within the national structure. Organised by the Lebanese Basketball Federation, it occupies Level 1 of the local pyramid. The format combines a single round-robin regular season with a split outcome for the top and bottom groups. The eight highest-placed teams advance to playoffs, while the final four contest a play-out to avoid relegation to the Second Division. Promotion from the lower tier occurs through a separate playoff.

Al Riyadi Club Beirut holds the record for success, securing 39 titles across three distinct periods. The club dominated in the early era, maintained strength during the professional reform of 1992, and remains a leading force in recent years. They currently hold the championship title. Other participants include Al Markazia, Antonine, Antranik Beirut, Beirut Club, and Chabeb Batroun. The league features twelve teams in total.

A defining characteristic distinguishes the competition from others in the region. Major clubs reflect the country’s confessional system, creating deep sectarian and political affiliations. Al Riyadi holds Sunni-linked connections, while Sagesse is Christian-linked. This landscape makes the league a substitute for football in cultural importance. Lebanese clubs achieve disproportionate success in Asian and Arab continental competitions, winning multiple FIBA Asia Champions Cup and Arab Club Championship titles despite the league's relatively small size.

The competition was originally founded in 1951, with the first season played in 1951–52. It was suspended during the Lebanese Civil War and re-established in its current format in 1992. Media mogul Antoine Choueiri is credited with the professionalisation of the sport and heavy investment in clubs like Sagesse during that reform period. The league is currently sponsored by Decathlon.